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Home , Alamosa Formation, Anderdon Limestone, Aquitanian (stage), Ballenas Island Light, Barbican, Bayport Limestone

Index to the Geologic Names of

By DRUID WILSON, GRACE C. KEROHER, and BLANCHE E. HANSEN

GEOLOGIC NAMES OF NORTH AMERICA

GEOLOGICAL SURVEY BULLETIN 10S6-B

Geologic names arranged by and by area containing type locality. Includes names in Greenland, the West Indies, the Pacific Island possessions of the , and the Trust Territory of the Pacific Islands

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1959 UNITED STATES DEPARTMENT OF THE INTERIOR

FRED A. SEATON, Secretary

GEOLOGICAL SURVEY

Thomas B. Nolan, Director

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.G. - Price 60 cents (paper cover) CONTENTS Page Major stratigraphic and time divisions in use by the U.S. Geological Survey._ iv Introduction______407 Acknowledgments. _--______410 Bibliography______410 Symbols______413 Geologic time and time-stratigraphic (time-rock) units______415 Time terms of nongeographic origin______-______415 Cenozoic______415 (glacial)______415 Cenozoic (marine)______418 Eastern North America______418 Western North America__-__-_____------__-----____ 419 Cenozoic (continental)______421 Mesozoic______421 Cretaceous______422 Jurassic______422 ______422 Paleozoic.______422 Permian______.______423 Pennsylvanian______423 Mississippian______424 Devonian______425 Silurian______425 Ordovician______426 Cambrian______426 -______427 Rock Units ..______429 United States.....______.______429 ...______.__ 576 St. Pierre and Miquelon______603 Mexico.______._ 603 Central America______607 Greenland.....___.______.____...__ 609 Bermuda______611 West Indies..______612 Pacific Islands______618 Additions and corrections...-______-____.-______------621 ni Major stratigraphic and time divisions in use by the U.S. Geological Survey

Estimated ages of tune Era or Period or Epoch boundaries in millions of '

Recent Pleistocene 1_ Cenozoic 10 ocr 40 £ff\ 2 Upper (Late) Lower (Early) 10K Upper (Late) Mesozoic Middle (Middle) Lower (Early) i^n Upper (Late) Triassic Middle (Middle) Lower (Early) 1 9ft 2 OAR Upper (Late) g § | 2 Middle (Middle) f2.2 Lower (Early) Q-^ 5? 2 Upper (Late) Lower (Early) oec Upper (Late) Paleozoic Middle (Middle) Lower (Early) 01 C Upper (Late) 2 Middle (Middle) Lower (Early) OCA Upper (Late) 2 Middle (Middle) Lower (Early) IOA Upper (Late) 2 Middle (Middle) Lower (Early) Kin Informal subdivisions such as upper, middle, Precambrian 2 and lower, or upper and lower, or younger and older may be used locally.

Terms designating time are La parentheses. Informal time terms early, middle, and late may be used for eras, periods, and epochs where there is no formal subdivision into Early, Middle, and Late. Informal rock terms lower, middle, and upper may be used where there is no formal subdivision of a system or of a series. 1 Age values given are the Holmes "B" time scale points (Holmes, 1947, p. 145). pates are rounded to the nearest 5 million years. The errors are unknown, but more recent age determinations by various phys­ ical methods are in partial agreement with these values. For a recent compilation of radiogenic dates see selection of Adolph Knopf in Longwell's "Geologic column and scale of time" (1958, AGI 5). 8 Provincial series accepted for use in U.S. Geological Survey reports are listed under both the time and the rock units. IV GEOLOGIC NAMES OF NORTH AMERICA

INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA

By DRUID WILSON, GRACE C. KEROHER, and BLANCHE E. HANSEN

INTRODUCTION Beginning in 1902, the U.S. Geological Survey has published five compilations treating the names of geologic formations and strati- graphic classification and nomenclature: "North American Geologic Formation Names," by F. B. Weeks (Bull. 191, 1902). "The Geologic Time Classification of the United States Geo­ logical Survey Compared with Other Classifications, Accompanied by the Original Definitions of Era, Period, and Epoch Terms," by M. Grace Wilmarth (Bull. 769, 1925). "Names and Definitions of the Geologic Units of ," by M. Grace Wilmarth (Bull. 826, 1931). "Lexicon of Geologic Names of the United States (including )," by M. Grace Wilmarth (Bull. 896, 1938; reprinted 1951, 1957). "Geologic Names of North America Introduced in 1936-1955," by Druid Wilson, W. J. Sando, R. W. Kopf, and others (Bull. 1056-A, 1957). The demand for compilations of geologic names is well attested by the circumstance surrounding the completion of the first Survey compilation by F. B. Weeks. In 1899, after it became apparent that the task was too great for one compiler, Survey geologists were asked to help, and were apportioned parts of the geologic literature to review. In this way the compilation was completed and published in 1902. The following geologists participated: M. R. Campbell, N. H. Darton, J. S. Diller, G. H. Girty, C. W. Hayes, F. H. Knowlton, F. L. Ransome, G. 0. Smith, A. C. Spencer, T. W. Stanton, J. A. Taff, T. W. Vaughan, and David White. Wilmarth's compilation of terms used in geologic-tune classification was published in 1925 and is still invaluable for quotations of the original definitions and descriptions of the standard and other strati- 407 408 GEOLOGIC NAMES OF NORTH AMERICA

graphic and tune divisions from widely scattered and sometimes un­ available sources. The California names and their annotations pub­ lished in 1931 were repeated without change in Wilmarth's lexicon of the United States names in 1938. The reprinting of Wilmarth's lexicon in 1951 and 1957 confirms its place in the field of geologic publications. Brevity of format in "Geologic Names of North America Introduced in 1936-1955" made it possible to bring out quickly a compilation intended to be superseded by the first supplement to Wilmarth's lexicon, now in preparation. In the present report the geologic names of North America, including Greenland, the West Indies, the Pacific Island possessions of the United States, and the Trust Territory of the Pacific Islands, that were published before 1956 are arranged to form a nonalphabetic index to Wilmarth's lexicon and to the "Geologic Names of North America Introduced in 1936-1955." This grouping of the names on the basis of the age and politico-geographic divisions containing the type locality is an easily used key not available elsewhere. The age of each formation (that is, rock unit) named from an area is shown, but not its complete geographic extent. The geologic-tune and time- stratigraphic units are grouped together under the major time divisions. Some names entered in Wilmarth's lexicon have been omitted. They include (a) all paleontologic and descriptive terms, (b) all names of economic units, such as miner's terms, trade names, and subsurface names identical with the names of formal rock units, (c) the names of moraines and other units of which physiography is an essential part of the definition, and (d) the names of orogenies. The American Commission on Stratigraphic Nomenclature (1955, p. 2008) has recommended that the names of moraines and other physiographic units be considered informal and not subject to the rules that apply to stratigraphic names. The names of the rock units are listed once only in the geographic area that contains or is assumed to contain the type area or locality. Thus, the Grenville series, a geologic name commonly used in the State of , is listed under the Canadian province of , where its type locality occurs; and the group or , used widely in Canada, is under the State of Colorado. Not all geologic formations end at political boundaries. In the period of more than 20 years since the compilation if Wil­ marth's lexicon, many names have been revised and many names not then accepted for use by the U.S. Geological Survey have been adopted. Adoption of names for use by the U.S. Geological Survey is based on the published and unpublished reports of Federal Survey geologists on areas of the United States and its possessions or trust INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 409

territories. The U.S. Geological Survey has had occasion to consider for acceptance or rejection considerably less than one-half of the names of geologic units occurring in the United States. The names of units adopted through 1958 appear in boldface type under their currently designated ages. Changes in the designated rank and age of the named units accepted for use in U.S. Geological Survey reports are shown here as by the Chief Geologist, upon the recom­ mendation of the Geologic Names Committee of the Federal Survey. They embody all changes, published or unpublished, made before July 1, 1959. Numerous inconsistencies in listed age assignments are apparent in this compilation. These result in part from differences of opinion of the original authors and in part from Survey-accepted revisions and investigations that have been made since the publication of Wilmarth's lexicon. Thus, the inconsistencies illustrate the essential subjectivity of all age assignments and reflect the objectivity that a compiler seeks to attain. The compilers are responsible for listing changes in the age designa­ tions of certain non-Survey names. These are (a) age assignments of a few units whose ages had been listed hi general terms; (b) placing under Paleocene some units formerly listed as Eocene; and (c) assign­ ment of some units of Pennsylvanian age to provincial series in conform- ance to the nomenclature adopted by agreement of the State geological surveys of Iowa, Kansas, , Nebraska, and Oklahoma and for the most part accepted by the U.S. Geological Survey. Age changes and future revisions of all units will be considered in supplements to Wilmarth's lexicon, where they can be adequately documented. The first supplement is now in preparation. The names are grouped under two main categories: (a) geologic-tune and time-stratigraphic units, and (b) rock units. Only the time units require explanation. There is general agreement among American geologists as to the major practical stratigraphic and time divisions, if not as to their boundaries. Those in use by most geolo­ gists and the U.S. Geological Survey are shown in the table (p. rv). Less agreement exists in the use of the term "series." "Series" has been used as a rock (rock-stratigraphic) term of higher rank than "group," but more commonly as a time-stratigraphic (tune-rock) term for a subdivision of a system. In the following reports concerned with stratigraphic classification and nomenclature, "series" has been considered as a part of the time-stratigraphic classification: Schenck and Muller (1941, p. 1421), the American Commission on Stratigraphic Nomenclature (1947, p. 523), Hedberg (1948, p. 452; 1958, p. 1892), Woodring (1953, p. 1082), and Dunbar and Rodgers (1957, p. 297-298). The use of "series" as a time-stratigraphic term has been recom- 410 GEOLOGIC NAMES OF NORTH AMERICA mended by the American Commission on Stratigraphic Nomenclature (1956, p. 2006), and the U.S. Geological Survey will consider this usage for acceptance when the Commission adopts the revised Strati- graphic Code. Because of this variance in usage, the names of most series are listed with both the time and the rock units, but a few names of series that are undefined and have had little or no usage for example, the Nutrian series of Jurassic age in Arizona are listed only under the rock units. The names of some series and stages which have been derived from units listed in Wilmarth's lexicon as rock units, and which are currently in wide usage, appear under the time units as a part of the standard sequences of certain periods. These are cited from the various sources from which the standard sequences were taken, and the designation under which they are entered in Wilmarth's lexicon appears in brackets; the Osage series [see Osage group 1] of Early Mississippian age is an example. Precambrian series that have been used to indicate correlative time are listed with the time units, but the majority of the Precambrian series names are listed only under the rock units. ACKNOWLEDGMENTS We are grateful for the cooperation and assistance of George V. Cohee, chairman, and the staff of the Geologic Names Committee during the compilation of this index. Thanks are extended to Ellen James Trumbull for advice on the problems of arrangement and to Allison R. Palmer for advice concerning Cambrian time-stratigraphic terms. Other colleagues to whom we are indebted for helpful sug­ gestions are: Jean M. Berdan, W. A. Cobban, P. E. Cloud, Jr., Helen Duncan, D. L. Durham, J. T. Dutro, James Gilluly, C. B. Hunt, G. E. Lewis, F. S. MacNeil, C. W. Merriam, G. N. Pipiringos, C. A. Repenning, R. J. Ross, Jr., W. J. Sando, G. R. Scott, J. E. Smedley, P. D. Snavely, Jr., Sandra Whalen Stock, Martha Toulmin, J. A. Vedder, and W. P. Woodring. BIBLIOGRAPHY Inasmuch as the correlation charts prepared by the Committee on Stratigraphy of the National Research Council, usually referred to as the GSA (Geological Society of America) correlation charts, are the major source of the arrangements of the standard time sequences given under the time units, they are listed here by number as a convenient source of reference. Other references follow, listed alphabetically. GSA Charts Chart 1. Howell, B. F., and others, 1944, Correlation of the Cambrian for­ mations of North America: Geol. Soc. America Bull., v. 55, no. 8, p. 993-1003. 2. Twenhofel, W. H., and others, 1954, Correlation of the Ordovician formations of North America: ibid., v. 65, no. 3, p. 247-298. INDEX TO THE GEOLOGIC NAMES OP NOETH AMERICA 411

Chart 3. Swartz, C. K., and others, 1942, Correlation of the Silurian forma­ tions of North America: ibid., v. 53, no. 4, p. 533-538. 4. , G. A., and others, 1942, Correlation of the Devonian sedi­ mentary formations of North America: ibid., v. 53. no. 12, pt. 1, p. 1729-1794. 5. Weller, J. M., and others, 1948, Correlation of the Mississippian formations of North America: ibid., v. 59, no. 2, p. 91-196. 6. Moore, E. C., and others, 1944, Correlation of Pennsylvanian for­ mations of North America: ibid., v. 55, no. 6, p. 657-706. 7. Dunbar, C. O., and others, (in preparation), Correlation of the Permian formations of North America: ibid. 8a. Eeeside, J. B., Jr., and others, 1957, Correlation of the Triassic formations of North America exclusive of Canada: ibid., v. 68, no. 11, p. 1451-1514. 8b. McLearn, F. H., 1953, Correlation of the Triassic formations of Canada: ibid., v. 64, no. 10, p. 1205-1227. 8c. Imlay, E. W., 1952, Correlation of the Jurassic formations of North America exclusive of Canada: ibid., v. 63, no. 9, p. 953-992. 8d. Frebold, Hans, 1953, Correlation of the Jurassic formations of Canada: ibid., v. 64, no. 10, p. 1229-1246. 9. Stephenson, L. W., and others, 1942, Correlation of the outcropping Cretaceous formations of the Atlantic and Gulf Coastal Plain and trans-Pecos Texas: ibid., v. 53, no. 3, p. 435-448. lOa, Imlay, E. W., 1944, Correlation of the Cretaceous formations of the Greater Antilles, Central America, and Mexico: ibid., v. 55, no. 8, p. 1005-1045. lOb. Cobban, W. A., and Eeeside, J. B., Jr., 1952, Correlation of the Cretaceous formations of the Western Interior of the United States: ibid., v. 63, no. 10, p. 1011-1043. lOc. McLearn, F. H., and others, (in preparation), Correlation of the Cretaceous formations of Canada: ibid. lOd. Imlay, E. W., and Eeeside, J. B., Jr., 1954, Correlation of the Cretaceous formations of Greenland and Alaska: ibid., v. 65, no. 3, p. 223-246. lOe. Imlay, E. W., Popenoe, W. P., and Murphy, M. A., (in preparation), Correlation of the Cretaceous formations of The Pacific Coast of the United States and northwestern Mexico: ibid. 11. Weaver, C. E., and others, 1944, Correlation of the marine Cenozoic formations of western North America: ibid., v. 55, no. 5, p. 569- 598 12. Cooke, C. W., Gardner, Julia, and Woodring, W. P., 1943, Cor­ relation of the Cenozoic formations of the Atlantic and Gulf Coastal Plain and the Caribbean region: ibid., v. 54, no. 11, p. 1713-1723. Reports American Commission on Stratigraphic Nomenclature, 1947, Note 1 Organiza­ tion and objectives of the stratigraphic commission: Am. Assoc. Petroleum Geologists Bull., v. 31, no. 3, p. 513-528. 1956, Eeport 4 Nature, usage, and nomenclature of rock-stratigraphic units: Am. Assoc. Petroleum Geologists Bull., v. 40, no. 8, p. 2003-2014. Bell, W. C., Berg, E. R., and Nelson, C. A., 1956, Croixian type area upper Mississippi Valley, in Eodgers, John, ed., El sistema Cdmbrico, su paleo- geografia y el problema de su base, tomo 2: Internat. geol. Gong., 20th, Mexico 1956, p. 415-442. Chadwick, G. H., 1930, Subdivisions of geologic time [abs.]: Geol. Soc. America Bull., v. 41, no. 1, p. 47-48. Dunbar, C. O., and Eodgers, John, 1957, Principles of stratigraphy: New York, John Wiley and Sons, 356 p. Durham, J. W., 1954, The marine Cenozoic of California: California Div. Mines Bull. 170, chap. 3, p. 23-31. Durham, J. W., Jahns, E. H., and Savage, D. E., 1954. Marine-nonmarine relation­ ships in the Cenozoic section of California: California Div. Mines BulL 170, chap. 3, p. 59-71. 412 GEOLOGIC NAMES OF NORTH AMERICA

Gill, J. E., 1952, Early history of the Canadian Precambrian Shield: Geol. Assoc. Canada Proc., v. 5, p. 57-68. 1955, Precambrian nomenclature in Canada: Royal Soc. Canada Trans., 3d ser., v. 49, sec. 4, p. 25-29. 1955a, Precambrian history of the with notes on cor­ relation and nomenclature: Geol. Assoc. Canada Proc., v. 7, pt. 2, p. 117-124. Goudkoff, P. P., 1945, Stratigraphic relations of Upper Cretaceous in Great Valley, California: Am. Assoc. Petroleum Geologists Bull., v. 29, no. 7, p. 956-1007. Grout, F. F., and others, 1951, Precambrian stratigraphy of Minnesota: Geol. Soc. America Bull., v. 62, no. 9, p. 1017-1078. Harris, G. D., 1932, Suggestions in stratigraphic nomenclature: Science, new ser., v. 76, no. 1978, p. 489. Hedberg, H. D., 1948, Time-stratigraphic classification of sedimentary rocks: Geol. Soc. America Bull., v. 59, no. 5, p. 447-462. 1958, Stratigraphic classification and terminology: Am. Assoc. Petroleum Geologists Bull., v. 42, no. 8, p. 1881-1896. Holmes, Arthur, 1947, The construction of a geological time-scale: Geol. Soc. Glasgow Trans., v. 21, pt. 1, p. 117-152. Kleinpell, R. M., 1934, Difficulty of using cartographic terminology in historical geology: Am. Assoc. Petroleum Geologists Bull., v. 18, no. 3, p. 374-379. 1935, Proposed biostratigraphic classification of California Miocene [abs.]: Geol. Soc. America Proc. 1934, p. 390. 1938, Miocene stratigraphy of California: Tulsa, Okla., Am. Assoc. Petroleum Geologists, 450 p. Knopf, Adolph, 1955, Bathyliths in time, in Poldervaart, A., ed., Crust of the earth a symposium: Geol. Soc. America Spec. Paper 62, p. 685-702. Leith, C. K., 1934, The pre-Cambrian: Geol. Soc. America Proc. 1933, p. 151-180. Longwell, C. R., 1958, Geologic column and scale of time: AGI [Am. Geol. Inst. Data Sheet] 5; in GeoTimes, v. 2, no, 9, p. 13-14. Malkin, D. S., 1953, Biostratigraphic study of Miocene Ostracoda of New Jersey, , and : Jour. Paleontology, v. 27, no. 6, p. 761-799. Mallory, V. S., 1953, California lower Tertiary foraminiferal sequence [abs.]: Jour. Paleontology, v. 27, no. 6, p. 903; Am. Assoc. Petroleum Geologists Bull., v. 37, no. 12, p. 2781; Jour. Sed. Petrology, v. 24, no. 2, p. 345 [1954]. 1954, Correlation [chart] of Eocene of California by a comparison of Laiming's and Mallory's proposed stages: Pacific Petroleum Geologist, v. 8, no. 10 [11], p. 1. 1959, Lower Tertiary biostratigraphy of the California Coast Ranges: Tulsa, Okla., Am. Assoc. Petroleum Geologists, 416 p. Natland, Manley, 1953, Correlation [chart] of Pleistocene and Pliocene stages in southern California, in Pacific Petroleum Geologist, v. 7, no. 2, p. 2. Rodgers, John, 1954, Nature, usage, and nomenclature of stratigraphic units a minority report: Am. Assoc. Petroleum Geologists Bull., v. 38, no. 4, p. 655-659. Schenck, H. G., and Kleinpell, R. M., 1936, Refugian of Pacific Coast Tertiary: Am. Assoc. Petroleum Geologists Bull., v. 20, no 2, p. 215-225. Stainforth, R. M., 1953, The basis of correlation of Middle America: Soc. Geol. Peru Bol., v. 26, p. 247-261. Wilson, J. T., 1952, Some considerations regarding with special reference to Precambrian time: Am. Geophys. Union Trans., v. 33, no. 2, p. 195-203. Wood, H. E., 2d, and others, 1941, Nomenclature and correlation of the North American continental Tertiary: Geol. Soc. America Bull., v. 52, no. 1, p. 1-48. Woodring, W. P., 1953, Stratigraphic classification and nomenclature: Am. Assoc. Petroleum Geologists Bull., v. 37, no. 5, p. 1081-1083. INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 413

SYMBOLS Names printed in boldface type have been adopted for use by the U.S. Geological Survey, t Names preceded by a dagger have been either abandoned by their authors or rejected for use by the U.S. Geological Survey. 1 Names followed by this superscript are in Wilmarth's "Lexicon of Geologic Names of the United States (Including Alaska)" (U.S. Geol. Survey Bull. 896). 2 Names followed by this superscript are in "Geologic Names of North America Introduced in 1936-1955" (U.S. Geol. Survey Bull. 1056-A). Names in use by the U.S. Geological Survey for which the rank or lithic designation has been changed are followed by the former designation in parenthesis, except when the original combination is a part of the currently accepted usage. Examples (both from the Pleistocene names of Kansas): Pearlette ash 1 member (of Sappa formation) Missler member (of Ballard formation);(as member of Meade formation 2)

GEOLOGIC TIME AND TIME-STRATIGRAPHIC (TIME- ROCK) UNITS Sequences of units commonly used as standards for North America are given under each major time division. They have been assembled from several sources, but mainly from the correlation charts prepared by the Committee on Stratigraphy of the National Research Council. Certain of the sequences coincide in part or completely with current usage of the U.S. Geological Survey; thus the units adopted are shown in boldface type. A single unit in boldface within a sequence does not indicate that all or other parts of the sequence have been adopted; only those units appearing in boldface type are currently in use by the Survey. In all instances the precise rank and terminology, and certain restrictions in Survey usage, are noted. TIME TERMS OF NONGEOGRAPHIC ORIGIN The terms listed below have been proposed for various units of geologic time. The nongeographic origin probably indicates that all were intended for world-wide application. A few have had considerable usage, but most of the terms are currently replaced by standard divisions of geologic time (see table, p. iv). The nongeographic term Phanerozoic has come into usage as a convenient ex­ pression covering Cambrian plus all later time. It was proposed as the Phanerozoic or Phanerpbiotic eon by Chadwick (1930, p. 48) together with the Cryptozoic or Cryptobiotic eon for all Precambrian time. Harris (1932, p. 489) independently proposed the Phenozoic and Cryptozoic eons for the same spans of time. Recent Mesozoic Autocene 1 Deutozoic * l Tetrazoic 1 fPsychozoic era l Trizoic * Quaternary Precambrian Antropoceno periodo 2 " Agnotozoic era l Cenocene series l ' Archean period or system l Epicene series 1 Archeozoic era 1 Hectozoic l "Azoic era l Tertiary Collozoic age l Neozoic 1 'Eobiotic era 1 Pentozoic 1 "Eomorphic era 1 ' Eozoic era l Miocene-Pliocene Eparchean 1 l ; Neocene ' Hypozoic era l Eocene-Oligocene "Progonic 1 Eogene 1 era 1 Paleocene-Oligocene Protozoic era 1 Paleogene 1 Prozoic era 1 CENOZOIC Pleistocene (glacial) The following glacial and inter glacial stages typically developed *in central North America are commonly used as the North American standard sequence (see Cooke and Gardner in Cooke, Gardner, and Woodring, 1943, Chart 12): 'Wisconsin [glacial] stage 1 (Wisconsin) * Sangamon [interglacial] stage 1 () [glacial] stage l (Illinois) < Yarmouth [interglacial] stage l (Iowa) Kansan [glacial] stage 1 (Kansas; standard sections in Iowa) Aftonian [interglacial] stage 1 (Iowa) kNebraskan [glacial] stage 1 (Nebraska) * The U.S. Geological Survey currently has under consideration the usage of time-stratigraphic nomen­ clature in the Pleistocene epoch. 415 416 GEOLOGIC NAMES OF NORTH AMERICA

Pleistocene (glacial) Continued The glacial Pleistocene time and time-stratigraphic units listed below have been used or are currently in use: Central North America Pleistocene (Wisconsin) Almenan subage 2 (Kansas) Ashawan l (Iowa) Bradyan interglacial substage 2 (Nebraska) Cary substage l (Illinois) Cochrane glacial substage 2 (Ontario) Eldoran epoch and series * (Iowa) Farmdale substage 2 (Illinois) fHudsonian substage 1 (Great region) lowan substage (as stage l) (Iowa) fManitoban substage 1 ( region) Mankato substage 1 (Minnesota) fPeorian stage * (Illinois) fQuebecan substage * (Great Lakes region) Scandian subage 2 (Kansas) Tazewell substage 1 (Illinois) Valders glacial substage 2 (Wisconsin) fWabash stage * () Pleistocene (Illinoian and Sangamon) Centralian epoch and series 1 (Illinois) Pleistocene (Kansan and Yarmouth) Ottumwan epoch and series 1 (Iowa) Pleistocene (Kansan) Mahaskan glacial epoch 1 (Iowa) Pleistocene (Nebraskan and Aftonian) Grandian epoch and series l (Iowa) Pleistocene (Nebraskan) Adelphian l (Iowa) Pleistocene ("pre-Nebraskan") Gravoisan glacial epoch 1 (Missouri) Moingonan glacial epoch 1 (Iowa) Northeastern United States and eastern Canada Pleistocene fChamplain period l (Vermont-New York-) stage * (Great Lakes region) St. Lawrence stage 1 (St. Lawrence Valley) Toronto stage 1 (Ontario) Warren stage l (Great Lakes region) Northeastern United States (Atlantic coastal region) Pleistocene Boston glacial substage 2 (Massachusetts) College Point stage 1 (Long Island, N.Y.) Gardiners stage 1 (Gardiners Island, N.Y.) Heampstead substage 1 (Long Island, N.Y.) Herod substage * (Long Island, N.Y.) Jacob stage 1 (Long Island, N.Y.) Jameco stage 1 (Long Island, N.Y.) Jerseyan stage * (New Jersey) Lexington glacial substage 2 (Massachusetts) Manhasset stage 1 (Long Island, N.Y.) Mannetto stage 1 (Long Island, N.Y.) Montauk substage 1 (Long Island, N.Y.) Port Washington stage 1 (Long Island, N.Y.) Vineyard interglacial stage 1 (Massachusetts) Cordilleran North America ( region) Pleistocene Albertan J () Albion glacial stage 1 (Colorado) Alma glacial substage 2 (Colorado) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 417

Pleistocene (glacial) Continued Cordilleran North America (Rocky Mountain Region) Continued American Lakes glacial substage 2 (Colorado) Angel glacial stage 1 (Nevada) fAnimas interglacial epoch ! (Colorado) Arapaho glacial stage 2 (Colorado) Bigelow glacial substage 2 (Colorado) fBighorn glacial epoch J () Blacks Fork glacial stage l () Brisco glacial substage 2 (Colorado) Buffalo glacial stage * (Wyoming) Bull Lake glacial stage l (Wyoming) Cerro glacial stage 1 (Colorado) Chapman Gulch glaciation 2 (Colorado) Clarkston stage 2 (Washington) Corral Creek glacial substage 2 (Colorado) Durango glacial stage 1 (Colorado) Fairplay glacial substage 2 (Colorado) Gould glacial substage 2 (Colorado) Hell Gate glacial substage 2 (Colorado) Hell Inlet glacial stage 2 (Colorado) Home glacial substage 2 (Colorado) Ivanhoe glacial substage 2 (Colorado) Lamoille glacial stage * (Nevada) Lime Creek glacial stage 2 (Colorado) Little Dry glacial stage 1 (Utah) Long Draw glacial substage 2 (Colorado) Monarch glacial stage 2 (Colorado) Neva glacial stage 2 (Colorado) Owl Mountain glacial substage * (Colorado) Pinedale glacial stage 1 (Wyoming) Prairie Divide glacial stage 2 (Colorado) Pretty Meadow glacial stage 2 (Colorado) Provo epoch l or stage * (Utah) River glacial stage 2 (Colorado) St. Eugene interglacial epoch 1 () fSan Juan glacial epoch 1 (Colorado) Silver Creek glacial substage 2 (Colorado) Smith Fork glacial stage l (Utah) Spokane glaciation 1 (Washington) Sprague glacial substage 2 (Colorado) Stillwater glacial stage 2 (Colorado) Temple Lake glacial stage 2 (Wyoming) Thomasville glacial substage 2 (Colorado) Twin Lakes glacial substage 2 (Colorado) fUinta glacial epoch 1 (Colorado) fUncompahgre interglacial interval 1 (Colorado) Walden Hollow glacial stage 2 (Colorado) Wycliffe glacial epoch 1 (British Columbia) Cordilleran North America (Sierra Nevada region, California) Pleistocene Aeolian Buttes stage (see Aeolian Buttes till 2) El Portal stage J Glacier Point (glacial) stage 1 McGee glacial stage 1 Sherwin glacial stage 1 Tahoe glacial stage 1 Tioga glacial stage 1 glacial epoch l 418 GEOLOGIC NAMES OF NORTH AMERICA

Pleistocene (glacial) Continued Cordilleran North America (Cascade Range region) Pleistocene Admiralty glacial epoch l (Washington) Cascadian stage l (Oregon) Detroit glacial stage 2 (Oregon) Jeffersonian stage 1 (Oregon) Leavenworth glacial stage 2 (Washington) Mill City glacial stage * (Oregon) Peshastin glacial stage 2 (Washington) Puyallup interglacial epoch 1 (Washington) Stuart glacial stage * (Washington) Tunnel Creek glacial stage 2 (Oregon) Vashon glacial epoch * (Washington) Willamettian stage 1 (Oregon) Cordilleran North America (Alaska) Pleistocene Anaktuvuk glaciation 2 Brooks Lake glaciation 2 Browne glaciation 2 Caribou Hills glaciation 2 Darling Creek glaciation 2 Delta glaeiation 2 Donnelly glaciation 2 Dry Creek glaciation 2 Echooka glaciation 2 Farewell glaeiation 2 Healy glaciation 2 Creek glaciation 2 Itkillik glaciation 2 Johnston Hill glaciation 2 Mak Hill glaciation 2 glaciation 2 Mount Susitna glaciation 2 Naptowne glaciation 2 Nikolai Creek glaciation 2 Nome River glaciation 2 Riley Creek glaciation 2 Sagavanirktok glaciation 2 Salmon Lake glaciation 2 Selatna glaciation 2 Swan Lake glaciation 2 Mexico Quaternary Mexicana stage 2 Hawaii (Island of Hawaii) Pleistocene Makanaka drift and stage 2 Pohakuloa drift and stage 2 Cenozoic (marine) Eastern North America The subdivisions listed below make up the only part of the standard Tertiary section of the Atlantic and Gulf Coastal Plain for which geographically derived names are given by Cooke and Gardner (in Cooke, Gardner, and Woodring, 1943, Chart 12): fJackson [see Jackson formation * or group; Jacksonian 1 I (Mississippi)] Eocene ; Midway an * (Alabama)] INDEX TO THE GEOLOGIC NAMES OF NORTH AMEBICA 419

Cenozoic (marine) Continued Eastern North America Continued Other time units that have been used for parts of the Tertiary of eastern North America: Atlantic and Gulf Coastal Plain Tertiary f Alabama period * (Alabama) {Atlantic group 1 (New Jersey-Florida) fGulf group 1 (Alabama-Texas) Pliocene fFloridian epoch l (Florida) Miocene and Pliocene fSumter epoch 1 (South Carolina) Miocene Carolinian * (North and South Carolina) "Marylandian 1 (Maryland) Virginian * (Virginia) ' Yorktown epoch 1 (Virginia) Oligocene Vicksburgian l (Mississippi) Eocene fChickasawan stage * (Mississippi) Caribbean region Miocene, late Caimitoan stage * (Dominican Republic) Springvalean stage 2 (Trinidad) Oligocene Stainforth (1953, p. 251) has recognized the use of the Antigua stage (middle Oligocene) and the Anguilla stage (late Oligocene). These stages are based on the Antigua and the Anguilla formations, from the islands of the same names, which are considered by other geologists to be of late Oligocene and age, respectively. Sequence of microfaunal substages proposed for the middle and of the central Atlantic Coastal Plain by Malkin (1953, p. 767-768): flat fYorktownian substage (Virginia) J iSt. Marysan substage (Maryland) < /Choptankian substage (Maryland) (.middle \Calvertian substage (Maryland) Western North America Two sequences of stages are in use for the marine Cenozoic of western North America. The microfaunal stages are based on the chronologic occur­ rence of species or assemblages of species of , believed to be independent of the lithic units in which they are found. The more or less informal megafaunal "stages" are based, according to Durham (1954, p. 23), on the distribution of species of megaf ossils, mainly mollusks and echinoids, within formations and sequences of formations from which the names of the "stages" are derived. The present arrangement is adapted from the marine Cenozoic correlation chart (Weaver and others, 1944, Chart 11), from later additions to the microfaunal sequence by Natland (1953) and by Mallory (1953; 1954; 1959), and from the charts of Durham, Kleinpell, and Savage (in Durham, 1954, p. 25) and Durham, Jahns, and Savage (1954, . 60). The microfaunal stages proposed for the Pliocene nad Pleistocene Ey Natland have not been fully defined and have not yet been used as widely in publication as the microfaunal stages proposed for the Oligocene by Schenck and Kleinpell (1936) and for the Miocene by Kleinpell (1934; 1935; 1938). The Paleocene and Eocene stages earlier proposed by Mallory were fully defined in 1959. The equivalence of the stages of the microfaunal and megafaunal sequences is fairly well established, but the adherents of the two time scales are not in complete agreement on correla­ tion with the standard major Tertiary divisions. The disparity of the two correlations with the Tertiary divisions is graphically shown below. The spacing of the rules shows only the equivalence of the stages of the two scales; no indication of relative time span is intended. A partly dashed rule indicates doubt concerning precise correlation with the apposed stage. All type areas except those indicated are in California. 504,835 5® 2 420 GEOLOGIC NAMES OF NORTH AMERICA Cenozoic (marine) Continued Western North America Continued Microfaunal Megafaunal stages "stages" Hallian stage ^Pleistocene Pleistocene Wheelerian stage San Joaquin [see San Joaquin fm. 1

Venturian stage Pliocene < Etchegoin [see Etchegoin fm. *] Repettian stage Jacalitos [see Jacalitos fm. *] . Delmontian stage Neroly [see Neroly fm. l] Cierbo [see Cierbo ss. *] Mohnian stage Briones [see Briones ss. J] 'Miocene Luisian stage Tembler [see Temblor fm. x] Relizian stage Saucesian stage Vaqueros [see Vaqueros ss. *] Zemorrian stage Blakeley [see Blakeley fm. 1 (Wash.)] >OUgocene Lincoln [see Lincoln fm. l (Wash.)] Refugian stage . . Keasey [see Eeasey sh. 1 (Oreg.)] Narizian stage late Tejon [see Tejon fm. *] "Transition beds" Ulatisian stage middle Eocene < Domengine [see Domengine fm. *] Penutian stage early t Capay [see Capay fm. 1] Bulitian stage Meganos [see Meganos fm. 1 ; lower Eocene according to U.S. Geol. Survey >Paleocene < usage] Ynezian stage Martinez [see Martinez fm. *] Other Cenozoic time units that are in use or have been used in California: Pleistocene Pedroian l Red Bluff epoch l San Pedran epoch l Pliocene and Quaternary Sierran l Eocene, late Fresnian stage 2 Eocene, early Juniperan stage a INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 421

CenozoicJ(continental) Provincial time scale for the North American continental Tertiary based on mammal-bearing units, according to Wood* and others (1941, pi. 1): [ age (Texas) Pliocene < Hemphillian age (Texas) [Clarendpnian age (Texas) age (California) Miocene age (Nebraska) Arikareean age (Nebraska) Whitneyan age (Nebraska) Oligocene Orellan age (Nebraska) Tertiary age (South Dakota) Duchesnean age (Utah) age (Utah) Eocene Bridgerian age (Wyoming) Wasatchian age (Wyoming-Utah) Clarkforkian age (Wyoming) Tiffanian age (Colorado) Paleocene Torrejonian age () Dragonian age (Utah) JPuercan age (New Mexico) Other continental Cenozoic ages and stages: North America Pleistocene age 2 (California) Irvingtonian age 2 (California) California Pliocene (Clarendoniari) Montediablan stage a Cerrotejonian stage 2 MESOZOIC The European stages listed below are commonly used for North America, and according to Longwell (1958, AGI 5) there is no other generally accepted clas­ sification. No standard American time classification is given for any of the periods or systems of the Mesozoic on the correlation charts prepared by the Committee on Stratigraphy of the National Research Council. 'Maestrichtian Santonian Senonian Late Coniacian Turonian kCenomanian Cretaceous ' Aptian Barremian \ .Early Hauterivian I Valanginian >Neocomian Berriasian (Infra- I Valanginian) / Purbeckian Portlandian Late Kimeridgian Oxfordian Callovian Jurassic Middle Bathonian Bajocian Toarcian Pliensbachian Early Sinemurian Hettangian We acknowledge advice on locally data from H. E. Wood, 2d chairman of the committee currently revising the continental time scale. 422 GEOLOGIC NAMES OF NORTH AMERICA

Mesozoic Continued [Rhaetian Late i Norian [Carman (Karnian) Triassic fLadinian Middle \ (Virglorian) Early /Scythian (Werfenian) Cretaceous The units listed below have been used or are currently in use for parts of the Cretaceous in the areas indicated. North America Cordilleran system * fComanchean system 1 (Texas) fShastan system l (California) Gulf Coastal Plain Late Cretaceous Gulf series * (Texas) Early and Late Cretaceous series > (Texas) Early Cretaceous Coahuila series (as Coahuila group2) (Mexico) California and Oregon Early Cretaceous Shasta series l (California) Sequence of microfaunal stages proposed for the Late Cretaceous of California by Goudkoff (1945, p. 956-1007): 'Cheneyan stage ("pre-Martinez Paleocene or post-Moreno Cretaceous"; author favored Paleocene; placed here for convenient listing) Ciervian stage Late Cretaceous Ingramian stage Tracian stage Weldonian stage Cachenian stage ^elevanian stage Jurassic Triassic No geographically derived names of time units based on faunal or physical criteria occurring in the Triassic and Jurassic rocks of North America have been recorded in the Lexicon files. PALEOZOIC A number of names have been proposed for units of great magnitude based on physical and faunal criteria occurring in the rocks of North America. Some of them were thought to be more appropriate for North America than the now standard major stratigraphie and time divisions, which are mainly of European derivation. With the exception of the Mississippian and Pennsylvanian systems, few of these units ever gained very wide acceptance, and none is in current use as a period or system. Some encompass parts or all of more than one of the Paleozoic periods or systems and are so listed below; the others are entered under the appropriate age. Paleozoic Appalachian system l () fNew York system 1 (New York) Devonian Mississippian tBradfordian l (Pennsylvania-New York) Chattanoogan series * (Tennessee) Brian period l (New York) fWaverlyan system 1 () INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 423

Paleozoic Continued Silurian-Devonian Monroan l (Michigan) Yorkian period * (New York) Ordovidan Silurian fOswegan period 1 (New York) fHudson period > (New York) Cambrian Silurian fMohawk system l (New York) Cambrian Ordovidan Ozarkian system l (Missouri) fPotsdam period 1 (New York) fTaconic system l (New York-New England) Cambrian(l) Hudson system l (New York) fTaconian l (New York-New England) Permian The Permian series commonly in use as the standard sequence in central and southwestern United States (see Longwell, 1958, AGI 5) are typically de­ veloped in Texas and New Mexico to which they are restricted in use by the U.S. Geological Survey: Ochoa series 2 (New Mexico) Guadalupe series [see Guadalupe group l (Texas)] ' Leonard series [see Leonard formation 1 (Texas)] Wolf camp series [see Wolf camp formation l (Texas)] Other units: Central United States Permian Big Blue series l (Kansas) Cimmaron series [see under Cimmaron group l (Kansas)] Minco division 2 (Oklahoma) Wanette division > (Oklahoma) Pennsylvanian The type area of the Pennsylvanian system is in the northern Appalachian region in Pennsylvania, but a better standard section is in (Moore and others, 1944, p. 665). The standard sequence for eastern North America, according to the Pennsylvanian correlation chart (Moore and others, 1944, Chart 6), given below, repeats the major stratigraphic divisions commonly used in the eastern United States, except that the Lee and the Kanawha series take the place of the division usually called Pottsville (p. 666). 'Monongahela series [see under l (Penn­ sylvania)] Conemaugh series [see under Conemaugh formation l (Pennsylvania)] Allegheny series [see under l (Pennsylvania)] Kanawha series [see under l (West Virginia)] kLee series [see Lee formation * or group (Virginia)] The sequence given for central North America by Longwell (1958, AGI 5) is, with the exception of the Atoka series in place of the Lampasas series, the same sequence given by Moore and others (1944, Chart 6). They state (p. 666) that these series are used also in western North America and are thought to be applicable to the eastern United States and Canada as well. Their use as provincial series by the U.S. Geological Survey is restricted to the mid-Continent region: Age according to U.S. Geol. Survey usage 'Virgil series l (Kansas) \ r , Missouri series [see Missouri group 1 (Missouri)]/ Des Moines series [see Des Moines group H Atoka series [see » [ Middle (Oklahoma)] J Morrow series [see Morrow group 1 \ Farlu (Arkansas)] / y 424 GEOLOGIC NAMES OF NORTH AMERICA

Pennsyivanian Continued Other Pennsyivanian time units: Eastern United States Pennsyivanian fPittsburg series l (Pennsylvania) Central United States Pennsyivanian Kansas period 1 (Kansas) Late Pennsyivanian Kawvian series (epoch) 2 (Kansas) Middle Pennsyivanian Cygian substage 2 (Missouri) Oklan series (epoch) 2 (Oklahoma) Venteran substage 2 (Missouri) Early and Middle Pennsyivanian fBend series > (Texas) Ti Valley series 2 (Oklahoma) Early Pennsyivanian Ardian series (epoch) * (Oklahoma) Lampasas series * (Texas) Pushmataha series 2 (Oklahoma) Southwestern United States Middle Pennsyivanian Derry series 2 (New Mexico) Mississippian The type area of the Mississippian system is in the upper Mississippi and the lower Ohio valleys (Weller and others, 1948, Chart 6). The series listed below are given by Longwell (1958, AGI 5) for central North America and, except for the form of the names (i.e., Chesterian, etc.), the same series are given by Weller and others as the standard sequence for North America. Their use as provincial series by the U.S. Geological Survey is restricted to the type Mississippian area. Age according to U.S. Geol. Survey usage /Chester series [see Chester group 1 (Illinois)] Meramec series [see Meramec group Late J (Missouri)] ] Osage series [see Osage group * (Missouri)] I Kinderhook series [see Kinderhook group 1 Early ( (Illinois)] Other Mississippian time units: Eastern United States Late Mississippian fTennesseean system l (Tennessee) Central United States Mississippian Leeic period 2 (Iowa) Louisian 1 (Missouri) Valmeyer series 2 (Illinois) Iowa series l (Iowa) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 425

Devonian "Standard section" for North America according to the Devonian correlation chart (Cooper and others, 1942, Chart 4). Type areas, except those noted, are in the State of New York: Bradfordian series (part) [see fBradfordian 1 Conewango stage [see Conewango series 1 (Pennsylvania-New (Pennsylvania)] York)] Chautauquan series [see Chautauquan group *] iCassadaga stage 2 Chemung stage [see under Chemung Senecan series [see under formation l] Seneca >] Finger Lakes stage 2 Taghanie (Taughannock) stage 2 Erian series [see Erie Tioughnioga stage 2 series J] Cazenovia stage [see Cazenovia group l] (Onesquethaw stage a I Deerpark Ulsterian series [see Ulster 1 HelderberL group l] I Helderbergian l] Other Devonian time units: Eastern North America Middle Devonian fHamilton period 1 (New York) Stroudsburgian stage 2 (Pennsylvania) Early Devonian Oriskanian > (New York) Silurian Sequence of series for North America according to the Silurian correlation chart (Swartz and others, 1942, Chart 3): Age according to U.S. Geol. Survey usage 'Cayugan series [see Cayugan, 1 Cayuga group * (New York);! i Cayuga series of the U.S. Geol. Survey] / Niagaran series [see Niagaran1, Niagara series1, Niagara! j group l (New York)] J Albion series [see under Albion 1 (New York);' use of Albion by the U.S. Geol. Survey is currently restricted to Albion group; in the upper Mississippi Early Valley, the Survey uses Alexandrian series l (Illinois)] . Other Silurian time units: Eastern North America Silurian fOntarian J (New York) Late Silurian Salinan 1 (New York) Middle Silurian Anticostian 1 (Quebec) fLockport group l (New York) Early and Middle Silurian fNiagara period x (New York) Early Silurian Medinan 1 (New York) Central North America Middle Silurian fChicago group l (Illinois) 426 GEOLOGIC NAMES OF NORTH AMERICA Ordovician "Generalized standard section" according to the Ordovician correlation chart (Twenhofel and others, 1954, Chart 2): Cincinnatian series l 'Gamachian stage [see Gamachian series l [see also Cincinnatic (Quebec)] system l (Ohio); Richmondian stage [see Richmond group l ; restricted in use by Richmondian l (Indiana)] the U.S. Geol. Sur­ Maysvillian stage [see Maysville group 1 vey to Ohio, Indi­ ()] ana, Kentucky and Edenian stage [see Eden group l ; Edenian l Tennessee] . (Ohio)] Mohawkian stage Trentonian stage [see Mohawkian [see under Trenton series l (New limestone or York); restricted group ! (New Champlainian series in use by the U.S. York)] [see fChamplainian Geol. Survey to Black River stage system * (New New York] [see Black River York)] group 1 (New York)] Chazyan stage [see Chazy group l (New York)] Canadian series [see under fCanadian series fCanadian system (Quebec)] Other Ordovician time units: Eastern North America Ordovician fChamplainic system l (New York) fNashvillean 1 (Tennessee) fTrenton period 1 ; Trentonian J (New York) Middle Ordovician BolananTJ«IQ»-«T, seriesc,Q^-Q=, 2 (Virginia)(nr-,.n,-~'oN/HunterianHatterian subsersubseriesies *2 (Pennsylvania)(Pennsylvania) Chazyan l (New York) Lincolnshirian stage * (Virginia) Early Ordovician Beekmantownian 1 (New York) Shenandoan l (Appalachian region) Stonehengian division 2 (Pennsylvanian) Central and eastern North America Ordovician Simpsonian series 2 (Oklahoma) Cambrian According to the Cambrian correlation chart for North America (Howell and others, 1944, Chart 1) no stages of the Early Cambrian were established and no stages in the Middle Cambrian satisfactorily denned. (Minnesota), Franconian (Minnesota) and Trempealeauan (Wisconsin) (ascending order), denned by the listed sequence of contained faunal zones, were given as stages covering the Late Cambrian. These are discussed and denned as stages of the Late Cambrian Croixan series by Bell, Berg, and Nelson (1956, p. 415-442). Units listed below have been used or are currently in use: Eastern North America Late Cambrian Bretonian 1 () Johannian series '; Johannian 1 () fPotsdamian > (New York) fSaratogan epoch or series 1 (New York) Middle Cambrian Acadian series or epoch * (New Brunswick) Coldbrookian series 2 (Nova Scotia) Conasaugan series 2 (Georgia) Dugaldian series 2 (Nova Scotia) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 427

Cambrian Continued Eastern North America Continued Early Cambrian Etcheminian series 1 (New Brunswick) fGeorgian epoch or series l (Vermont) Labrador series 2 (Labrador) Hanfordian series * (New Brunswick) Placentia l () Terra Nova 1 (Newfoundland) Upper Mississippi Valley Late Cambrian St. Croixan series l ; Croixan 1 (Minnesota) Western North America Middle Cambrian Albertan system 2 (Alberta) Bonnetian age and stage 2 (Nevada) Early Cambrian Waucoban series > (California) PRECAMBRIAN (See also under Time terms of nongeographic origin) Properly, Precambrian divisions should not be listed under time units. The perennial use of terms such as era, period, and system, reflects the desire of geologists to suggest by terminology the impressive magnitude of the Precambrian sequence and the long time-span necessary for the deposition of the sediments, the emplacement of the igneous rocks, subsequent metamorphism, and the develop­ ment of notable . Criteria for consistent worldwide division of this vast expanse of time are inadequate. Stratigraphically significant paleontologic criteria, used for the rest of geologic time, have thus far not been discovered in Precambrian rocks. Radiogenic methods may eventually provide means for inter-regional correlation when there are enough of them, and with reduction of the margin of error in present techniques. Numeric dating, sometimes called the absolute age as opposed to relative age based on , has been determined by radiogenic methods for numerous Precambrian rocks. Whereas this has upheld some lithologic correlations, the results have more commonly shown the unre­ liability of physical unity as a basis for time-stratigraphic correlation. As a result, in the current period of intensified radiogenic investigations, the use of time and time-stratigraphic (time-rock) divisions in the Precambrian of North America has declined. Among the authors who have discussed the problems of correlation and time divisions within the Precambrian are Leith (1934, p. 169), Grout and others (1951, p. 1020, 1063-1064), Wilson (1952, p. 201-202), Gill (1952, p. 57-67; 1955, p. 25-29; 1955a, p. 117-124), Woodring (1953, p. 1083), Rodgers (1954, p. 658), Knopf (1955, p. 698-699), and Dunbar and Rodgers (1957, p. 298). Units more commonly used as standard (i.e., time-stratigraphic) divisions as well as those suggesting great rank are listed below. Greenland Greenlandian 2 Ketilidian 2 Northeastern United States Atlantic period J or system ' (New Hampshire) Great Lakes and Canadian Shield regions Algomic period J (Ontario) t Algonkian period 1 or system 1 (Lake Superior region) Anianic period 1 (Cloud-Cuckoo-Land) Animikie series l ; Animikean l (Ontario) Coutchiching series 1 (Ontario or Minnesota) Grenville series 1 ; Grenvillian * (Ontario) Haileyburian [see Haileyburnian ' (Ontario)] Huronian series l ; Huronic period > (Ontario) Keewatin series 1 (Minnesota) Keweenawan series 1 (Michigan) Knife Lake series l (Minnesota); Knife Lake group of U.S. Geological Survey Labradorian l (Labrador) 428 GEOLOGIC NAMES OF NORTH AMERICA

Precambrian Continued Great Lakes and Canadian Shield regions Continued Laurencic period x (Quebec) Laurentian epoch or series J (Quebec) Loganian l (Ontario) fMichigan period 1 (Michigan) Ontarian J (Ontario) Sudbury series 1 ; Sudburian l (Ontario) Superian era 2 (Lake Superior region) Superioric period 1 (Lake Superior region) Timiskamian series J (Ontario) Varennesic period l (Ontario) Cordilleran North America Belt series '; Beltian system 1 () Bitterroot period J (Montana) Cherric period 1 (Montana) Connaughtic l Grand Canyon series * (Arizona) Llano series 1 (Texas) Madisonic period J (Montana) Selkirkian period J (British Columbia) fTexian system 1 (Texas) Uncompahgran system l (Colorado) ROCK UNITS The names of the rock units are listed once only in the geographic area that contains, or is assumed to contain the type area or locality. The symbols used are explained on page 413. United States United States Continued Alabama Alabama Continued Quaternary (f) Eocene, lower Continued Buttahatchie gravel 1 Greggs Landing marl member Pleistocene (of Tuscahoma sand) l Conecuh sands * tGGreggs Landing series 1 fGeneva sands 1 Gi"ullette Bluff beds 1 f Mobile Bay formation J Hatchetigbee formation 1 Mon Louis formation l Nanafalia formation 1 fOzark sands 1 fNanafalia marl 1 Tertiary Salt Mountain limestone 1 t Alabama white limestone l fTuscahoma marl l Pliocene Tuscahoma sand l or formation Citronelle formation l Wilcox group 1 or formation Miocene (f) fWoods Bluff group or series * Roberts sand J Woods Bluff marl (in Bashi for­ Miocene, lower mation) l Paynes Hammock sand 2 Paleocene Oligocene, middle fBlack Bluff group, clay or Glendon limestone 1 member (of series l Byram formation) Chattahoochee l (formation) Eocene 1 fTombigbee l (formation) Eocene, upper, and Oligocene Bluff member (of Naheola fSt. Stephens division lt forma­ formation); (as beds or series J) tion,1 group, 1 or limestone J McBryde limestone member (of Eocene, upper Clayton formation) * Cocoa sand member (of Yazoo fMatthews Landing group or clay); (as member of Jackson series l formation J) Matthews Landing marl 1 Dellet sand member (of Moodys Midway formation or group l Branch marl) 2 f Midway series or limestone l North Creek member (of Yazoo Naheola formation l clay) * fNaheola marl l Pachuta marl member (of Yazoo fOak Hill-Pine Barren group l clay) 2 Oak Hill member (of Naheola formation)2 Shubuta member (of Yazoo Pine Barren member (of Clayton clay) 2 Shubuta Hill clay « formation); (as beds J) Eocene, middle fRutledge limestone ! fChoctaw buhrstone l fSucarnoochee clay 1 Claiborne group 1 Upper Cretaceous fClaiborne sand 1 Arcola limestone member (of Gosport sand l Mooreville chalk) * Lisbon formation l Coker formation 2 Tallahatta formation 1 fCottondale formation 2 Eocene, lower Demopolis chalk (as division l) Bashi marl member (of Hatch- Eoline member (of Coker forma­ etigbee formation); (as forma­ tion) 2 tion i) fEufaula sands l fBashi marl l Eutaw formation l Bells Landing marl member (of Gordo formation 2 Tuscahoma sand) 1 McShan formation 2 fBells Landing series l Perote member (of Providence JFort Gaines l (formation) sand) * Grampian Hills member (of fPortland division (of Selma Nanafalia formation) 2 chalk)2 429 430 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Alabama Continued Alabama Continued Upper Cretaceous Continued Lower Pennsylvanian Continued Prairie Bluff chalk * Razburg sandstone member (of Selma chalk l or group ) l fSelma division (of Selma chalk) 1 Rocky Ridge sandstone member fTombigbee chalk 1 (of Pottsville formation) 1 ,1 gravel, or Shades sandstone member (of group Pottsville formation) l Lower Cretaceous Straight Ridge sandstone mem­ Vick formation 1 ber (of Pottsville formation) 1 Paleozoic (see also Precambrian or Straven conglomerate member Paleozoic) (of Pottsville formation) 1 Dempsey marble 1 (in Talladega Wolf Ridge sandstone member slate) (of Pottsville formation) 1 Probably Paleozoic Mississippian Jumbo dolomite member (of Burgess oolite (in Bangor lime­ Talladega slate) 1 stone) l Probably Paleozoic (pre-Devonian) Dorans Cove sandstone l Butting Ram sandstone member ' 'Huntsville l (formation) (of Talladega slate) 1 La Grange sandstone l Cheaha sandstone member (of Lauderdale chert l Talladega slate) l "Monte Sano limestone; also Post- group * fBluff Springs granite 1 fOxmoor sandstone and 1 Millerville green schist 1 Rockwood oolite l Pinckneyville granite 1 Spout Spring oolite (in Bangor Post-Carboniferous (?) limestone) 2 Hillabee chlorite schist 1 Upper Mississippian Iwana green schist l Allsboro sandstone J Carboniferous (see Precambrian to Alsobrook member (of Pride Carboniferous; and Cambrian Mountain formation); (as for­ to Carboniferous) mation J) Carboniferous (probably Lower Penn­ Bangor limestone l sylvanian) Floyd shale 1 (see p. 622) Erin shale l Hartselle sandstone 1 Pennsylvanian Little Shades sandstone member Black Creek coal group l (of Parkwood formation) 2 Brookwood coal group * Parkwood formation 1 Cobb coal group l Pride Mountain formation (S.W. Dogwood coal group l Welch, 1958, U.S. Geol. Survey Fayette gas sand l (subsurface) Oil and Gas Inv. Chart OC-58) Gould coal group 1 Southward Bridge formation l Gwin coal group 1 Southward Pond formation l Horse Creek coal group (in Tuscumbia limestone 1 Pottsville formation) 1 Lower Mississippian Mary Lee coal group 1 Fort Payne chert l fMontevallo conglomerate 1 Devonian (see also Cambrian Nunnally coal group 1 Devonian) Pratt coal group 1 Yellow Leaf quartz schist 1 fSand Mountain conglomerate 1 Middle Devonian Straven coal group x Ragland sandstone 1 Lower Pennsylvanian Lower or Middle Devonian Boyles sandstone member (of Frog Mountain sandstone 1 Pottsville formation) l Bremen sandstone member (of Lower Devonian Pottsville formation) l Clear Branch sandstone 1 Camp Branch sandstone member Jemison chert 1 (of Pottsville formation) 1 Silurian (see also Cambrian Chestnut sandstone member (of Devonian) Pottsville formation) 1 formation 1 Lick Creek sandstone member Ordovician (see also Cambrian (of Pottsville formation) 1 Devonian) Lookout sandstone 1 fPelham limestone l Pine sandstone member (of Middle Ordovician Pottsville formation) l Little Oak limestone 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 431

United States Continued United States Continued Alabama Continued Alaska Continued Lower Ordovician Pleistocene or Recent Attalla chert conglomerate mem­ Crater Creek 3 ber (of Chickamauga lime­ Pleistocene (see also Pliocene or stone) l Pleistocene) fBirmingham breccia 1 Bay silts and gravels 1 Chepultepec dolomite 1 Cook Inlet gravels 1 Longview limestone ' or dolomite Copper River silts and gravels J Newala limestone l or formation Ester ash bed 2 Odenville limestone 1 Flaxman formation 1 fSalem breccia 1 Gubik formation (as sand J) Cambrian to Carboniferous Kanektok silts and gravels l Wedowee formation J Eowak clay 1 Cambrian-Devonian jKuskokwim gravels and silts J fRed Mountain group J Togiak gravels l Upper Cambrian silts l Bibb dolomite 1 Tertiary and Quaternary Brierfield dolomite 1 Ashishik basalt 8 Ketona dolomite l Great Sitkin volcanics 2 Middle and Upper Cambrian Idak basalt 2 fCoosa shale J Tulik basalt - JFlatwoods shale l Tertiary (see also Cretaceous or Middle or Upper Cambrian Tertiary) fAldrich limestone J Andrew Bay volcanics 2 Lower Cambrian Hayes River beds 1 jChoccolocco shale l Holokuk basalt 2 Ladiga sandstone J Nenana gravel l jMontevallo formation 1 Porcupine beds J Weisner quartzite or formation l Sand Bay volcanics 2 Precambrian to Carboniferous Twelvemile beds J Talladega slate J or formation Waterboot basalt 2 Precambrian or Paleozoic jYentna beds J Brewer phyllite (as member of Zeto Point basalt porphyry 2 Talladega slate *) Tertiary (?) Sawyer limestone member (of Tok sandstone 1 Waxahatchee slate ') Sylacauga marble member (of Tertiary, upper, to Recent Talladega slate1) Wrangell J Wash Creek slate J Tertiary, upper Waxahatchee slate 1 Belkofski tuff2 Precambrian Cathedral Valley agglomerate 2 Ashland mica schist 1 Tertiary, lower Chewacla marble 1 Sagavanirktok formation 2 HoIIis quartzite l Pliocene or Pleistocene Lundy Mountian type 1 (mica Pinnacle J (system) schist) Pliocene Age(?) Nuwok formation 2 Sougahatchee granite 1 Pliocene(?) Alaska conglomerate ! Quaternary (see also Tertiary and Miocene or Pliocene Quaternary) Nushagak formation 1 Arch Point basalt 2 Miocene and Pliocene(f) Black Point basalt 2 Yakataga formation Dushkin basalt * East Cape volcanics 2 Miocene Little Pavlof agglomerate 2 Unga conglomerate 1 volcanics 2 Miocene(?) Mount Hague volcanics 2 fEska conglomerate l Okmok volcanics 2 Oligocene or Miocene Pavlof volcanics 2 Meshik formation l Pavlof Sister volcanics 2 Oligocene and Miocene Tanak volcanics 8 Poul Creek formation > Volcano Bay basalt flow 2 Oligocene Quaternary^) Basin Creek member (of Katalla Buldir volcanics 2 I formation) 3 432 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Alaska Continued Alaska Continued Oligocene C ontinue d Upper Cretaceous Continued Burls Creek shale member ' (of Sentinel Hill member (of Schra­ Katalla formation) der Bluff formation) 2 Eat all a formation 1 Shaktolik group l Puffy member (of Katalla forma­ Thetis group J tion) ; (as member of Redwood fTuluga member (of Schrader formation l) Bluff formation) 2 Redwood formation 1 Tuluvak tongue (of Prince Creek Oligocene, Upper formation) 2 Point Hey member (of Katalla Ungalik conglomerate 1 formation); (as member of Upper(?) Cretaceous Redwood formation l) Bergman group 1 Oligocene, lower and middle Yakutat group ' Split Creek sandstone member ' Lower and Upper Cretaceous (of Katalla formation) Chandler formation 2 Eocene Corwin formation 1 Getmuna rhyolite group 2 Ignek formation 1 Eushataka formation ' Euskokwim group 2 Stepovak series J Nanushuk group (as formation1) Stillwater formation 1 Lower Cretaceous Tokun formation ' Anaktuvuk group 1 Tyonek formation J fHatbox tongue (of Chandler Eocene, upper formation) 2 Gakona formation 1 Herendeen limestone l Eenai formation ' Eandik formation 1 Eocene or Paleocene(?) Eennicott formation l Chickaloon formation 1 Eoyukuk group l Paleocene(?) or Eocene, lower (f) Nelchina limestone 1 Wishbone formation 2 Okpikruak formation 2 Mesozoic, Tertiary, and Carbonif­ Staniukovich shale l erous^) Topagoruk formation 2 fOklune series * Torok formation 2 Mesozoic (see Paleozoic and Meso­ Tuktu formation 2 zoic) Lower and Lower (?) Cretaceous Mesozoic(?) fUmiat formation 2 Cedar Bay granite 1 Lower Cretaceous(?) Eshamy granite l Jualin diorite l Nellie Juan granite 1 Lower Cretaceous to Carboniferous(?) Upper Mesozoic(?) Gemuk group 2 Orca group ' Cretaceous and Jurassic(f) Valdez group 1 Susitna slate l Cretaceous or Tertiary Jurassic, Cretaceous, and Tertiary Agattu beds 2 f Matanuska series l Cretaceous (see also Jurassic or Cre­ Jurassic or Cretaceous taceous) Boundary granodiorite 1 fCape Beaufort coal measures J Coast Range intrusives 1 Upper Cretaceous and Paleocene(?) Hyder quartz monzonite l Iditarod basalt 2 Eotsina conglomerate : Upper Cretaceous Texas Creek granodiorite l Cantwell formation 1 Jurassic(f) to Lower Cretaceous(f) Chignik formation 1 Douglas Island volcanic group ' Colville group (as series !) Treadwell slate 1 or formation fHoliknuk series l Ealtag formation 1 Skwentna group 1 Eogosukruk tongue (of Prince Upper Jurassic Creek formation) 2 Chinitna shale 1, siltstone, or Matanuska formation 1 formation Melozi formation J Chisik conglomerate member (of Niakagon tongue (of Chandler Naknek formation) l formation) 2 fKatmai series J Nulato formation 1 Naknek formation l Prince Creek formation 2 Pomeroy member (of Naknek Schrader Bluff formation 2 formation) 2 Seabee formation 2 Sheilikof formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 433

United States Continued United States Continued Alaska Continued Alaska Continued Upper Jurassic Continued Upper Paleozoic to Tertiary (?) Tiglukpuk formation 2 fKolmakof series l Tonnie siltstone member {of Lower Paleozoic Chinitna formation) 2 Henry Bay marble 2 Middle and Upper Jurassic Lower Paleozoic(?) fEnochkin formation J fTotsen group l or series J Lower Paleozoic or older Bowser member (of Tuxedni Eigluaik group 1 formation) 2 fLake quartzite schist J Cynthia Falls sandstone member Nome group l (of Tuxedni formation) 2 fRapids schist 1 Gaikema sandstone member (of Tigaraha schist 1 Tuxedni formation) 2 Permian and Lower Triassic Eialagvik formation l Saderochit formation (as sand­ Tordrillo formation l stone l) Tuxedni formation (as sand­ Permian and Triassic(?) stone l) Nikolai greenstone 1 Lower-Upper Jurassic Permian Eingak shale l Mankomen formation 1 Lower or Middle Jurassic(?) Tahkandit limestone ' Thane volcanic group 1 Pre-Permian Lower Jurassic Jacksina formation J Aleuts member (of Kialagvik Pre-Permian (?) formation) 2 Monte Cristo diorite * Bidarka formation 2 Carboniferous and Upper Triassic Kolosh member (of Kialagvik fKetchikan series > formation) 2 Carboniferous (see also Silurian, Talkeetna formation ' Devonian, and Carboniferous) Triassic, Jurassic, and probably Ahtell diorite > Paleozoic Chisna formation : fBerners formation 1 Suslota limestone l Triassic Tetelna volcanics 1 Skolai volcanics l Carboniferous and older, and Upper Triassic and Jurassic or Jurassic Cretaceous fNutzotin series J fGravina series J Carboniferous or older Upper Triassic (see also Carbon Elutina group * iferous and Upper Triassic) Pennsylvanian(?) Chitistone limestone 1 Nation River formation ' Gastineau volcanic group 1 Mississippian Eamishak formation (as chert l) Dadina schist 1 Euskulana formation 1 Lisburne group (as limestone :) McCarthy shale or formation J Livengood chert 1 Nabesna limestone ' Strelna formation 1 Nizina limestone l Wellesley formation l Middle and Upper Triassic Mississippian(?) Shublik formation l (see p. 621) Totatlanika schist l Triassic or older Upper Mississippian Perseverance slate 1 Calico Bluff formation ' Paleozoic, Cretaceous, and Tertiary Mission Creek series 1 Lower Mississippian Paleozoic and Mesosoic Circle volcanics 1 fSunrise group * or series * Mississippian (probably Lower Mis­ Paleozoic and infolded Triassic(?) sissippian) Clark Peak schist l group 1 Paleozoic (see also Precambrian or Devonian and Mississippian Paleozoic; and Precambrian Noatak sandstone (as formation l) and Paleozoic) Devonian, Mississippian, and Eanuti group 1 Silurian (?) Paleozoic(J) and Tertiary (?) fFickett series 1 Finger Bay volcanics 2 Devonian (see Silurian, Devonian, Paleozoic(f) and Carboniferous', and Lower Esther granite 1 and Upper Ordovidan, Siluri­ Sheep Bay granite 1 an, and Devonian) 434 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Alaska Continued Alaska Continued Devonian (f) Precambrian, Cambrian(?), and fKasaan greenstone l Lower Ordovician Kuzitrin formation 1 fTatalina group J Upper Devonian or Mississippian Precambrian West Fork formation l Creek schist l Upper Devonian Fortymile granite l Kanayut conglomerate (A. L. Nilkoka group 1 Bowsher and J. T. Dutro, Jr., fTanana schist J 1957, U.S. Geol. Survey Prof. Yukon group l Paper 303-A, pt. 3, p. 3, 5, Age(?) 7-12, figs. 2, 3, 4.) Coast Range diorite * Stuver member (of Kanayut Copper Mountain greenstone or conglomerate); (as series l) amphibolite schist J Upper Devonian or older St. Elias schist l Neurokpuk formation (as schist') Arizona Middle Devonian Cenozoic Salmontrout limestone 1 Bonita Park formation 2 Takotna formation J Cave Creek formation 2 Vallenar formation l Faraway Ranch formation 2 Woodchopper volcanics l Rhyolite Canyon formation 2 Pre-Devonian series (see p. 622) Mentasta schist J Cenozoic(?) Silurian, Devonian, and Car­ Atascosa formation 2 boniferous Blacktail formation 2 Tonzona group l Montana Peak formation 8 Quaternary Silurian gravel * fBettles group l or series J Cameron beds (of Tolchaco Skajit limestone l gravels) * Tolovana limestone ' Jeddito formation 2 Middle or Upper Silurian Naha formation 2 Holitna group 2 Robbers Roost gravel 2 Post-Ordovidan (?) Tolchaco gravels 2 Hurrah slate J Tsegi formation 2 Puckmummie schist l Pleistocene Ordovician, Silurian, and Dev­ Chemehuevi formation (as grav­ onian (?) el !) fKugruk group 1 Pleistocene, lower Terra Cotta series 1 Temple Bar conglomerate 1 Ordovician and Silurian F^re-Pleistocene Porcupine group l Frazier Well gravel 2 Ordovician and Silurian(f) Tertiary or Pleistocene Tatina group l Cornfield series l Ordovician(?) Ganado series l Sowik limestone l Sunrise Springs series 1 Middle Ordovician White Cone series J Creek volcanics 1 Tertiary (see also Cretaceous or Tertiary) Lower and Upper Ordovician, Silu­ Beehive rhyolite 2 rian, and Devonian Big Wash andesite 2 Port Clarence limestone 1 Bull Mountain andesitic series 2 Pre-Ordovician to Devonian Camelback formation 2 group J Cat Mountain rhyolite 8 Pre-Ordovician (?) Galiuro rhyolite l Solomon schist 1 Kingman series 2 Precambrian or Paleozoic Murdock breccia 1 Casadepaga schist 1 Rillito andesite 2 Precambrian and Paleozoic Safford dacite 2 tPortymile group or series l Saflford tuff 2 fKotlo series J Shorts Ranch andesite 2 fNasina group J or series 1 Warrens Ranch latite 2 Precambrian and Lower Cambri­ Tertiary(?) an (?) Antelope rhyolite 1 Tindir group * Whitetail conglomerate * INDEX TO THE GEOLOGIC NAMES OF NOBTH AMERICA 435

United States Continued United States Continued Arizona Continued Arizona Continued Tertiary(?) (pre-Pliocene) Cretaceous or Tertiary Tassai Wash group 2 Sugarloaf quartz latite (seep. 622) Probably Tertiary Cretaceous or lower Tertiary Schultze granite 1 Bronco volcanics 2 Tertiary, upper Cretaceous Greggs breccia J Recreation red beds 2 Nogales division J Cretaceous(?) Tertiary, middle or upper Canelo redbeds 2 Alcyone trachyte ! Upper Cretaceous or Tertiary Cottonwood rhyolite 1 Schieffelin granodiorite 2 Esperanza trachyte l Upper Cretaceous or lower Tertiary Flag Spring trachyte l Solitude granite l Gold Road latite ' Uncle porphyry 2 Meadow Creek trachyte 1 Willow Spring granodiorite (as Moss porphyry ' granite l) Oatman andesite 1 Upper Cretaceous Sitgreaves tuff J Amole arkose 2 Times porphyry 1 Fort Buchanan formation 2 Tertiary, middle (?) Fort Crittenden formation 2 Ajo volcanics 3 Orabai sandstone J Daniels conglomerate 2 Pinkard formation 1 Locomotive fanglomerate 2 Santa Cruz group 2 Sneed andesite 2 Sonoita group 2 Tertiary, lower (?) Zilhlejini formation J Cornelia quartz monzonite 2 Upper Cretaceous (?) Granite Mountain porphyry l Concentrator volcanics 2 Teapot Mountain porphyry l Lower Cretaceous Pliocene(?) or Pleistocene Arkill limestone (in Saavedra Verde formation 1 member of Lowell formation) 2 Pliocene and Pleistocene Baga shale and limestone (in Gila conglomerate l Joserita member of Lowell San Pedro Valley formation 2 formation) 2 Pliocene Barata limestone (in Saavedra Bidahochi formation l member of Lowell formation) 2 San Pedro group 2 Barberian series 2 (?) Pliocene Bis bee group ' Batamote andesite 2 Black Knob dolomite (in Pacheta Childs latite 2 member of Lowell formation) 2 Hualpai limestone 2 Black Knob quartzite (in Pacheta Pliocene, upper (?) member of Lowell formation) 2 Sandtrap conglomerate 2 Chapparal sandstone (in Sa­ Pliocene, lower or middle avedra member of Lowell for­ Milk Creek beds 3 mation) 2 (?) Pliocene, lower Cholla member (of Lowell for­ Chapin Wash formation 2 mation) 2 Cobwebb basalt 2 Cienda limestone (in Pacheta Miocene, upper member of Lowell formation) 2 Duncan group 2 Cintura formation l Eocene (?) to lower Pliocene (?) Cinturan series l Stronghold granite 2 Cochise l Eocene, lower(?) Corta sandstone (in Joserita formation 2 member of Lowell formation) 2 Laramide Dixie shale J Amole granite 2 Espinal grit (in Joserita member Amole latite 8 of Lowell formation) 2 Amole quartz monzonite 2 Forrest shale J Mesosoic Glance conglomerate ' Oro Blanco conglomerate 2 Hay Flat limestone 2 Mesozoic(f) Joserita member (of Lowell for­ Chico Shunie quartz monzonite mation) 2 Ithaca Peak granite 2 Lancha limestone (in Pacheta Pajarito 2 member of Lowell formation) 2 Mesozoic, lower(?) Lowell formation 2 Lost Gulch monzonite l Mexican sandstone l 504835 69 3 436 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Arizona Continued Arizona Continued Lower Cretaceous Continued Lower Triassic Continued Molly Gibson formation 2 Rock Canyon conglomerate mem­ Mule sandstone l ber (of ) 1 Mural limestone 1 Salt Creek member (of Moenkopi Muralian series l formation) l Outlaw formation 2 Tanner shale l Pacheta member (of Lowell for­ Tolchico shale J mation) 2 Winslow member (of Moenkopi Patagonia group 2 formation) 2 Pedregosa member (of Lowell Winslow shale J formation) 2 Wupatki member (of Moenkopi Perilla member (of Lowell for­ formation) 2 mation) 2 Permian (see also Pennsylvania and Quajote member (of Lowell for­ Permian) mation) 2 f Aubrey limestone * Quimbo dolomite (in Joserita fAubrey sandstone J member of Lowell formation) 2 Chiquito * Saavedra member (of Lowell for­ Chiricahua limestone l mation) 2 Coconino sandstone 1 Sacramento Hill porphyry 2 Colina limestone 2 Tusonimo limestone (in Pacheta Concha limestone 2 member of Lowell formation) 2 De Chelly sandstone member Lower Cretaceous (?) (of ) *; lo­ Contention series l cally sandstone in Arizona Herschel quartzite 1 Epitaph dolomite 2 Randolph limestone J Esplanade sandstone member Toughnut series * (of Supai formation) J Jurassic Fort limestone (in Supai Arido sandstone l formation) l Lohali sandstones l Havasupai sandstones J Nutrian series J shale l Tyende sandstone * Eaibab limestone ' Eanishba beds (in Supai forma­ Jurassic and Jurassic(?) tion) i 1 t Monument Valley shale * Jurassic and older (?) Rainvalley formation 8 f Painted Desert formation l Scherrer formation 2 Jurassic(f) SeUgman limestone l t White Mesa sandstone l Shiwits shale l Upper Jurassic Snyder Hill formation l Cow Spring sandstone 2 Toroweap formation 2 Lower Jurassic(?) Wompats limestone l ' Yampai sandstone l Upper Triassic Lower Permian ' Pakoon limestone 2 fLeroux formation J Queantoweap sandstone a Nazlini shales l Carboniferous Newspaper Rock sandstone 2 Aubreyan series * Ventana sandstones l Kanab limestone x Upper Triassic(?) Malagan series 2 Dinosaur Canyon sand­ Mescaleran series 2 stone member (of Moenave Supaian series J formation) 2 Tusayan series * Moenave formation 2 Verdan series l Lower and Middle(f) Triassic Pennsylvanian and (or) Permian Moenkopi formation 1 Amos Wash member (of Supai fMoenkopian series * formation) 2 Lower Triassic Corduroy member (of Supai Adamana shales l formation) 2 Agathla sandstone 1 Pennsylvanian and Permian Agathla shale J Andrada formation 2 Holbrook sandstone l Aubrey group 1 Moqui member (of Moenkopi Naco limestone,1 formation, or formation) 2 group INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 437

United States Continued United States Continued Arizona Continued Arizona Continued Pennsylvanian and Permian Con. Ordovidan(f) Supai formation J Lucky Cuss limestone 1 Pennsylvanian (see also Misissip- Upper Cambrian and Lower Or- pian and Pennsylvanian) dovician fGaliuro limestone J Longfellow limestone l Horquilla limestone 2 Upper Cambrian Oak Creek member (of Supai t Apache sandstone l formation) 2 Copper Queen limestone l Packard Ranch member (of Supai Coronado quartzite l formation) 2 Peppersauce Canyon sandstone l Pennsylvanian(f) Rincon limestone J Huethawali limestone l Middle or Upper Cambrian Pierce shales l fEmerald limestone 1 Upper Pennsylvanian {Emerald series J Earp formation 2 Middle and Upper Cambrian Mississippian and Pennsylvanian Abrigo limestone 1 or formation Tuje Spring limestone l Middle Cambrian Mississippian Elden limestones J fAjax quartzite l fGray Cliff limestone l Bright Angel shale : Simon limestone 1 Bolsa quartzite l Truxton limestone 1 Chediski white sandstone mem­ Upper Mississippian or Lower ber (of quartzite) l Pennsylvanian(?) Cochise formation J Black Prince limestone 2 fDragoon quartzite 1 U pper JxL issTSSzppian Havasu member (of Muav for­ Paradise formation l mation) 2 Lower Mississippian and Lower Mead limestone 2 Pennsylvanian Muav limestone 1 fTornado limestone l Pima sandstone J Lower and Upper (?) Mississippian Santa Catalina formation 1 Escabrpsa limestone l Southern Belle quartzite l Lower Mississippian Tonto group 1 Modoc limestone 1 fTonto limestone l Redwall limestone 1 fTonto sandstone l Devonian and Carboniferous JTonto shale l fGlobe limestone J Tontoan series ' Devonian Troy quartzite i East Verde limestone a Yaquian series a Escacado limestone 2 Whetstonian series 2 Espinal formation 2 Lower and(or)-Middle Cambrian O'Carroll member (of Martin tongue 2 limestone) 2 Elves Chasm tongue 2 Patagonia h'mestone 2 Flour Sack member (of Bright Picacho de Calera formation l Angel shale) 2 Tombstonian series 2 Garnet Canyon tongue 2 Vecol limestone a Gateway Canyon member (of Upper Devonian Muav formation) 2 Crook formation 2 Kanab Canyon member (of Island Mesa beds * Muav formation) 2 Jerome formation * Lava Falls tongue 2 Martin limestone 1 in southeast Meriwitica tongue 2 Arizona; as formation in north­ Parashant tongue 2 east Arizona; and as Middle (?) Peach Springs member (of Muav and Upper Devonian formation formation) 2 in central Arizona. Rampart Cave member (of Muav Morenci shale 1 formation) 2 Mount Elden formation 2 Sanup Plateau member (of Muav Sycamore Creek sandstone * formation) 2 Upper(f) Devonian Spencer Canyon member (of Temple Butte limestone 1 Muav formation) 2 Middle(f) Devonian Tincanebite tongue 2 Santa Rita limestone 1 Lower Cambrian Santa Ritan series l Tapeats sandstone 1 438 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Arizona Continued Arizona Continued Precambrian Precambrian Continued Aguja sandstone 2 Yeager greenstone 2 Alder group 2 Zoroaster granite 2 Apache group l Precambrian(?) f Arizona slates * Cardigan gneiss 2 Barnes conglomerate l Chloride granite2 Bass limestone l Age(?) Bradshaw granite ' Luck-Sure series l Carbon Butte shales 2 Mesa formation 1 Cardenas lava series 2 Ruby diorite 2 Cerbat complex 2 Ruby Road formation 2 Chuar group 1 Silver King quartz monzonite Chuarian series l porphyry 2 City Creek series 2 Tappan lava flow 2 Cleopatra quartz porphyry 1 Chiquito sandstone 2 Arkansas Crooks complex ' Quaternary Deadman quartzite 2 Plateau gravel phase J Deception porphyry l Pleistocene Diana granite 2 Carrigan black sands l Dox sandstone J Center Point division J Dripping Spring quartzite l Prairie d'Ane clay l Echo limestone or formation Prairie de Roan division 1 Final shales 2 loess l fGrand Canyon group J White Prairie d'Ane clay 1 fGrand Canyon schist l Eocene Grand Canyon series ' Cleveland County red lands J Gunther dolomite 2 L'Eau Frais shale l Hakatai shale l Little Missouri lignites or ligne­ Hotauta conglomerate l ous shales l Katherine granite 1 Manchester shale 1 Jupiter shales 2 Eocene, upper Kwaguntan series 2 Caney Point marl member (of Madera diorite l White Bluff formation) 2 Marble limestone 2 Marks-Mills red beds J Maverick shale 2 Pastoria sand member (of White Mazatzal quartzite 1 Bluff formation) 2 Mescal limestone 1 Redfield formation 2 Mount Ord pyroxenite 2 Rison clay member (of White Nankoweap group 2 Bluff formation) 2 Newberry formation 2 White Bluff marl l Nunkoweap sandstone 2 Cretaceous Oracle granite 2 Brazil Branch breccia l Oso beds 2 Centerpoint volcanic facies (of Oveja formation 2 Eagleford formation) 2 migmatite 2 Upper Cretaceous and Eocene Final schist 1 fCamden series J Pine Mountain porphyry * Upper Cretaceous Pioneer shale l Arkadelphia clay 1 Red Rock rhyolite 2 Arkadelphia marl l Roosevelt member 2 fBig Decipher calcareous sands l Ruin granite l fBig De Gray horizon l Santa Catalina gneiss J fBingen formation or sand l Scanlan conglomerate 1 Brownstown marl : or formation Shea diabase 2 Buckrange sand lentil (of Ozan Shinumo quartzite 1 formation) l Solitude limestone 2 fClark County littorals 1 United Verde diorite J fColumbus marl l Unkar group l Grain sand l (subsurface) Venus formation 2 Graves sand l (subsurface) Vishnu schist l Gregory sand l (subsurface) Vishnuan series l fHigh Bluff blue sands 1 Walhalla formation 2 fHigh Bluff 1 Yavapai schist l or series Koster joint clays * INDEX TO THE GEOIX)GIC NAMES OF NORTH AMERICA 439

United States Continued United States Continued Arkansas Continued Arkansas Continued Upper Cretaceous Continued Pennsylvanian Continued Louann sand 1 (subsurface) Belva shale J Marlbrook marl 1 Booneville stage J Meakin sand l (subsurface) Cabin Creek sandstone l (sub- Morris Ferry greensand J surface) Nacatoch sand 1 Cross Plains sandstone J Ozan formation l Danville stage J Primm sand J (subsurface) fFork Mountain slate * fRocky Comfort chalk J fFort Smith formation J Saratoga chalk 1 Greenwood sandstone l Tokio formation * Hartwell sandstone l fTokio sand member J (of Bing- fNorristown stage J en formation) Ozark sandstone l t Washington greensand l fParis shale * fWhite Cliffs chalk » Parker Hill sandstone member Probably Middle Cretaceous (of Stanley formation) 2 Opello breccia J fPolk County ash bed (in Stan­ Lower Cretaceous ley shale) 1 Cerro Gordo clay J 1 Poteau stage l Delight sand 8 Sebastian stage J DeQueen limestone (as member Spadra shale l of Trinity formation ') Tennessee sandstone * Dierks limestone (as lentil of Tomlinson shale l Trinity formation l) fTomlinson stage 1 Ferry Lake anhydrite l (sub­ Washburn sandstone l surface) fWashington shale and sand­ Holly Creek formation (as clay l) stone J James limestone * (subsurface) fWinslow formation 1 J (limestone) Pennsylvanian (?) Mooringsport formation 2 (sub­ Gilbert shale » surface) Pennsylvanian (Atoka) gravel (as member of Greenland sandstone member Trinity formation J) (of Atoka formation) 2 Pine Island shale 3 (subsurface); Pennsylvanian (Morrow) shale member (of Pearsall Bloyd shale 1 or formation formation in south Texas) 2 Brentwood limestone member Ultima Thule gravel member (of Bloyd shale) 1 (of Holly Creek formation); Cane Hill member (of Hale (as lentil of Trinity formation J) formation) 2 Upper Little River limestone J Gap Ridge sandstone member Upper Jurassic (of Stanley shale) 8 Buckner member (of Haynesville Hale formation1 ; fmember (of formation) 2 (subsurface); for­ ) l mation in Mississippi 2 Eessler limestone member (of Dorcheat member (of Schuler Bloyd shale) 1 formation) 2 (subsurface) Morrow series (as group or Schuler formation 2 (subsurface) formation :) Smackover formation 2 (sub­ Prairie Grove member (of Hale surface) formation) 2 Wesson tongue 2 (of Dorcheat Woolsey member (of Bloyd member of Schuler formation) shale) 2 (subsurface) Mississippian and Pennsylvanian Permian fBpston group J Louann salt * (subsurface) Mississippian Norphlet formation 2 (subsurface) fCarrollton limestone J Werner formation 2 (subsurface) Dotson black sheety shale 1 Permian(f) Hatton tuff lentil (of Stanley Eagle Mills formation 2 (sub­ shale) l surface) Hot Springs sandstone l Carboniferous f Marshall shale J Yellian series J St. Joe limestone member (of Pennsylvanian Boone formation) l Appleton stage 1 fSpring Creek limestone (in fArkansan series * Moorefield shale) l 440 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Arkansas Continued Arkansas Continued Mississippian Continued Lower and Middle Ordovician fWyman sandstone J fCaddo shale 1 \J pper J\2 ISSTSSIppian flzard limestone J Batesville sandstone l fOuachita shale l Fayetteville shale J Womble shale ' or formation; Hindsville limestone member (of schistose sandstone in Okla­ Batesville sandstone) 1 homa Moorefield formation (as shale1) Lower Ordovician Pitkin limestone 1 Big Buffalo series 1 Ruddell shale 2 Black Rock formation ' Wedington sandstone member Blakely sandstone 1 (of Fayetteville shale) l Bull Mountain chert beds Lower and Upper Mississippian (in Powell dolomite) 8 Boone formation,1 limestone ' Cotter dolomite 1 Devonian and Pennsylvanian Jenkins Branch chert bed (in t formation J Cotter formation) 2 Devonian and Mississippian Mazarn shale l Arkansas novaculite 1 Powell limestone or dolomite 1 Devonian(?) Smithville formation ' Caddo Gap novaculite l fYellville limestone l fEureka shale J Cambrian fNoel shale J Collier shale ' Sylamore sandstone member (of California Chattanooga shale) J Quaternary (see also Tertiary or Middle Devonian Quaternary; and Pliocene, up­ Clifty limestone 1 per, and Quaternary) Lower or Middle Devonian Bay mud 2 Penters chert J Bodega Bay deposits 1 Silurian Boggs Mountain flows s fCason limestone l Burnt Canyon breccia 2 Lafferty limestone 1 Cabezon fanglomerate l St. Clair limestone 1 China Ranch beds a fSlatington shale * Clear Lake volcanic series (J. C. Upper Silurian Brice, 1953, Calif. Div. Mines Missouri Mountain slate or Bull. 166, p. 12, 34^35) shale 1 Cobb Mountain volcanics 2 Lower Silurian Deep Canyon fanglomerate * Heights fanglomerate x Blaylock sandstone * Kagel fanglomerate J Ordovician Konocti volcanics 2 Buffalo group * Lindavista terrace material 1 fKey sandstone * Lopez fanglomerate J Ordovician(f) Perini Hill flows 2 Crystal Mountain sandstone 1 Posey formation 2 Upper Ordovician Quaternary(f) fBatesville ash bed 1 Atlas formation l Cason shale * Cable formation or lake beds l Polk Creek shale l Tank volcanics l Middle and Upper Ordovician Tehachapi formation J fPolk Bayou limestone 1 Recent Middle Ordovician Big Glass Mountain complex l Bigfork chert l Burnt Lava flow 2 Calico Rock sandstone member CaUahan flow 2 (of ) J Cucamonga fan deposits 2 Everton formation (as limestone1) Glass Mountain lava 2 Jasper limestone 1 member (of Hat Creek basalt 2 Everton formation) Hoffman flow 2 Kings River sandstone member Medicine flow 2 (of Everton formation) J Modoc basalt l Newton sandstone member (of Paint Pot Crater flow 2 Everton formation) 1 Plutos Cave basalt 2 Sneeds limestone lentil (of Ever­ Recent (?) ton formation) 1 Chalk Mountain dacite 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 441

United States Continued United States Continued California Continued California Continued Pleistocene and Recent Pleistocene, upper Continued Dos Picachos gravels 2 La Habra formation (as conglom­ Pleistocene or Recent erate1) Beehive Mesa alluvium 2 Lake Coahuila deposits 2 Paynes Creek basalt l Orcutt formation 1 or sand Pleistocene to Recent(f) Pacoima formation 2 Mount Hoffmann complex 2 Palos Verdes sand l Pleistocene Peckham formation 8 Aeolian Buttes till 2 Rohnerville formation 2 Alameda formation 1 San Dimas formation l Arroyo Seco gravel l Timber Canyon fanglomerate l Battery formation 1 Tomales formation * Bautista beds l Wilmington group l Bay Point formation 2 Pleistocene, upper(?) Bishop tuff 2 Nadeau gravel 2 Blackhawk breccia l Pleistocene, middle Brawley formation 2 Aromas red sands 2 Campus formation 1 Pleistocene, lower or middle Carpinteria formation l Leona rhyolite l Casitas formation 2 Pleistocene, lower Centinela gravels 1 Barlow Ranch beds 2 Clear Lake sediments l Fox Canyon member (of San Coahuila silt l Pedro formation) 2 Deadman Island beds l Grimes Canyon sand and gravel Dripping Springs formation 2 member (of Santa Barbara Huichica formation 2 formation) 2 June Lake basalt 2 Hall Canyon formation l Kalorama member l (of Las Lomita marl or member (of San Posas formation) Pedro formation); (as forma­ Klamath gravels 1 tion) 1 Las Posas formation 1 San Pedro sand l or formation Long Canyon member (of Las Signal Hill beds 2 Posas formation) l Tertiary or Quaternary Los Cerritos beds l Black Mountain basalt flow l Manix lake beds 1 Jacumba volcanics l Merritt sand l formation ! Millerton formation 1 Tolenas marble l Mono Craters obsidian 2 Tertiary Montezuma formation 2 fLang division l Nigger Canyon volcanics 2 Meyer oil zone l (subsurface) Pala conglomerate l Skooner Gulch basalt 2 Pauba formation 2 Warner basalt l Pie Knob andesite * Wymer beds l Pinto formation l Tertiary(?) Pittsburg formation 2 Sulphur Springs Mountain ande­ Red Bluff formation 1 site 2 Red Shale Butte complex 2 Tertiary, upper San formation l Butte gravel l member (of Sutter San Benito gravels l formation) Santa Cruz Island formation l Sutter formation 1 Shoemaker gravel 2 Tertiary, lower Temecula arkose 2 Grapevine conglomerates l Temescal formation 1 Pliocene to Recent Timms Point silt or silt member High Cascade series 2 (of San Pedro formation); (as Pliocene or Pleistocene formation *) Tassajero formation l Tomales Bay deposit l Pliocene and Pleistocene Victor formation 1 Carlotta formation 2 Pleistocene and Pliocene(?) Packwopd gravels 2 Glen Ellen formation 2 San Jacinto series l Schumann formation l Santa Clara formation * Pleistocene, upper fSanta Maria formation * Harold formation 2 Saugus formation 1 Hookton formation * Ventura sands l 442 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued California Continued California Continued Pliocene and later (?) Pliocene Continued Kern River group, formation, or Siesta formation 1 L'- series l Sonoma tuff l Pliocene and Pleistocene(?) l McKittrick group (as formation1) Stony Creek basalt 2 1 Sunshine Ranch member (of 2 Saugus formation) 2 Pliocene and Pleistocene, lower Supan tuff and sand member Alamitos zone l (subsurface) (of Tuscan formation) 2 zone l (subsurface) Tehama formation 1 Bixby zone l (subsurface) Truckhaven rhyolite 2 Booth zone l (subsurface) Tuscan formation (as tuff ') Brown zone l (subsurface) Wildcat series 1 (as group1) Wilson Ranch beds l Wilbur zone l (subsurface) Wolfskill formation 2 Pliocene and Pleistocene, lower(?) Pliocene(f) Paso Robles formation 1 Cuyama formation 1 Pliocene (see also Miocene and Duarte conglomerate 2 Pliocene; and Miocene or Plio­ Funeral fanglomerate (as con­ cene) glomerate l) Alamo formation 2 Kettleman lake bed l Asphalto lake bed l Laguna formation 1 Bald Hill agglomerate member Lake basalt 2 (of Tuscan formation) 2 Ridge Route formation 2 Bald Peak basalt l Saddleback basalt 2 Berkeley group 1 San Mateo formation * Buckbee oil zone l (subsurface) Sweitzer formation 2 Canebrake conglomerate 3 fTassajara lake(?) bed 1 Chanac formation l Pliocene, upper, or Pleistocene, lower Clarke oil zone l (subsurface) Cache formation 1 fContra Costa lake bed 1 2 1 Hathaway formation l Falor formation 2 Ocotillo conglomerate 2 fGrizzly Peak andesite 1 Pipes fanglomerate 1 Horsethief formation 2 Pliocene, upper, and Quaternary Iron Canyon agglomerate mem­ Bitterwater formation 2 ber (of Tuscan formation) 2 Pliocene, upper King City formation 3 Alturas formation l Mark West andesite l Borrego formation 2 Moraga formation 1 or tuff Careaga sand or sandstone 2 Mount Eden formation l Cascajo conglomerate member Nordstrom oil zone 1 (subsurface) (of ) 2 Northbrae rhyolite l Cebada fine-grained member (of O'Connell oil zone l (subsurface) Careaga sandstone) 2 Orinda formation ' Corcoran clay member (of Tulare Paicines formation 1 formation) (subsurface) (J. W. Painted Hill formation 3 Frink and H. A. Kues, 1954, Petaluma formation 1 Am. Assoc. Petroleum Geol­ 1 ogists Bull., v. 38, no. 11, Pinole tuff 1 p. 2357-2371) Piutean series 1 Ferndale sandstone 2 Purisima formation l Graciosa coarse-grained member Putnam Peak basalt 2 (of Careaga sandstone) 2 Sacramento tuff and sand mem­ Hungry Valley formation 2 ber (of Tuscan formation) 2 Livermore gravel l St. George formation 1 Nomlaki tuff member (of Tehama St. Helena rhyolite 1 member and Tuscan formations) l (of Sonoma volcanics) San Joaquin formation * San Ardo group 2 Santa Barbara formation (as l beds 0 Santa Ana sandstone l San Timoteo beds l Seven-Mile tuff and sand mem­ Scotia Bluffs sandstone 2 ber (of Tuscan formation) 2 Pliocene, middle or upper Shasta lavas 2 Camulos formation l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 443

United States Continued United States Continued California Continued California Continued Pliocene, middle and upper Miocene and Pliocene Continued Rio Dell formation 2 Mehrten formation l Pliocene, middle(?) and upper Pismo formation 1 Foxen mudstone (as formation l) Quarry conglomerate 2 Pliocene, middle (see also Miocene, Sycamore conglomerate 2 upper, to Pliocene, middle) Todos Santos claystone member Peace Valley beds 2 (of Sisquoc formation) 2 Piru sandstone 2 Turnbull conglomerate 2 Pliocene, lower and middle Violin breccia 2 Anaverde formation 2 Workman Hill conglomerate 2 Mulholland formation 2 Miocene Oro Loma formation 2 Alverson andesite lava 2 Tinaquaic sandstone member (of series l Sisquoc formation) 2 Bena gravels 2 Pliocene, lower (see also Miocene, Blanca tuff 1 upper, and Pliocene, lower) Carneros sandstone member * (of Avawatz formation 2 ) Bennett formation 2 fCarrizo formation l Bolsa zone J (subsurface) Casmalia gypsiferous shale or red Diablo formation 2 beds 1 Eden beds * Castaic formation 2 Eel River formation 2 Cedarville andesite l Elsmere member (of Repetto Cedarville series l formation) 2 Conejo volcanics 1 Gosnell shale * (subsurface) El Modena volcanics 2 Green Valley formation 2 Elsinore sand l (subsurface) Jacalitos formation 1 Fish Creek gypsum 2 Lawlor tuff 2 Friant formation 2 Lloyd zone * (subsurface) Galloway beds 2 Los Medanos formation 2 Glendora volcanics 2 Lost Conglomerate member (of Hay Fork beds l ) 2 Harris formation 1 Napa Valley series 2 Hyampom lake beds : fRed Rock Canyon beds l Jewett sand and silt 1 (subsurface) f Repetto formation 1 or silt- Jewett silt member 1 (of Temblor stone l formation) (subsurface and Ricardo formation 1 surface) Tolay volcanics 1 Johnson gravels x Pliocene and Miocene (?) Kirkers Pass beds l Poncho Rico formation 1 Mecca formation 2 Pliocene, lower, and Miocene(f) Media shale 1 Santa Paula formation 1 Olcese sand 2 (subsurface) Post-Miocene(f) Pasadena formation 1 Amargosa chaos 2 Poso Creek sand l (subsurface) Calico phase (of Amargosa Quercan sandstone l chaos) 2 Redhill sandstone l Jubilee phase (of Amargosa Round Mountain silt l (subsur­ chaos) 2 face and surface) Virgin Spring phase (of Amargosa Tequepis sandstone l chaos) 2 Walker formation 1 (subsurface Miocene to Pleistocene(f) and surface) Mud Hill series l Walker Plain basalt 2 Miocene, Pliocene, or Pleistocene Miocene(?) Wimer beds * Bouquet Cafion breccia 1 Miocene or Pliocene Dos Palmas rhyolite 2 Furnace Creek formation 2 fEscondido series 1 Greenwater volcanics 1 Fountain Peak rhyolite 2 tRainbow beds 1 Furnacean series : San Pedro schist breccia and Laird sandstone 2 sandstone 1 Millet clay l Miocene and Pliocene Negra clay l Bartolo conglomerate 2 Pinnacles formation 2 fCoalinga beds 1 Potato sandstone l Crescent City beds l 444 GEOLOGIC NAME® OF NORTH AMERICA

United States Continued United States Continued California Continued California Continued Miocene(?) Continued Miocene, upper Continued fRosamond series l Red Rock Canyon sandstone Valley Springs formation 1 member (of Santa Margarita Miocene, upper, and Pliocene, lower formation) l l Reef Ridge shale 1 French Flat sandstone 2 St. Paul sand 1 (subsurface) Ridge Basin group 3 San Pablo group 1 or formation l Towsley formation 2 Santa Margarita formation (as Miocene, upper, to Pliocene, middle sandstone 0 Contra Costa group 8 fSoledad divisions l Sisquoc formation 1 Soquel member (of Puente for­ Miocene, upper, to Pliocene, lower (?) mation) 2 Pullen formation 2 Sycamore Canyon member (of Miocene, upper Puente formation) 2 Antelope shale member (of Mon- Tice shale 1 terey formation) 8 tTrampan formation l Apache formation 2 Valmonte diatomite member (of Belridge diatomite 2 Monterey shale) l Blanco sandstone (in Puente for­ Yorba member (of Puente forma­ mation) 2 tion) 2 Bopesta formation * Whiterock Bluff shale member Briones sandstone l (of Santa Margarita forma­ Central Fee unit (in Sycamore tion) 1 Canyon member of Puente (f) Miocene, upper formation) 2 Nova formation 2 Cierbo sandstone 1 Miocene, middle or upper Cubierto shale (in Puente forma­ Coachella fanglomerate 1 tion) * flndio formation l Hercules shale member (of Palm Spring formation l Briones sandstone) 1 ; (see also Miocene, middle and upper fHerculean shale member l) Alt amir a shale member (of Mon­ Hoover conglomerate unit (in terey shale) l Sycamore Canyon member of Alverson Canyon formation a Puente formation) 2 1 Hunter sandstone and conglom­ fMaricopa shale 1 erate (in Puente formation) 2 Monterey group,1 formation, or Kramer Lake beds (in Ricardo shale formation) 2 Twisselmann sandstone member La Vida member (of Puente for­ (of Monterey formation) 2 mation) 2 Miocene, middle McDonald shale member (of Alferitz formation 2 Monterey formation) 2 Big Blue serpentinous member McLure shale member (of Mon­ (of Temblor formation) l terey formation) l Buzzard Peak conglomerate Mahala sandstone and conglom­ member (of Topanga forma­ erate 2 tion) 2 Malaga mudstone member (of Caliente formation 2 Monterey formation) 1 Claremont shale 1 fMellenia series * Escudo sandstone * Mint Canyon formation 1 Felix siltstone l (subsurface) l Gould shale member (of Mon­ Mohawk lake beds l terey shale) 1 Morales member (of Santa Mar- Hambre sandstone l garita formation) l Hollycrest formation 2 Neroly formation l or sandstone Kinnick formation 1 Papel Blanco shale 2 Miraleste tuff bed l (in Altamira Peculiar shale (in Puente forma- shale member of Monterey shale) mation) 2 tOcoya Creek beds 1 Point Arena beds 2 Oursan sandstone ' Puente formation l Point Sal formation 2 Punchbowl formation 2 Portugese tuff bed l (in Altamira Quatal red clay member (of Santa shale member of Monterey Margarita formation) l shale) Red Mountain andesite 1 Rench sand 1 (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 445

United States Continued United States Continued California Continued California Continued Miocene, middle Continued Oligocene Continued Rodeo shale l Pinecate formation 1 fSalinas shale l fPleito formation l San Onofre breccia l fSan Emigdio formation l Topanga formation * San Juan Bautista formation l Whepley shale l (subsurface) San Lorenzo formation 1 Miocene, middle(f) fSan Lorenzo series l Quien Sabe volcanics 2 San Ramon sandstone l Miocene, middle or older Simmler formation 2 Elephant Hill breccia 2 Tumey formation l [Johnstone] Johnson Peak tuff Oligocene(?) breccia 2 Lillis formation l Spadra felsophyre * Wagonwheel formation * Pre- Oligocene, lower Witnet formation l Titus Canyon formation l Miocene, lower and middle Eocene to Miocene, lower Sandholdt shale 2 Berry foimation 2 formation 8 Goler formation 2 Temblor formation l Eocene or Oligocene Miocene, lower (see also Eocene to Butano sandstone l Miocene, lower) fCantua shale l Agua sandstone member (of Eocene to Oligocene Santos shale) 1 Church Creek beds 2 fCoyote Mountain clays (in Eocene and Oligocene(?) ) 1 Gaviota formation 1 formation 2 Kreyenhagen formation (as Imperial formation 1 shale *) fLatrania sands 1 Eocene Lion sandstone 1 Alberhill clay 1 Obispo tuff member (of Monte- Arroyo Hondo formation 2 rey formation) 2 Arroyo Hondo shale member (of Painted Rock formation 2 Lodo formation) 3 Pato red member (of Vaqueros Avenal sandstone ' formation) l Ballena gravel 1 sand l (subsurface) Canoas siltstone member (of Rincon shale 1 or mudstone Kreyenhagen formation) * Santos shale > Cantua member * (of Lodo forma­ Sauer Dough sand l (subsurface) tion) Sobrante sandstone l Capita shale member (of Soda Lake formation 2 Domengine formation) 2 Tecuya beds * fCarquinez series l Tick Canyon formation 2 Chaney Ranch sandstone forma­ Tranquillon volcanics a tion 2 Vaqueros sandstone l or forma­ Coldwater sandstone member (of tion Tejon formation) 1 Vedder sand ' (subsurface) Cozy Dell shale a member (of Yuha reefs * Tejon formation) (?) Miocene, lower Creston (formation) a Catalina schist breccia l Delmar sand 1 Ilmon basalt 2 Dry Creek formation l Lospe formation 2 Dunns Peak sandstone 2 Oligocene and Miocene(f) Edwin clay l Artist Drive formation 2 Indarfc sandstone 2 Oligocene or Miocene, lower lone formation l Soledad group l Irvine shale (in Santiago forma­ Oligocene and Miocene, lower (?) tion) 2 Vasquez formation (as series l) Jameson shale member (of Mark- Oligocene (see also Eocene, upper, ley sandstone) 2 and Oligocene; and Eocene to Junipero sandstone 2 Oligocene) La Jolla formation 1 Alegria formation 2 Liveoak member (of Tejon Bealville fanglomerate a formation) 8 Concord formation 1 Lucia shale 2 Kirker tuff l 446 GEOLOGIC NAME© OF NORTH AMERICA

United States Continued United States Continued California Continued California Continued .-Continued Eocene, middle Continued Matilija sandstone member 1 (of Capay formation l Tejon formation) Domengine formation 1 or sand­ Metralla sandstone member (of stone Tejon formation) 2 Hawkhill formation 2 Montgomery Creek formation 1 Juncal formation 2 Nonada sand member (of Dom- LI a j as formation l engine formation) 2 Los Muertos Creek formation 2 Piru formation 2 Mabury formation 2 Ragged Valley shale member Muir sandstone 2 (of Arroyo Hondo formation) 2 Sacate formation 2 Reed Canyon silt member (of Santa Susana formation l Tejon formation) 2 Rose Canyon shale l Sisar black shale 2 Santiago formation 2 Tesla formation 2 fStewartsville group * Vacaville shale 2 The Rocks sandstone 2 Wheeler sandstone member (of fTopatopa formation l Juncal formation) 2 Torrey sand 1 Eocene, middle, to Oligocene, lower Tres Pinos sandstone l Reeds Creek andesite 2 Uvas conglomerate member (of Eocene, lower Tejon formation) 2 Las Juntas shale 2 Walkup clay l Marysville claystone member Weaverville formation l (of Meganos formation); (as Yokut sandstone 2 formation J) Eocene(?) Meganos formation 1 Carmelo series l Paleocene and Eocene Indian conglomerate l Cerros shale member (of Lodo fMohave formation 2 formation) 2 Mono shale l Laguna Seca formation 2 fSan Pedro shales l Lodo formation 2 Eocene, upper, and Oligocene Paleocene Sespe formation 1 Claymont clay bed (in Silverado Eocene, upper formation) 2 Alhambra formation 2 Dip Creek formation 2 Bear Canyon sandstone member Las Virgenes sandstone 1 (of Kreyenhagen formation) 2 Martinez formation 1 Castro shale member (of Al­ Serrano clay bed (in Silverado hambra formation) 2 formation) 2 Echo Falls shale 2 Silverado formation 2 Escobar sandstone 2 Simi conglomerate 1 Gredal formation 2 Vine Hill sandstone 2 Kellogg shale 2 Mesozoic and Tertiary Markley sandstone* member fChico-Tejon series 1 (of Kreyenhagen formation) fPescadero series l Nortonville shale member (of fSan Francisco group l Kreyenhagen formation) 2 fSan Francisco sandstone l Pereira shale member (of Al­ Mesozoic (see also Paleozoic and hambra formation) 2 Mesozoic) Point of Rocks sandstone 2 Courtney granite l Poway conglomerate 1 Indian Gulch l (formation) Roop sandstone member (of Mariposa group l Alhambra formation) 2 Mount Ord series 2 Sidney shale member (of Mark- Mesozoic(?) ley formation) 2 Little Chief porphyry l Sierra Blanca limestone 1 Mountain Meadows dacite por­ Tejon formation l phyry 2 Welcome formation 2 Ravenna plutonic series 1 Wheatland formation 2 Upper Mesozoic Eocene, middle Darwin quartz diorite 2 Anita shale 2 Coso granodiorite 2 Camino Cielo sandstone member Upper Mesozoic(?) (of Juncal formation) 2 Perris quartz diorite 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 447

United States Continued United States Continued California Continued California Continued Probably lower Mesozoic Upper Cretaceous Agua Fria * (formation) Antelope shale 2 Hunter Valley l (cherts) Asuncion group 2 Penypn Blanco agglomerate 1 fAtascadero formation l Mesozoic or older^ Baker Canyon conglomerate Catalina schist (as facies of member (of Ladd formation) 2 Franciscan series1) Big Oak Flat shale and sandstone Post-Cretaceaous member (of Panoche group) 2 Alum Rock rhyolite 2 Bonsall tonalite 2 Probably post-Cretaceous Butts Ranch shale member (of Rattlesnake granite * Panoche group)2 "Between late Cretaceous and Oligo- Call sandstone member (of cene" Panoche group) 2 Iversen basalt 2 Cantinas sandstone 2 Cretaceous or Eocene Chico formation or group l Osila sand 2 Chico Creek beds 2 Cretaceous and Paleocene(?) Debris Dam sandstone 2 Cima sandstone lentil (in Dos Dosados sand and shale member Palos shale member of Moreno (of Moreno formation) 2 formation) 2 Forbes formation 2 Dos Palos shale member (of Funks formation 2 Gaines group 2 Moreno formation) 2 Garzas beds 2 Cretaceous (see also Jurassic and Godfrey shales 2 Cretaceous; and Jurassic or Golden Gate formation 2 Cretaceous) Green Valley tonalite 2 Berryessa formation 2 Gualala series (see fWallala Domenigoni Valley granodiorite 2 beds 1 below) Escondido Creek leucogranodi- Guinda formation 2 orite 2 Holz shale member (of Ladd for­ Indian Mountain leucogranodi- mation) 2 orite 2 Jack Creek formation 2 Lakeview Mountain tonalite 2 Jalama formation a Lake Wolford leucogranodiorite 2 Joaquin Ridge sandstone member La Sierra tonaiite 2 (of Panoche formation) 2 Mount Hole granodiorite 2 Ladd formation 2 Roblar leucogranite 2 Los Banos Creek member (of San Mar cos gabbro 2 "Quinto B" reef beds) » fShasta-Chico series 1 Los Gatos beds 2 Trabuco formation 1 Marca shale member (of Moreno Woodson Mountain granodiorite 2 formation) 2 Cretaceous(f) Mercy sandstone lentil (in Tierra Cahuenga beds 2 Loma shale member of Moreno Griffith beds 2 formation) 2 Holcomb quartz monzonite 2 Mills formation 2 Novato conglomerate 2 Moreno Grande formation (N. L. Patrick greenstone l Taliaferro, 1944, Am. Assoc. Probably Cretaceous Petroleum Geologists Bull., v. Bridalveil granite l 28, no. 4. p. 472) granite 1 Mustang Creek formation 2 El Capitan granite 1 Oakland conglomerate member Half Dome quartz monzonite 1 (of Chico formation) l Johnson granite porphyry l Orestimba group 2 Leaning Tower quartz monzonite l Pacheco group 2 Mount Clark granite 1 Panoche formation 1 Pohono granodiorite l Paynes shale and sandstone mem­ Sentinel granodiorite 1 ber (of Panoche group) 2 Taft granite 1 Pendola shale 2 Tuolumne intrusive series 1 Piedras Altas formation 2 Upper Cretaceous or Tertiary, lower Pioneer group 2 Kingston Range monzonite por­ Pleasants sandstone member (of phyry 2 Williams formation) 2 Upper Cretaceous and Paleocene Quinto member (of Moreno Moreno formation or shale 1 group) 2 448 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued California Continued California Continued Upper Cretaceous Continued Jurassic and Cretaceous Continued Romero conglomerate (in Debris Marin sandstone 1 member (of Dam sandstone) 2 Franciscan formation) Salt Creek conglomerate 2 Sausalito chert 1 member (of Schulz Ranch sandstone member Franciscan formation) (of Williams formation) 2 Yager formation 2 Sites formation 2 Jurassic Sunol series 3 Amargo formation 2 Tierra Loma shale member (of Cove quartz monzonite 2 Moreno formation) 3 Elder Creek group 2 Venado formation 2 Grindstone group 3 Volta formation 2 Newville group 2 fWallala beds 1 or group l Plumas series l [Gualala correct spelling] Ship Mountain granite 2 Williams formation 2 Siskiyou granodiorite l Yolo formation 2 Jurassic(?) Upper Cretaceous(?) Atolia quartz monzonite l Cuyamaca gabbro (as basic in­ Bolinas sandstone l trusive 0 fBully Hill rhyolite » Pre-Upper Cretaceous Corral Hollow shales l Cucampnga complex 2 Gavilan Peak gabbro 2 Deer diorite 2 fGolden Gate series l Lower Cretaceous (see also Upper Lebec quartz monzonite 2 Jurassic or Lower Cretaceous) Liebre quartz monzonite 2 Cottonwood beds 3 Oakridge sandstone l Cnesta diabase 1 Osos basalt 1 fHeadlight porphyry 1 Pilarcitos sandstone l Horsetown formation 1 Pinyon Ridge granodiorite 2 Hulen beds a San Bruno sandstone l Marmolejo formation 2 tSan Luis formation l Paskenta formation l fSan Miguel cherts 1 Shasta series l Santiago Peak volcanics 2 fToro formation l School Canyon granite 2 Wisenor formation * fSilver Terrace sandstone l Pre-Cretaceous Stonewall quartz diorite 1 or Placerita formation l formation Rubio diorite and metadiorite l Tejon Lookout granite 2 San Gabriel formation 1 fTelegraph Hill sandstone l Santa Lucia granite or quartz Temescal Wash quartz latite diorite 2 porphyry 2 Tamarack formation ' Val Verde tonalite 2 fTrinity formation l White Tank monzonite 2 Pre-Cretaceous(f) Pre-Franciscan Feliz granodiorite 2 Bodega diorite 1 Lar quartz diorite a Coast complex i Vermont quartz diorite 2 Post-Franciscan Gabilan limestone 1 Rainbow series l Santa Lucia series 1 Walker Ridge sandstones l Upper Jurassic or Lower Cretaceous Walker Ridge shales 1 Alpine quartz diorite 1 Jurassic or Cretaceous Descanso granodiorite 1 San Jacinto granodiorite 2 Harbison quartz diorite l Jurassic and Cretaceous La Posta quartz diorite l Bonita sandstone 1 member (of Mount Lowe granodiorite l Franciscan formation) Cahil sandstone 1 member (of quartz diorite l Franciscan formation) Viej as gabbro-diorite l Calera limestone member Upper Jurassic or Lower Cretace­ Franciscan formation); ous (?) member of Cahil sandstone Bishop Creek granite 2 Espada formation 2 Upper Jurassic Franciscan formation l ; tgroup 1 Bicknell sandstone 1 Ingleside chert 1 member (of Bradley granodiorite 2 Franciscan formation) Colfax formation l INDEX TO THE GEOLOGIC NAMES OP NOKTH AMERICA 449

United States Continued United States Continued California Continued California Continued Upper Jurassic Triassic and Jurassic Combe sandstone l Milton formation 1 Cooks Canyon agglomerate 1 Probably Triassic and Jurassic Fargo Canyon diorite 2 Bean Canyon formation or series * Foreman argillite l Tuolumne group l Foreman formation * Triassic Hinchman sandstone 1 Bedford Canyon formation * Honda formation 2 Elsinore metamorphic series l Hull meta-andesite 1 Genesee Valley limestone and Inyo granite l shales l Knoxville formation l Santa Ana limestone * Lucky S argillite l Triassic(f) Mariposa slate 1 or formation Clear Creek volcanic series l Monte de Oro formation l Homer quartzite 2 North Ridge agglomerate l Kaweah series 2 Oroville beds l Lemon Cove schist 2 Victorville quartz monzonite 2 Mineral King beds 1 Upper Jurassic(?) Ord Mountain group * Bald Rock granite * Sanford quartzite a Bucks granodiorite 2 Santa Monica slate 1 Cactus granite l Sebrina complex 2 Cajalco quartz monzonite 1 Sidewinder volcanic series 2 Coxcomb granodiorite 2 Three Rivers schist 2 Estelle quartz djiorite l Yokohl amphibolite 2 Isabella granodiorite l Triassic(f) or older Lakeview quartz-hornblende di­ Julian schist l orite 1 Upper Triassic and Lower Jurassic Merrimac granodiorite 2 Canyon formation l fMontara granite * Probably Upper Triassic or Jurassic Parker quartz diorite 1 Black Mountain volcanics l Steele Valley granodiorite 1 Upper Triassic Temescal porphyry 1 Brock shale * Virginia quartz hypersthene Cedar formation 1 Virginia quartz hypersthene norite 1 Devils Canyon member (of Modin Middle or Upper Jurassic formation) 2 Cosumnes formation 2 Hawkins Creek member (of Mod­ Dufresne slate 2 in formation) 2 Logtown Ridge formation 2 Hosselkus limestone * Mountain Spring volcanics 2 Hosselkus series l Newton Mine volcanics 2 Kosk member (of Modin forma­ Sunnybrook volcanics 2 tion) i Middle and Upper Jurassic Modin formation 1 Amador group 2 Swearinger slate ' Middle Jurassic Trail formation 1 Hardgrave tuff 1 Middle and Upper Triassic Hull agglomerate l Pit shale l or formation Moonshine conglomerate l Mormon sandstone l Pitt series l fMorrison sandstone l Lower and Middle Triassic Thompson limestone 1 Inyo series l Thompson red shale l Lower Triassic Lower and Middle Jurassic Inyoan series l fBend formation l Paleozoic and Mesozoic Potent formation 1 Diamond Valley complex 2 Lower Jurassic Maria plutonic complex 2 Arvison formation 2 Pleasant View complex * Fant meta-andesite l Paleozoic(f) or Mesozoic(f) Hardgrave sandstone l Sacatar quartz diorite 2 Lilac argillite * Summit gabbro 2 Lower (?) Jurassic Paleozoic Bagley andesite 1 Furnace limestone 1 Jurassic or older Laurel Canyon formation 2 Kernville series l Paleozoic or older Pampa schist 2 Palm Canyon complex 2 450 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued California Continued California Continued Paleozoic or older Continued Pennsylvanian Continued Tumco formation 2 Robinson formation 1 Vitrefrax formation 2 Tihvipah limestone 2 Paleozoic(f) Pennsylvanian (?) Anzar phase (of Santa Lucia Rest Spring shale 2 series) l Mississippian and Permian(f) Chino Quarry limestone l f McCloud formation 1 Chino Quarry quartzite l Jurupa series l Arlington formation l Preston hornblende diorite 1 Baird shale : Sky Blue Quarry limestone l Bass Mountain diabase 1 Sur series 1 Blue Canyon formation 1 Upper Paleozoic or Triassic Bragdon formation 1 McCoy Mountains formation 2 Cape Horn slate 1 Upper Paleozoic f Caribou formation 1 Calaveras formation l Delhi formation 1 Sidewinder Valley metavolcanics 2 Duncan chert l Upper Paleozoic(?) Kanaka formation 1 Hodge volcanic series 2 Mass Mountain 1 (basalt flows) Waterman gneiss 2 Peale formation l Lower Paleozoic(f) Perdido formation 2 Death Valley formation 1 Relief quartzite l Hanaupah formation 1 Shoofly formation l Marvel limestone l fSpanish formation l ! Stewart Valley limestone 2 Mountain Girl conglomerate- Taylor meta-andesite 1 quartzite 1 Tightner formation 1 Radcliff formation l Tin Mountain limestone 2 Redlands limestone 1 Probably Mississippian Sentinel dolomite l Clear Creek greenstone l Sour Dough limestone * Clear Creek series 1 Surprise formation 1 Clipper Gap formation l Telescope group 1 Devonian Wildrose formation l Grayback formation 1 Permian Taylorsville formation l Dekkas andesite 1 Fairview Valley formation 2 Devonian(f) Garlock series 2 Chanchelulla formation l McCloud limestone 1 Copley greenstone (as meta- t McCloud shales 1 andesite J) Mokelumne formation 2 Middle(?) and Upper Devonian Nosoni formation ' Lippincott member (of Lost Burro Owens Valley formation (see p. formation) 2 621) Lost Burro formation 2 Owenyo limestone 1 member (of Middle Devonian Owens Valley formation) Balaklala rhyolite l Reward conglomerate 1 member Kennett formation 1 (of Owens Valley formation) fSacramento formation 2 Wildwood limestone 1 Pre- Devonian Lower Permian Kerr Ranch schist 2 Mount Edgar limestone 2 Silurian and Lower Devonian Carboniferous Hidden Valley dolomite 2 Hall City limestone 1 Silurian Nix porphyrite 2 Montgomery limestone l Carboniferous (f) Nordheimer formation 1 Silurian(f) Saragossa quartzite 1 Grizzly formation 1 Pre- Carboniferous (?) Pre-Silurian Chicopee formation 2 Abrams mica schist 1 Pennsylvanian Middle Ordovician fKeddie formation 1 Barrel Spring formation 1 Kettle meta-andesite 1 Lower Ordovician fLittle Grizzly Creek beds J Mazourka formation 1 Providence Mountains limestone 2 Post-Cambrian Reeve meta-andesite : Maria formation 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 451

United States Continued United States Continued California Continued California Continued Cambrian Precambrian(f) Continued Barrelian series 1 fKlamath schists l Panamintan series l Mesquite schist a Pintoan series 1 Pelona schist 1 Upper Cambrian Salmon hornblende schist 1 Nopah formation 2 San Emedio series 1 Middle and Upper Cambrian Siskiyou terrane x Racetrack dolomite 3 World Beater porphyry x Middle Cambrian and later (?) Cornfield Springs formation x Aurela Ridge group 2 Middle Cambrian Boundary Peak granite x Bonanza King formation 1 Brokeoff andesite 1 Cadiz formation x Carson Creek formation 1 Silver king dolomite member 1 Crescent Crater dacites x (of Bonanza King formation) Cucamonga Canyon group 2 Lower and Middle Cambrian Divide Peak andesite x Tecopa shale 2 Eastern l Lower Cambrian East Ridge group 2 Campito sandstone l El Dorado Ridge gneissose quartz Chambless limestone 2 diorite 2 Inyo marble x El Luis Ridge group 2 Kelso shale 2 Flatiron andesites 1 Latham shale 2 Huckleberry andesites 1 Mono series 1 Juniper andesites x Noonday dolomite 2 Lassen dacites x Oro Grande series x Loomis Peak dacites l Pandermitan series 1 Manzanita dacites x Tough Nut quartzite 3 Marjo Canyon diorite 2 Zabriskie quartzite member (of Pellisier granite x Wood Canyon formation) 2 Rainbow Flat group 2 Probably Lower Cambrian Raker Peak pyroxene andesites 1 Arrastre quartzite 1 Red Mountain pyroxene basalts * Precambrian and Lower Paleosoic(?) San Antonio Canyon group 2 Panamint metamorphic complex1 Saroc Ridge group 2 Precambrian Stoddard Canyon quartz mon- Beck Spring dolomite 2 zonite 2 Berdoo granite 3 fSuisun marble 3 Chubbuck marble member (of Table Mountain andesite l Essex series) 2 Tehachapi marble 1 Chuckwalla complex 2 Temecula Canyon granite J Crystal Spring formation 2 Twin Lakes andesites x Deep Spring formation l Weitchpec schists x Essex series 2 West Prospect basalt l Fenner granite gneiss 2 West Ridge group 3 Gold Park gabbro-diorite 2 Willow Lake basalts l Halloran complex 3 Colorado Hinkley Valley complex 2 Cenozoic (probably Quaternary) Hodge complex 3 Brush Hollow limestone 2 Johannesburg gneiss 1 Quaternary Kilbeck granite gneiss 2 Grayback wash l Kingston Peak formation 2 Recent Needles complex 2 Piney Creek alluvium 2 Orocopia schist 2 Pleistocene Pahrump series 2 Florida gravel 1 Palms granite 2 Oxford gravel l Pinto gneiss 2 Pleistocene (pre-Wisconsin) Rand schist x Cerro till 1 Reed dolomite l Durango till 1 Roberts formation x Wyman formation 1 Porphyry Peaks conglomerate 2 Precambrian(f) Tertiary Baldwin gneiss 2 Baker Lake porphyry 2 Box Springs complex 3 dacite l Echo granite 1 Basin rhyolite 2 50483& £ 452 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Colorado Continued Colorado Continued Tertiary Continued Pliocene(?) Basin Ridge group 2 Bay field gravel 1 Bassick agglomerate 1 Bridgetimber gravel l Black Hill rhyolite 1 Hinsdale formation 1 Bonanza latite 1 1 Brewer Creek latite l Nussbaum formation 1 Buffalo Peaks andesite 1 Pliocene, upper, or Pleistocene, lower Calico Peak porphyry 1 x Chalmers quartz monzonite 2 Miocene or Pliocene Climax porphyry 2 Cimarron Creek latite 1 t Cripple Creek breccia 1 Difficulty Creek latite » Eagle Gulch latite * High Park lake beds 1 Empire Gulch rhyolite 1 Miocene Eshe porphyry 2 American Flat latite 1 Fairview diorite 1 Burns quartz latite or latite tuff 1 Golden member (of Arapahoe- Campbell Mountain rhyolite 1 formation) 2 Equity quartz latite l Grizzly Mountain rhyolite l Eureka rhyolite 1 formation Grizzly Peak rhyolite l fGap latite * Hayden Peak latite l Henson tuff l quartz monzonite 2 Huerto quartz latite (as ande­ Pleasant View member (of Arapa- site l) -) 2 Mammoth Mountain rhyolite 1 Porphyry Peak rhyolite l Nelson Mountain quartz latite * Porphyry Peaks rhyolite x Niagara Gulch latite 1 Pringle andesite 1 Outlet Tunnel quartz latite 1 Red Mountain rhyolite x t andesite x Squirrel Gulch latite 1 Phoenix Park quartz latite 1 Table Mountain formation 2 Picayune quartz latite (as vol­ Twin Lakes quartz monzonite canic group x) porphyry l Piedra rhyolite or group * Utica quartz monzonite porphyry 1 Rat Creek quartz latite 1 Tertiary, upper, or lower Pleisto­ Sheep Mountain quartz latite (as cene (?) andesite x) Little Union quartz latite 2 Silverton volcanic series 1 Tertiary, middle or upper fSummitville andesite x Alboroto rhyolite (as quartz rhyolite 1 latite !) Willow Creek rhyolite x Conejos formation (as andesite l) Windy Gulch rhyolite breccia 1 Creede formation l Miocene(?) Fisher quartz latite (as latite- Beidell latite-andesite i or quartz andesite l) latite volcanic series l 1 Treasure Mountain rhyolite (as Canyon Creek member (of San quartz latite x) Juan tuff) 1 Tertiary, lower (see also Upper fCropsy Peak type 1 (latite) Cretaceous or Tertiary, lower) Lake Fork quartz latite (as Eagle River porphyry 1 andesite x) Pando porphyry 2 Rawley andesite 1 Sacramento porphyry 1 San Juan tuff 1 or breccia Tertiary, lower, or Upper Creta­ Sneffels member (of San Juan ceous (?) tuff) i Elk Mountain porphyry 1 fSouth Mountain type l (latite) Evans Gulch porphyry 1 Tracy Creek quartz latite (as Gray porphyry group 1 andesite *) Iowa Gulch porphyry 2 Weller horizon or sandstone l Johnson Gulch porphyry 1 West Elk breccia 1 Lincoln porphyry 1 Miocene, upper or Pliocene White porphyry l Alnwick lake beds 1 Pliocene Miocene, upper and Pliocene conglomerate 2 fArkansas marls1 Wray channel beds (in Ash Miocene, upper Hollow formation) 3 Governor diorite 2 Stony Mountain diorite 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 453

United States Continued United States Continued Colorado Continued Colorado Continued Miocene, upper Continued Eocene, middle Continued Wagontongue formation 2 Douglas Creek member (of Green Miocene, middle, and Pliocene, lower River formation) 1 fPawnee Creek beds * Garden Gulch member (of Green Oligocene River formation) 1 Antero formation 1 Gunnison tillite (W. W. Atwood fCastle conglomerate l and W. R. Atwood, 1926, Jour. Chumway rhyolite 2 Geology, v. 34, no. 7, pt. 1, Guffey volcanics 2 p. 612-622) 2 Parachute Creek member (of Vista member (of White River ) 1 formation) 2 Eocene, lower and middle Oligocene (?) Huerfano formation 1 Blanco Basin formation 1 Eocene, lower Telluride conglomerate 1 or for­ Calumet granodiorite 2 mation Hiawatha member (of Wasatch Oligocene (?) or Miocene (?) formation) 1 Canby latite x Plateau Valley beds x Oligocene, upper, and Miocene, Paleocene and Eocene, lower lower DeBeque formation 2 fMartin Canyon beds x Paleocene Oligocene, upper Coalmont formation 1 Florissant lake beds 1 1 Oligocene, middle Ridgway till 1 fCedar Creek beds 1 fTiffany beds 1 Oligocene, lower Paleocene (?) to Oligocene(?) Balfour formation 2 Mount Aetna quartz monzonite Rock conglomerate 1 porphyry (as Etna quartz mon­ fHprsetail Creek beds x zonite porphyry l) Thirty-nine Mile volcanic series 2 Mount Pomeroy quartz mon­ Eocene or Oligocene zonite (as Pomeroy quartz Vallejo formation 2 monzonite x) Eocene and Oligocene Mount Princeton quartz mon­ fMonument Creek group x zonite r ; see also Princeton Post-Eocene, pre-Miocene quartz monzonite x Green Mountain conglomerate 2 Eocene Ohio Creek conglomerate 1 fBazoo porphhry x Brainerd quartz monzonite 1 Cretaceous andesite l Coloradan series x Chalk Mountain nevadite l Trinidad lignitic group l fCopper Mountain porphyry * Cretaceous (?) 1 Albion monzonite 2 fGold Hill porphyry l Greenwich shale x fGreen Mountain beds x Upper Cretaceous or Tertiary, lower fHuerfano series x Quail porphyry x McNulty Gulch rhyolite x Upper Cretaceous and Paleocene Modoc quartz monzonite 1 1 Montezuma quartz monzonite 1 l Mosquito porphyry l Denver formation 1 Mount Alto quartz monzonite 1 Middle Park formation 1 porphyry 1 Morley coal group x Rosita andesite 1 fRaton Hills group l fRuby formation l Raton Pass coal group x fSan Miguel conglomerate l Wooton coal group x fSilyerheels porphyry J Upper Cretaceous White Raven quartz monzonite 1 American Nettie quartzite l Eocene(?) Anchor Mine tongue (of Mancos fAnimas River beds x shale) x Silver Mountain monzonite por­ Apache sandstone l phyry x Apishapa shale 1 Eocene, middle Arapahoe formation 1 Anvil Points member (of Green Baldwin sandstone member (of River formation) 2 Mesaverde formation) 2 454 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Colorado Continued Colorado Continued Upper Cretaceous Continued Upper Cretaceous Continued Beecher Island shale member Richard sandstone member (of (of ) 1 Pierre shale) 1 Black Diamond coal group 1 Rockvale sandstone member (of Bowie shale member (of Me­ ) 1 sa verde formation) 2 Rocky Ridge sandstone member Cameo member (of Price River (of Pierre shale) 1 formation) 2 Rolling sandstone member (of Canyon City group x Mesaverde formation l or of 1 Mount Garfield formation) 1 Sopris coal group (in Vermejo fColorado series x formation) x Corcoran member (of Price Terry sandstone member (of River formation) 2 Pierre shale) 1 Cozzette member (of Price River Thatcher limestone member (of formation) 2 ) 2 Engle coal group (in Vermejo Timpas limestone l formation) l Tow Creek sandstone * member fFairfield coal group 1 (of lies formation) fGoff coal group (in Williams Trinidad sandstone 1 Fork formation) * Trout Creek sandstone or sand­ fGolden formation or group 1 stone member (of lies forma­ * tion) 1 Haybro formation 1 Twentymile coal group x Hayden Gulch sandstone mem­ Twentymile sandstone member ber (of Haybro formation) 1 (of ) x Holderness formation 1 Williams Fork formation x Hunter Canyon formation 1 fWillow Creek beds l Hygiene sandstone member (of Lower and Upper Cretaceous Pierre shale) 1 1, formation, or lies formation * shale Laramian series l Graneros shale 1 1 Lower Cretaceous Larimer sandstone member (of 2 Pierre shale) x Dry Creek Canyon member (of Lead King lime l Dakota sandstone) 2 Lewis shale l Glencairn shale member (of Lion Canyon coal group (in Purgatoire formation) 1 Williams Fork formation) * Eassler sandstone member (of fLion Canyon sandstone member South Platte formation) 2 (of Williams Fork formation) * Lytle sandstone member (of McDermott member (of Animas Purgatoire formation) 1 formation); (as formation x) Plainview sandstone member Mancos sandstone 1 (of South Platte formation) 2 1 ; where Mo wry Purgatoire formation 1 member is recognized Mancos South Platte formation 2 shale is Lower and Upper Van Bibber shale member (of Cretaceous South Platte formation) 2 Mancosian series 1 Jurassic 1 fGunnison formation l Mesaverde group or formation 1 Montezuma shales x Milliken sandstone member (of Ralston formation 2 Fox Hills sandstone) 1 Jurassic(?) Milner formation 1 Garo sandstone 2 Morapos sandstone member (of Upper Jurassic Mancos shale) l Bilk Creek sandstone member Mount Garfield formation 1 (of Wanakah formation) 2 Mount Harris formation 1 Black Girl limestone x Paonia shale member (of Me­ Bright Diamond limestone (in saverde formation) 1 ) l Patterson sand 1 (subsurface) Bright Diamond quartzite (in fPiedra formation x Morrison formation) x f Platte series 1 Doctor Bond sandstone x l Junction Creek sandstone 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 455

United States Continued United States Continued Colorado Continued Colorado Continued Upper Jurassic Continued Pennsylvanian and Permian fLa Plata sandstone 1 t Arkansas sandstone x fMcElmo formation 1 Glenwood tongue (of Weber Morrison formation l sandstone) 2 Morrisonian series 1 (as conglom­ limestone member erate or formation 1) (of Wanakah formation); (as Sangre de Cristo formation 1 beds in Morrison formation l) Pennsylvanian and Permian(f) Wanakah formation (as member Badito formation 1 of Morrison formation x) Jacque Mountain limestone mem­ Triassic ber (of ); fDoloresian series 1 (as member of Maroon forma­ Strain shale member (of Lykins tion 1) formation) 2 Minturn formation 2 Triassic(f) Rico formation x Chaquaqua member 1 (of Lykins White Quail limestone member formation) (of Minturn formation) 2 Gold Hill conglomerate l Pennsylvanian Red Canyon member 1 (of Lykins Battle Mountain formation 2 formation) Belden shale or formation 2 Elk Ridge limestone member (of Upper Triassic Minturn formation) 2 Dolores formation 1 1 Permian and Pennsylvanian(?) Garfield formation l Kangaroo formation 1 Glen Eyrie shale member (of Permian Fountain formation) l Bath sandstone sub-member (of Gothic formation 2 Pony Spring siltstone member l Hells Canyon formation 2 [of Maroon formation]) 3 Bergen shale member (of Lykins Hornsilver dolomite member (of formation) 2 Minturn formation) 3 Chubb siltstone member (of Ingleside formation 1 Maroon formation) x Kerber formation 1 Creston conglomerate phase 1 McCoy formation1 Cutler formation 1 Molas formation x Falcon limestone member (of Newett limestone member (of Lykins formation) 2 Weber? formation) 1 Glennon limestone member (of Paradox member (of Hermosa Lykins formation) 2 formation); (as formation x) Harriman shale member (of Pinkerton Trail limestone 2 Lykins formation) 2 Robinson limestone member (of Lyons sandstone 1 Minturn formation); (as mem­ Owl Canyon formation 2 ber of Maroon formation l) Pony Spring siltstone member (of Resolution dolomite member (of Maroon formation) 1 Minturn formation) 2 South Canyon Creek dolomite Swissvale gypsum member (of member (of Maroon forma­ Minturn formation) 2 tion) 2 Veta Pass limestone member 1 Permian(?) (of Lower Sangre de Cristo Rock Creek conglomerate mem­ conglomerate) ber (of Maroon formation) 2 Wearyman dolomite member (of State Bridge siltstone member (of Minturn formation) 2 Maroon formation) 2 f Weber grits x Permian(9) and Triassic(?) t Weber shales 1 Lykins formation l Whiskey Creek Pass limestone Middle Permian member (of Madera forma­ Schoolhouse sand 2 tion) 2 Carboniferous and Triassic(?) Youghall formation 2 Tarryall formation x Pennsylvanian (?) Carboniferous Coffman conglomerate member Rican series 1 (of Maroon formation) 1 Pennsylvanian, Permian, and Tri- Mississippian Beulah limestone 1 t Wyoming formation or group Hardscrabble limestone 2 456 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Colorado-^Continued Colorado Continued Mississippian Continued Precambrian Continued Williams Canyon limestone 1 Estes Park beds 2 Lower Mississippian Falcon granite gneiss 2 Gilman sandstone member (of granite group 1 Leadville dolomite) 2 Gunnison River series 1 Leadville limestone * or dolomite Hell Gate porphyry x fMillsap limestone 1 Holy Cross schist l Devonian or Mississippian(f) Idaho Springs formation 1 Flat-top limestone 1 Indian Creek granite 2 Upper Devonian Irving greenstone l f Cement shale l granite l Chaffee formation 1 Longs Peak-St. Vrain granite J Dyer dolomite member (of Mazatzal granite 2 Chaffee formation) 2 quartz monzonite * Elbert formation 1 Mount Morrison formation 2 fFairview shale 1 Mount Olympus granite 1 Ouray limestone 1 granite l Parting quartzite member (of group 1 Chaffee formation) * Overland Mountain granite J Ordovician granite x fTomichi limestone * Pikian series x fYule limestone x Powderhorn granite 1 Upper Ordovician Ralston formation l Fremont limestone 1 Raspberry Mountain granite l Priest Canyon member (of Fre­ River Portal mica schist l mont formation) 2 f granite x Middle Ordovician Salida schists x ' or quartzite Sangre de Cristo granite 1 Lower Ordovician Sawatch schist J Dead Horse conglomerate mem­ Silver Plume granite 1 ber (of Manitou formation) 2 Spring Creek granite 1 Manitou limestone,1 dolomite, or Summit type (of granite) l formation Swandyke hornblende gneiss l Tie Gulch dolomite member (of Tenmiie granite l Manitou formation) 2 Trimble granite l fUte Pass dolomite 1 Twilight granite J Cambrian to Upper Devonian fUinta sandstone or quartzite l fYulean series 1 Uncompahgre formation 1 Cambrian Vallecito conglomerate 1 Lodore formation or shale 1 Vernal Mesa granite 1 Upper Cambrian Westwater gneisses and schists ' Clinetop algal limestone member Whitehead granite 1 (of Dotsero formation) 2 Windy Point granite x Dotsero formation 2 Womack gneiss x Glenwood Canyon member (of Precambrian(?) Dotsero formation) 2 Bear Mountain granite 1 Ignacio quartzite 1 Central City granite 1 Peerless formation (as shale Evans granite 1 member of Sawatch quartzite x) Glendale granite l Sawatch quartzite l Santa Fe granite l fSawatchian series 1 Troutdale granite l Precambrian Probably Precambrian Big Thompson schist 1 Mount quartz mon­ Black Canyon schist 1 zonite 1 Boulder Creek granite (as granite gneiss x) Broncho Mountain granite x Bull-Domingo agglomerate J Clear Creek gneiss 1 volcanics 3 Coal Creek quartzite * Connecticut Cripple Creek granite 1 Pleistocene Curecanti granite x Berlin clay l Dubois greenstone 1 Clayton clay 1 Emmons Peak quartzite * Hartford clay l Bolus granite 1 Middletown clay l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 457

United States Continued United States Continued Connecticut Continued Connecticut Continued Pleistocene, upper Precambrian Continued New Haven clay 1 fMilford cblorite schist 1 Triassic Plainfield quartz schist J New Haven arkose 2 Precambrian(?) arkose 2 Barrack Mountain granite gneiss 1 Upper Triassic Danbury granodiorite gneiss 1 ( Connecticut shales,1 sandstone,1 t Greenwich formation l conglomerate and group 1 Hawleyville granite gneiss * Meriden ash bed l Sharon Mountain quartz diorite 1 South Britain conglomerate l Waramaug formation 2 Talcott diabase 1 t Wilton formation 1 Pre-Triassic Age(f) Orange phyllite l Lantern Hill quartz rock * Prospect porphyritic gneiss 1 Litchfield norite x Stony Creek granite gneiss 1 Delaware Paleozoic Pleistocene Hartland formation (as schist1) fDelaware River gravels and Mount Tom hornblende gneiss * clays x Nonewaug granite 2 District of Columbia Paleozoic(f) Pleistocene Haddam granite gneiss 1 Columbia group 1 Hebron gneiss 1 Middletown gneiss l Pliocene (?) Carboniferous or post-Carboniferous Good Hope formation 1 Canterbury granite gneiss 1 Tenley formation l Eastford granite gneiss l Lower and Upper Cretaceous Glastonbury granite gneiss l Potomac group 1 Lyme granite gneiss x Precambrian New London granite gneiss l Broad Branch series 1 Preston gabbro l t Piedmont crystalUnes, 1 gneiss, 1 Putnam gneiss 1 or granite * Scotland schist 1 Florida Sterling granite gneiss ' Becent(f) Willimantic gneiss 1 Van Valkenburg beds a Carboniferous Pleistocene and Recent Killingworth leucotonah'te 2 Lake Flirt marl 1 Pomfret phyllite x Pleistocene Woodstock quartz schist x Anastasia formation 1 Pennsylvanian (?) Coffee Mill Hammock marl ] Redstone granite 1 member (of Fort Thompson Pre-Pennsylvanian formation) Stonington gneiss 1 fEverglades limestone l Mississippian(?) or older Fort Thompson formation 1 Bolton schist l Key Largo limestone 1 Maromas granite gneiss 1 tKey West oolite x Ordovician Melbourne bone bed 1 facies (of fRiga schist l Pamlico sand) Waterbury gneiss 1 Miami oolite l Ordovician(?) fPalm Beach limestone l Bristol granite gneiss 1 Pliocene and Pleistocene Brookfield diorite 1 fLostmans River limestone 1 Collinsville granite gneiss l Pliocene fSalisbury schist 1 t Bristol formation * Upper Ordovician Caioosahatchee marl 1 or forma­ Thomaston granite (as granite tion gneiss x) fNashua marl l Cambrian and Ordovician Pliocene, middle f Canaan limestone and dolomite 1 Bone Valley gravel l or formation Precambrian Pliocene, lower Branford granite gneiss i Alachua formation 1 Dalton gneiss 1 Arcadia marl 1 East Haven granite 1 "Archer beds l Light House granite 1 ' De Soto beds l Mamacoke gneiss 1 Dunnellon formation l 458 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Florida Continued Florida Continued Pliocene, lower Continued Eocene, middle Continued fFloridian group or series * Tallahassee limestone 3 (subsur­ fPeace Creek beds x face) Miocene, upper Eocene, lower t Buckingham marl 2 Oldsmar limestone 2 (subsurface) t Jacksonville formation 1 Paleocene Tamiami formation 2 Cedar Keys limestone 2 (subsur­ Miocene, probably upper face) fEuchee phase 1 Upper Cretaceous Miocene, middle and upper Lawson limestone 2 (subsurface) t Alum Bluff series * Georgia fChoctawhatchee formation l Pleistocene Miocene, middle fOkefenokee formation 1 fAlaqua phase 1 Penholoway formation l Oak Grove sand 1 member (of fSatilla formation l River formation) Pliocene Permenters Farm beds 3 Charlton formation * Shoal River formation l Miocene, lower Whites Creek bed member (of fAltamaha formation or grit x Shoal River formation) 2 Griffin bed » Miocene, lower and middle Jacksonboro limestone x Alum Bluff group l t Marks Head marl l fApalachicola group * fParachucla marl or shale l Hawthorn formation 1 Wileys Landing bed 1 fTampa group x Miocene, lower Oligocene and Miocene fAspalaga clay or marl * fBainbridge residual beds 1 t Ballast Point silex bed J f Brier Creek marl x fChattahoochee formation * Oligocene, upper Chipola formation l Flint River formation 1 fOcheesee beds 1 Oligocene, middle t Flint River lower and upper St. Marks facies (of Tampa zones 1 fSopchoppy limestone 1 Eocene, upper Tampa limestone l fBainbridge marl * fTampa silex bed 1 Irvinton sand member (of Barn- fWakulla formation 1 well formation) 2 t Waldo formation l fKey Creek sand 1 White Beach sandrock * Sandersville limestone member Miocene, lower or later (of Barnwell formation) 2 t Manatee River marl 1 fShell Bluff marl (in Barnwell Oligocene, upper formation) x Suwannee limestone 1 Tivola tongue (of Ocala lime­ Oligocene, middle stone) 1 Marianna limestone l Twiggs clay member (of Barnwell Eocene, upper formation) x Bumpnose limestone member (of Eocene, middle Crystal River limestone) 2 McBean formation 1 Crystal River formation 2 Gadsden limestone 2 Upper Cretaceous Inglis member (of Moodys Atkinson formation 2 (subsurface) Branch formation) 2 Blufftown marl 1 fLevyville formation l Cusseta sand member (of Ripley Ocala limestone 1 formation) J or Cusseta sand f Peninsular limestone 1 Providence sand (as member of Williston member (of Moodys Ripley formation1) Branch formation) 2 fRenfroes marl x Eocene, middle or upper Paleozoic Gulf Hammock limestone 2 Palmetto type granite 2 Eocene, middle Paleozoic(?) Avon Park limestone 2 (subsurface Little River series 2 and surface) Permian(?) Lake City limestone 2 (subsurface) Stone Mountain granite 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 459

United States Continued United States Continued Georgia Continued Idaho Continued Carboniferous Pleistocene Continued fLookout Mountain sandstone 1 Burley lake beds l Mississippian Cedar Butte basalt 1 Lavender shale member (of Fort Emmett formation l Payne chert) 2 McKinney basalt 1 Lower and Middle Devonian Madson basalt 1 Armuchee chert 1 Malad basalt 1 Silurian Menan tuff 2 fRqckwood sandstone l Minidoka basalt l Ordovician or Silurian Sand Springs basalt 1 Taylors Ridge 1 (formation) Thousand Springs basalt l Middle Ordovician Wendeli Grade basalt 1 Deaton formation or series 1 Tertiary, upper, or Pleistocene Rockmart slate 1 Gentile Valley group 1 Cambrian (see also Precambrian Pliocene to Recent or Cambrian) Snake River basalt 1 Mineral Bluff formation 2 Pliocene fOostanaula shales or series 1 Edie School rhyolites 2 Salem Church granite * Idaho formation 1 Probably Cambrian Mink Creek conglomerate 2 High Tower granite x Pliocene(?) Upper Cambrian Boise sandstone x fFairmount slate l Cache Valley group * Middle and Upper Cambrian Donkey fanglomerate 2 Conasauga shale, limestone,1 Malade Valley group x formation, or group Marsh Creek group l Lower Cambrian Poison Creek formation l fCartersville formation x Pliocene, upper Pinelog conglomerate 1 Banbury volcanics 1 1 Hagerman lake beds 1 fRome sandstone 1 Pliocene, upper(f) Probably Lower Cambrian Raft lake beds l Cohutta conglomerate l Pliocene, middle (?) Precambrian or Cambrian Rockland Valley basalt 1 Canton schist x (?) Pliocene, lower Pine Mountain formation x Eagle Rock tuff \ Tallulah Falls quartzite 1 Massacre volcanics l Toccoa quartzite x Neely lake beds 1 Precambrian Miocene, Pliocene, and Pleistocene Acworth gneiss 1 JNampa beds x Amicalola gneiss 2 Miocene and Pliocene(f) Cohutta schist 2 Payette formation 1 Corbin granite 1 Miocene(?) Cunningham granite 2 Medicine Lodge beds 2 Dean formation 3 Miocene, upper, or Pliocene, lower Fort Mountain gneiss 2 Owyhee rhyolite * Hothouse formation 2 (?) Miocene, upper Hughes Gap formation 2 Pillar Falls mud flow 1 Manchester schist 2 Shoshone Falls andesite l Oglethorpe formation 2 Miocene, middle, or upper Snelson granite 2 Latour formation x Sparks schist 2 Oligocene(?) Woodland gneiss 2 Mount Bennett rhyolite 1 Precambrian(?) Probably Oligocene and Miocene Austell granite 2 Kamiah volcanics 1 Jeff Davis granite 2 Oligocene, upper, or Miocene, lower Lithonia granite-gneiss 2 Challis volcanics 1 Age(?) Germer tuffaceous member (of Panola granite 2 Challis volcanics) x Hawaii. See p. 618 Yankee Fork rhyolite member Idaho (of Challis volcanics) 1 Pleistocene Cretaceous American Falls lake beds l Tygee sandstone 1 Bliss basalt l 460 GEOLOGIC NAMES OF NORTH AMEBICA United States Continued United States Continued Idaho Continued Idaho Continued Lower and Upper(f) Cretaceous Silurian Wayan formation l Trail Creek formation 1 Lower Cretaceous Ordovician Bechler conglomerate 1 or shale Phi Eappa formation 1 Draney limestone 1 Upper Ordovician Ephraim conglomerate * Fish Haven dolomite 1 Gannett group 1 Kinnikinic quartzite 1 Peterson limestone 1 Saturday Mountain formation ' Lower(?) Cretaceous Lower Ordovician Homer limestone member (of Ramshorn slate 1 Wayan formation) 1 Cambrian(?) Jurassic or Cretaceous Bannock volcanic formation 1 Boise granite 1 Bayhorse dolomite 1 Probably Jurassic or Cretaceous Garden Creek phyllite l Bayview granodiorhe 1 Upper Cambrian Granite Creek granodiorite 1 Ovid formation 2 Packsaddle Mountain granodio­ St. Charles limestone * rite i Worm Creek quartzite member Upper Jurassic (of St. Charles limestone) 1 Preuss sandstone 1 or redbeds Middle and Upper Cambrian Wolverine Canyon limestone Nounan limestone l member (of Preuss sandstone) 2 Middle Cambrian Triassic Bloomington formation 1 Lanes tongue (of Ankareh for­ Lakeview limestone 1 mation) 2 Langston limestone 1 Wood shale 1 tongue (of Ankareh Rennie shale 1 formation) Spence shale member (of Ute Triassic(?) limestone) l Higham grit 1 Middle^) Cambrian Upper Triassic Gold Creek quartzite 1 Deadman limestone 1 Lower Cambrian(l) Lucile series J Black Rock limestone l Stump sandstone 1 Precambrian Lower Triassic Blacktail formation 1 Fort Hall formation 1 Burke formation l Portneuf limestone 1 member (of Cataldo quartzite l Thaynes formation) fCoeur d'Alene series 1 Boss Fork limestone 1 fHarrison series l Timothy sandstone l or sand­ Hoodoo quartzite 1 stone member (of Thaynes Lemhi quartzite 2 formation) Orofino series x Permian and Upper Triassic Pocatello formation 2 Seven Devils volcanics l Prichard slate or formation 1 Permian Revett quartzite * 1 St. Regis formation x Rex chert member or tongue (of Striped Peak formation 1 Phosphoria formation) l Swauger quartzite 2 Permian(?) Wallace formation * Casto volcanics 1 Yellowjaeket formation ! Snake River series 1 Precambrian(l) Pre-Permian Albion Range group J Blacklead limestone 1 East Fork formation 1 Carboniferous Hyndman formation 1 Pittsburg formation 2 Age(l) Upper Carboniferous(?) Silver City granite 1 Sandpoint conglomerate 1 Illinois Pennsylvanian Pleistocene Wells formation 1 Cairo till l Wood River formation 1 Florence gravel 1 Mississippian and Devonian(?) Florencia formation l Milligan formation l Freeport gravel l Upper Devonian Joliet conglomerate l Grand View dolomite 1 Kankakee torrential deposits * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 461

United States Continued United States Continued Illinois Continued Illinois Continued Pleistocene Continued Pennsylvanian Continued Mahomet beds 1 Centralia limestone (in McLeans­ Peru beds 1 boro formation) * fPrairie formation 1 Claypool sand l (subsurface) Seignelay till 1 Cohn cyclothem a Silveria formation 1 Collinsville limestone 1 Tazewell loess x Copperas Creek shale and sand­ Pleistocene (Wisconsin) stone (in McLeansboro forma­ Deer Plain formation 8 tion) 1 Farmdale loess 2 Covel conglomerate (in Sum- Kickapoo beds x mum cyclothem) 2 Peorian loess 1 Craborchard cyclothem (includ­ Rockdale drift 2 ing Craborchard limestone) 2 Pleistocene (pre-Wisconsiri) Crows Mill limestone (in Mc­ Pecatonica till ! Leansboro formation) 1 Pleistocene (Sangamonl and Illinoi- Cuba sandstone (in Carbondale an) formation) 1 Brussels formation 8 Cutler limestone member (of Mc­ Pleistocene (Illinoian) Leansboro formation) l Illinoian drift l Dayis formation or cyclothem Lemont drift 8 (including Davis sandstone) 8 Pleistocene (Nebraskari) Delong cyclical formation 1 Sankoty sand 8 Delwood formation or cyclothem Pennsylvanian (including Delwood. sand­ Abingdon cyclothem 2 stone) 2 Absher limestone 2 Divide cyclothem 8 Ava shale (in Pottsville forma­ Drury shale and sandstone mem­ tion) 1 ber (of Pottsville formation) 1 Avon shale and limestone (in Dykstra sand 1 (subsurface) Pottsville formation) 1 Effingham terrane 1 Aylesworth limestone member Farmington shale (in McLeans­ (of Pottsville formation) 1 boro formation) 1 Babylon cyclical formation 1 Fairmount limestone (in Mc­ Bald Hill limestone (in Trade- Leansboro formation) 1 water formation) * Flannigan cyclothem 8 Bald Hill sandstone (in Trade- Flat Creek cyclothem 2 water formation) 1 Flat 1 (subsurface) Baldwinsville limestone (in Mc- Francis Creek shale and lime­ Leansboro formation) 1 stone (in Carbondale forma­ Bankston Fork limestone (in tion) 1 McLeansboro formation) 1 Galatia sandstone (in McLeans­ Bernadotte cyclical formation J boro formation) 1 Bernadotte sandstone (in Potts­ Galum limestone member (of Mc­ ville formation) 1 Leansboro formation) 1 Big Creek shale (in Carbondale Gila cyclothem (including Gila formation) 1 limestone) 2 Bogota cyclothem (including Gilchrist shale (in Pottsville for- Bogota limestone and shale) 2 nation) 1 Boskydell marine horizon (in Gimlet cyclical formation 1 Pottsville formation) 2 Gimlet limestone 1 Brereton cyclical formation 1 Golden Eagle limestone * Brereton limestone (in McLeans­ Goose Lake clay 2 boro formation) 1 Greenbush cyclical formation 1 Bridgeport sand 1 (subsurface) Greenup cyclothem (including Browning sandstone (in Carbon- Greenup limestone) 2 dale formation) 2 Hall cyclothem (including Hall Brushy Creek sandstone (in limestone) 2 McLeansboro formation) 1 Hanging Rock sandstone 1 Bunje cyclothem 8 Hanover limestone (in Carbon- Burroughs beds 2 dale formation) 8 Canton shale member (of Car­ Herrin limestone (in McLeans­ bondale formation) * boro formation) 1 Carlinville cyclical formation 1 Hicks cyclothem (including Hicks Carlinville sand 1 (subsurface) limestone) 8 462 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Illinois Continued Illinois Continued Pennsylvanian Continued Pennsylvanian Continued Ipava shale and sandstone (in Purington shale 1 ) 1 Quarry Creek limestone 1 Isabel sandstone 1 Reel limestone 2 Jamestown limestone member (of Ridgely sand 1 (subsurface) McLeansboro formation) 1 Robinson sands J (subsurface) Kickapoo sand 1 (subsurface) Rolls Ford shale member (of Mc­ fLa Salle formation 1 Leansboro formation) * Lawrenceville shale (in McLeans­ Ryans Ford limestone (in Mc­ boro formation) 2 Leansboro formation) J Lick Creek sandstone member (of St. David cyclical formation > Pottsville formation) 1 St. David shale and limestone (in Litchfield sand x (subsurface) Carbondale formation) 1 Little limestone (in Mc­ Scottville cyclothem (including Leansboro formation) 2 Scottville limestone) 2 Little Vermilion cyclothem (in­ Seahorne cyclical formation 1 cluding Little Vermilion lime­ Seahorne limestone 1 stone) 2 Sellers limestone (in Caseyville Little Wabash sandstone (in Mc­ formation) 2 Leansboro formation) 2 Seville cyclical formation 1 Liverpool cyclical formation 1 Seville limestone (in Pottsville Livingston limestone (in Mc­ formation) 1 Leansboro formation) 1 Shaw Point cyclothem 2 Lusk formation or cyclothem 2 Sheffield shale (in McLeansboro Macedonia formation or cyclo­ formation) 2 them 2 Shelby cyclothem 2 Macoupin cyclical formation ! Shoal Creek cyclical formation 1 Macoupin limestone (in Mc­ Shumway cyclothem (including Leansboro formation) 1 Shumway limestone) 2 Me Wain sandstone 2 Siggins sand 1 (subsurface) Makanda sandstone member (of Somerset member (of Pottsville Pottsville formation) * formation) 1 Marietta limestone and shale (in Sorento cyclothem 2 Carbondale formation) 1 Sparland cyclical formation 1 Marshall limestone (in McLeans­ Spoon River sandstone and shale boro formation) 1 (in Pottsville formation) 1 Martinsville limestone l Spring Valley limestone (in Mc­ Maxwell limestone (in McLeans­ Leansboro formation) 1 boro formation) 1 Summum cyclical formation : Millersville cyclothem (including Summum sandstone (in Carbon- Millersville limestone) 2 dale formation) 1 Murray Bluff sandstone (in Mac­ cyclothem 2 edonia formation) 2 Tresner limestone 2 Newton cyclothem (including Trivoli cyclical formation 1 Newton limestone) 2 Turner cyclothem (including Oak Grove member 1 (of Carbon- Turner limestone) 2 dale formation) Unionville sandstone x Omega limestone (in McLeans­ Utica clay 2 boro formation) 1 Waupecan sandstone 1 Palzo sandstone 2 Wjley cyclical formation 1 ParksrCreek limestone (in Potts­ Wilson sand ] (subsurface) ville formation) 1 Woodbury cyclothem (including Petro oil sand 1 (subsurface) Woodbury limestone) 2 Piasa limestone (in McLeans­ Upper Pennsylvanian boro formation) 2 Murphys Bluff sandstone 2 Pleasantview sandstone (in Car­ Middle and Upper Pennsylvanian bondale formation) 1 Carlinville limestone (as member Pokeberry limestone (in Mc­ of McLeansboro formation1) Leansboro formation) 2 La Salle limestone (as member of Pontiac limestone (in McLeans­ McLeansboro formation1) boro formation) 1 Lonsdale limestone (as member Creek cyclical formation 1 of McLeansboro formation1) Pounds formation, sandstone, or McLeansboro group (as forma­ cyclothem 2 tion1) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 463

United States Continued United States Continued Illinois Continued Illinois Continued Middle and Upper Pennsylvanian Upper Mississippian Continued Continued t Chester sandstone x New Haven limestone (as mem­ Chester series (as group1) ber of McLeansboro forma­ Clore limestone l tion1) Cypress sandstone 1 Rock Creek limestone (as mem­ Degonia sandstone 1 ber of McLeansboro forma­ Denny sand 1 (subsurface) tion1) Downeys Bluff member (of Shoal Creek limestone (as mem­ Renault formation) 2 ber of McLeansboro forma­ Elvira group 2 tion :) Fraileys shale 2 Middle Pennsylvanian l Carbondale group; formation 1 Haney limestone 2 in Kentucky Homberg group 2 Grindstaff sandstone; member Kinkaid limestone l (of 1 in Klein sand 1 (subsurface) Kentucky) Lindley sand 1 (subsurface) Stonefort limestone; member (of Lusk 1 [limestone] Tradewater formation : in Ken­ Menard limestone 1 tucky) New Design group 2 Vergennes sandstone (as member Okaw formation 1 of Carbondale formation1) Paint Creek formation 1 or shale Vermilionville sandstone (as Palestine sandstone 1 lentil in Carbondale forma­ Renault formation 1 tion1) Ridenhower shale 1 ppian (see also Devonian Rosiclare sandstone member (of and Mississippian) Ste. Genevieve limestone) 1 fBrewerville sandstone 1 St. Francisville sand 1 (subsurface) Chartresan series 1 Sparta sand 1 (subsurface) Elko gravel 1 Stein sand 1 (subsurface) Hartline chert 2 Tracey sand 1 (subsurface) Hoffner member (of Ste. Gene- Vienna limestone 1 vie ve limestone) 2 Waltersburg sandstone l Jonesboro limestone l Warsaw shale, limestone 1 or fKaskaskia limestone, formation, formation or group l Yankeetown chert : Kaskaskian series 1 Lower Mississippian McClosky sand 1 (subsurface) Darty limestone 2 McKerney limestone member (of ( Hamburg oolite 1 shale) 1 Kinderhook series (as group *) Marigold oolite 1 McCraney limestone 2 Martinsville sand : (subsurface) Oshawanan series 1 fPlum Creek beds 1 Devonian and Mississippian Rockwood sandstone : Carper sand 1 (subsurface) fRuma formation 1 Kaskaskia sequence 2 Shetlerville formation x Devonian Sonora sandstone 1 Backbone limestone l Spar Mountain sandstone (in Hoing sand 1 (subsurface) Fredonia member of Ste. Gene- Upper Devonian vieve formation) 2 Alto formation l Springville shale 1 Mountain Glen shale l Swan Creek sandstone 1 Middle Devonian Valmeyer series 1 Dutch Creek sandstone 1 Westfield lime : (subsurface) 1 Upper Mississippian or Pennsyl­ Lingle limestone 1 vanian Misenheimer shale l Bellair sands 1 (subsurface) Lower or Middle Devonian Buchanan sands : (subsurface) Clear Creek limestone l or chert Upper Mississippian Lower Devonian Allendale sand 1 (subsurface) Grassy Knob chert 1 Baldwin formation 2 Silurian Benoist sand 1 (subsurface) Athens marble 1 Bielh sand 1 (subsurface) Essex limestone x Carlyle sand 1 (subsurface) Winston dolomite : 464 GEOLOGIC NAMES OF NORTH AMERICA.

United States Continued United States Continued Illinois Continued Illinois Continued Middle Silurian Middle Ordovician Continued Bellwood dolomite 2 Fairplay member (of Dunleith Chicago formation 1 formation) 2 Coe group 2 Foreston member (of Grand Cordova dolomite 2 Detour formation) 2 Joliet limestone 1 Galena dolomite 1 Markgraf member (of Joliet t Galena series 1 formation) 2 Garnavillo member (of Gutten- Port Byron limestone 1 berg formation) 2 Rockdale dolomite 2 Glenhaven member (of Gutten- Romeo member (of Joliet for­ berg formation) 2 mation) 2 Grand Detour formation 2 Thorn group 2 Harmony Hill formation 2 Lower Silurian Hazel Green member (of Quim- Alexandrian series * bys Mill formation) 2 Channahon limestone 1 Hazelwood member (of Mifflin Gyrene member (of Edgewood formation) 2 limestone) x Hely member (of Grand Detour Kankakee limestone 1 formation) 2 Orchard Creek shale 1 Hennepin member (of Pecatonica Sexton Creek limestone * formation) 2 Upper Ordovician Kingdom formation 2 Aux Sable limestone * Loughridge formation 2 Cape limestone 2 Lowell Park member (of Platte- Divine limestone 1 ville limestone) 1 Du Page limestone 1 Medusa member (of Pecatonica Millsdale limestone 1 formation) 2 Rock Run limestone 1 Mortimer member (of Dunleith Thebes sandstone 1 formation) 2 Treat limestone l Nachusa formation 2 Wilmington limestone l New Glarus member (of Peca­ Middle Ordovician tonica formation) 2 Ancell group 2 Oglesby member (of Pecatonica Beechef member (of ) 2 formation) 2 Pecatonica dolomite member 1 Boarman member (of Mifflin (of Platteville formation) formation) 2 Rivoli member (of Dunleith for­ Brickeys member (of Mifflin mation) 2 formation) 2 St. James member (of Dunleith Briton member (of Mifflin for­ formation) 2 mation) 2 Sherwood member (of Dunleith Buckhorn member (of Dunleith formation) 2 formation) 2 Shullsburg member (of Quimbys Ghana member (of Pecatonica Mill formation) 2 formation) 2 Sinsinawa member (of Wise Lake Clement member (of Grand formation) 2 Detour formation) 2 Stillman member (of Grand De­ Dane member (of Pecatonica tour formation) 2 formation) 2 Strawbridge member (of Quim­ Daysville formation 2 bys Mill formation) 2 Dement member (of Grand Victory member (of Grand De­ Detour formation) 2 tour formation) 2 Dunleith formation 2 Walgreen member (of Grand Eagle Point member (of Dunleith Detour formation) 2 formation) 2 Wall member (of Dunleith for­ Eldena member (of Nachusa mation) 2 formation) 2 2 Elm member (of Nachusa for­ Wyota member (of Dunleith mation) 2 formation) 2 Establishment member (of Mif­ Lower Ordovician flin formation) 2 fCap au Gres sandstone * Everett member (of Nachusa Upper Cambrian formation) 2 Charter member (of Mt. Simon formation) 2 (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 465

United States Continued United States Continued Illinois Continued Indiana Continued Upper Cambrian Continued Pennsylvanian Continued Crane member (of Mt. Simon West Princeton sand l (subsur­ formation) 3 (subsurface) face) Gunn member (of Mt. Simon Upper Pennsylvanian formation) 2 (subsurface) Busseron sandstone member l Kenyon member (of Mt. Simon (of ) formation) 3 (subsurface) Dicksburg Hills sandstone 3 Lacey member (of Mt. Simon Dltney formation l formation) 2 (subsurface) Hayden Branch formation 2 Lovell member (of Mt. Simon Bridge formation 2 formation) 8 (subsurface) Inglefield sandstone l Mayfield member (of Mt. Simon Maria Creek limestone member formation) 2 (subsurface) (of Shelburn formation) 2 Indiana Merom sandstone l Pleistocene Rabens Branch bed (in Parker Hawpatch glacial gravel and formation) 2 sand x Shelburn formation 1 Indianan till l Staunton formation 1 Wabash beds 1 Vigo limestone member (of Shel­ Post- Carboniferous burn formation) 2 formation * West Franklin limestone * Pennsylvanian (see also Mississip- Middle Pennsylvanian pian or Pennsylvanian) Alum Cave l limestone member Arthur limestone (in Carbondale (of ) formation) 1 l Buffkin formation 1 Dugger formation 2 Cannelton sandstone : 2 Claypole Hills sandstone (in Petersburg formation 1 McLeansboro formation) 2 Universal limestone member (of Coxville sandstone 1 Dugger formation) 3 Double Horseshoe cyclothem 2 Lower Pennsylvanian Ferdinand limestone 2 (as sand­ fFort Knox sandstone 1 stone >) Friendsville formation l Mississippian or Pennsylvanian Fulda limestone 2 Davidson sands : (subsurface) Grandyiew limestone 2 Grayville formation l Bend limestone x Hanging Rock sandstone * t Bedford limestone l High Rock sandstone l Beech Creek limestone 1 Hindostan whetstone l Beech Creek shale x Holland limestone 2 Bristow shale and sandstone l fLady Washington sandstone l Brown oil sand 1 (subsurface) McClearys Bluff formation 1 Brownstown Hills sandstone McRoberts sand 1 (subsurface) member l (of Edwardsville f Martha Washington sandstone 1 formation) fMerom group 1 Bryantsville breccia (in Levias fMillersburg formation * member of Ste. Genevieve Mumford formation 8 limestone) 2 Mumford Hills sandstone (in Cataract Falls sandstone (in McLeansboro formation) 2 Ste. Genevieve formation) 2 New Harmony sandstone (in Cutright sandstone member 1 (of McLeansboro formation) 2 Edwardsville formation) Parker formation l Dry Creek sandstone member 1 Rockport sandstone * (of Edwardsville formation) St. Wendells limestone (in Mc­ Elwren sandstone l Leansboro formation) 2 Finley Knob shale member 1 St. Wendell sandstone 1 (of Carwood formation) Shelton Cliff sandstone 1 French Lick stone l Silverwood cyclothem (including Gennet Creek formation l Silverwood limestone) 2 Guthrie Creek member (of Har- fSomerville limestone 1 rodsburg limestone) l Velpen limestone 2 l l Huron group l t Wabash group * Jndiana oolitic limestone l 466 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Indiana Continued Indiana Continued Mississippian Continued Lower Mississippian Continued Indian Springs shale 1 Broomhill facies 1 (of New Prov­ Lampkins sandstone member 1 idence formation) (of Carwood formation) Carwood formation 1 Leesville limestone member (of Cisco Branch facies 1 (of Floyds Harrodsburg limestone) 1 Knob formation) Lost River chert l Delaneys Creek facies 1 (of Car- Mitchell limestone 1 wood formation) Mooretown sandstone 2 Dowell Hill facies l (of New Mount Ebel sandstone member 1 Providence formation) (of Edwardsville formation) Edwardsville formation 1 Mount Pleasant shales and sand­ Evans Landing facies 1 (of Car- stones 1 wood formation) Negli Creek limestone 1 Falling Run member (of Sander- Nixon sand * (subsurface) son formation) 2 Oakland City sand 1 (subsurface) Fleener facies 1 (of Carwood Orange-Martin limestone 1 formation) Paoli limestone 1 Floyds Knob formation 1 Petersburg sand > (subsurface) Fordyce Knob sandstone facies : Ramp Creek member (of Har­ (of Floyds Knob formation) rodsburg limestone) 1 Gent facies 1 (of Carwood forma­ tSt. Joseph formation l tion) Siberia limestone l Goss Mill limestone facies 1 (of Solsberry formation x Floyds Knob formation) Stevens Creek limestone 1 Henryville formation 2 Stobo limestone lens (in Borden Jacobs Chapel shale 2 group) l Kelly Hill facies 1 (of Carwood Weed Patch member l (of Ed­ formation) wardsville formation) Knob Creek facies 1 (of Carwood Wickliff sandstone 1 formation) fWilliamsport sandstone 1 Locust Point formation 1 Upper Mississippian Medora Knob facies 1 (of Ed­ Barker sand 1 (subsurface) wardsville formation) Brandy Run sandstone l Nelson Hill facies 1 (of Locust Colvin sand 1 (subsurface) Point formation) Cunningham sand 1 (subsurface) New Providence shale 1 Gibson sand 1 (subsurface) Riverside sandstone 1 Hightower sands * (subsurface) l Hoover gas sand * (subsurface) Rosewood shale 1 Hunt sand 1 (subsurface) Sanderson formation 2 Hyneman sand * (subsurface) Schooner Hill facies 1 (of Locust Kirkwood sand 1 (subsurface) Point formation) Loveless sand 1 (subsurface) Silver Hill facies 1 (of New Mount Olympus sand 1 (sub­ Providence formation) surface) Sparksville facies 1 (of Carwood Reelsville limestone 1 formation) 1 Spickert Knob facies 1 (of Locust Snyder sands 1 (subsurface) Point formation) fSpergen limestone 1 Springier Knob facies 1 (of Ed­ Tracy sand 1 (subsurface) wardsville formation) Vierling sand 1 (subsurface) Stewarts Landing facies 1 (of, West Baden (in Chester group) 1 Edwardsville formation) Willis sand 1 (subsurface) Underwood formation 2 Zimmerman sand 1 (subsurface) Devonian Lower Mississippian Little Rock Creek limestone 2 Aliens Creek fades 1 (of Ed­ Upper Devonian wardsville formation) Blackiston formation 2 Bearwallow facies 1 (of Edwards­ fDelphi black shale 1 ville formation) 1 Belmont facies 1 (of Locust Point Middle Devonian formation) Blocher formation 2 Bennettsville facies 1 (of Car- Deputy formation 2 wood formation) Geneva limestone 1 or dolomite Borden group { Jeffersonville limestone 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 467

United States Continued United States Continued Indiana Continued Iowa Continued Middle Devonian Continued Pleistocene Logansport limestone 2 Afton terrane 1 New Chapel chert bed (in Silver Albion gravel 1 Creek limestone) 1 Ashawa till 1 North Vernon limestone 1 Bla(ikhawkian 1 (till) Pendleton sandstone 1 Boyer till 1 Rocky Branch bone bed (in Dallas deposits 1 Jeffersonville limestone) 2 fEast lowan formation 1 Sellersburg limestone 1 Gregorian series 1 fShelby limestone 1 flowan loess 1 Silver Creek limestone member Loveland loess 1 (of Sellersburg limestone) 1 Mahaskan till 1 Speeds limestone member (of Moingona till 1 Sellersburg limestone) 2 Pleistocene (Wisconsin) Swanville formation 2 lowan drift 1 Silurian Pleistocene (pro-Wisconsin) Flat Rock stone 1 Wapellan series 1 Grandad limestone 1 Pleistocene (Kansari) fUtica limestone 1 Buchanan gravel 1 Upper Silurian Miocene (?) Kenneth limestone 1 Riverside sand * Kokomo limestone * Cretaceous or Tertiary Middle Silurian Rockville conglomerate 1 Hartsville limestone 1 Cretacmus Huntington dolomite l Ben ionian series 1 Laurel limestone 1 or dolomite1 ; Yanktonian series 2 limestone member (of Wayne Cretaccous(?) formation in Tennessee) Pine Creek conglomerate 1 Listen Creek formation 1 Upper Cretaceous or Miocene(f) Liston Creek limestone member Dodge gypsum 1 (of Liston Creek formation)1 Dodge shale 1 Mississinewa shale 1 Upper Cretaceous New Corydon limestone 1 Grill terrane 1 Noblesville dolomite 1 fDixon chalk or limestone 1 Osgood shale *; as formation 1 in Hawarden shale 1 Kentucky and Tennessee Nisbnabotna sandstone 1 Red Bridge limestone member (of Saxian series 1 Liston Creek formation) 1 Sergeant shale 1 ; 1 as clay member fWcodbury formation * (of Wayne formation in Ten­ Permian(f) nessee) Fort Dodge gypsum x Upper Ordovician Pennsylvanian Elkhorn formation 1 fAp panoose beds 1 Harmon formation 1 Elddra sandstone 1 Hitz limestone member (of Haynies limestone 1 Saluda limestone) 1 fMcnroe beds 1 Lake Huron shale 1 Munterville cyclothem (including Laughery formation 1 Munterville limestone) 2 1 ; limestone in Muscatine sandstone 2 Ohio » Plat be shale x fMadison beds 1 fRauoon River beds 1 t Madison water limestone l Red Rock channel sandstone 1 Marble Hill marble 1 Truro limestone x Richmond group 1 Pennsylvanian (Virgil) Saluda limestone 1 fBr£,ddyville limestone (in Shaw- Versailles bed (in Richmond nee formation) 1 group) 1 Bun oak shale 1 1 McKissick Grove shale 1 Middle Ordovician Stenaett limestone (in Shawnee Tippecanoe sequence 2 foj'mation) J Iowa Pennsylvanian (Missouri) Quaternary Char it on conglomerate member Dubuque terrane 1 (of. Pleasanton formation) 1

504835^59 5 468 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Iowa Continued Iowa Continued Pennsylvanian (Missouri) Con. Upper Devonian~Continued DeKalb limestone member (of Coralville limestone l ) 1 Floyd limestone l fEarlham limestone (in Kansas Hackberry shale 1 City formation) l Juniper Hill formation * Westerville limestone member (of Lime Creek shale l Kansas City formation) 1 Linwood member (of Cedar Val­ Winterset limestone member (of ley limestone) * Kansas City formation) 1 ; Littleton member (of Cedar limestone 1 in Kansas Valley limestone) l Pennsylvanian (Des Moines) Mason City limestone or dolo­ Coal City limestone 2 mite l Cooper Creek limestone 2 Nora limestone l Des Moines series (as group J) Owen substage or beds l Exline cyclothem (including Ex- Rockfordian series : line limestone) 2 fRockford shale l Rock Grove substage * Alden limestone 1 Sheffield formation 1 fAugusta limestone, group, or Shell Rock limestone 1 State Quarry limestone l fBelfast beds 1 Middle and Upper Devonian Bonaparte marble 1 fCedar limestone l Chapin beds 1 Davenport beds * Croton limestone (in St. Louis Middle Devonian limestone) 1 Cedar Rapids phase (of Otis Eagle City beds 1 limestone) 1 English River sandstone member Cedar Valley limestone * (of Hannibal shale) 1 Coggon limestone * 1 Fayette breccia x Humboldt oolite l Independence shale (as member Iowa marble x of Wapsipinicon limestone J) Iowa series 1 Kenwood beds l Iowa Falls dolomite 1 Lucas limestone 1 Keosauqua sandstone : Otis limestone 1 Le Grand beds 1 Rapid limestone J Maple Mill shale l Spring Grove member (of Wapsi­ fMarshalltown shale 1 pinicon limestone) 1 Mayne Creek formation l Vinton phase (of Otis limestone) 1 fMontrose chert 1 Wapsipinicon limestone 1 North Hill member 1 (of Hamp­ Westfield phase (of Otis lime­ ton formation) stone) * Pella beds 1 Middle(f) Devonian Prospect Hill sandstone member Montpelier sandstone l (of Hannibal shale) l Solon limestone l fSt. Louis marls 1 fSpringvale beds l Silurian Verdi beds (in St. Louis lime­ Hoing sandstone l (subsurface) stone) l Silurian(?) Wassonville limestone l Bertram dolomite l Lower Mississippian Upper Silurian Aplington formation 2 Goweran series 1 ' Middle Silurian Gilmore City limestone 1 Anamosa dolomite 1 l Colesburg dolomite 1 Devonian fDelaware limestone 1 Amana beds 2 Gower dolomite 1 Hutchinson limestone l Hartwick dolomite l Linnian series 2 Hopkinton dolomite 1 Raymond Quarry beds l Leclaire dolomite > Upper Devonian or Mississippian Sweetland Creek shale 1 Monticello dolomite l Upper Devonian fMount Vernon beds * Bloody Run zone 1 Sabula dolomite x Cedarian series 1 Waucoma limestone 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 469

United States Continued United States Continued Iowa Continued Kansas Continued Ordovician Pleistocene Continued fMaquoketa series * tEmma Creek formation 2 Murray Iron Works member (of Jones Ranch beds 2 Platteville formation) 2 (sub­ Kansan drift 1 surface) Kingsdown silt (as marl J) t Platteville stage * McPherson formation 1 Upper Ordovician Meade formation (as gravel J) Brainard member (of the Ma- Missler member (of Baliard for­ quoketa shale) (as shale J) mation) ; (as member of Meade Clermont shale 1 formation 2) Colmar shales 1 Odee formation 2 fElgin limestone 1 Pearlette ash l member (of Sappa l formation) Maquoketa shale 1 Peoria silt member (of Sanborn Maquoketan series 1 formation) 2 Volga shales 1 fSalt Creek gravel beds 1 Middle or Upper Ordovician Stump Arroyo member (of Dubuque shaley member (of Crooked Creek formation) 2 Galena dolomite); (as forma­ Vanhem formation 2 tion ») Tertiary Middle Ordovician Abilene conglomerate 1 1 or formation Pliocene (see also Miocene, Pliocene Glenwood shale member (of and Pleistocene; and Miocene or Platteville formation) 1 ; shale Pliocene) or formation in Michigan Calvert ash bed (in Ash Hollow Guttenberg limestone member 1 member of ) 2 (of Decorah formation) Dellvale ash bed (in Ash Hollow Ion dolomite member l (of De­ member of Ogallala formation) 2 corah formation) Fort Wallace ash bed (in Ash fJulian limestone 1 Hollow member of Ogallala t Julian series 1 formation) 2 McGregor limestone member( of Rawlins ash bed (in Ash Hollow Platteville formation) 1 member of Ogallala formation) 2 Spechts Ferry shale member 1 Reager ash bed (in Ash Hollow (of Decorah formation) member of Ogallala formation) 2 Lower Ordovician Reamsville ash bed (in Ash Hol­ 1 low member of Ogallala for­ Winneshiek limestone * mation) 2 Cambrian XI member (of Rexroad forma­ Hanoverian series l tion) 2 Upper Cambrian Pliocene, upper Albin shale 1 Rexroad formation 2 Allamakee dolomite 1 Pliocene, middle Hull porphyry 1 Delmore formation 2 Waukon sandstone 1 Pliocene, lower Precambrian Edson beds (in Ogallala forma­ Ragg quartzite 2 tion) 1 Siouan series 1 Rhinoceros Hill beds (in Ogallala Split-Rock slate l formation) l Precambrian(?) Miocene, Pliocene, and Pleistocene Tipton sandstone 1 t Plains marl 1 Kansas Miocene or Pliocene Quaternary Woodhouse clay (in Ogallala for­ Gerlane formation 1 mation) 1 Pleistocene and Recent Cretaceous Sanborn group (as formation *) Brookville terrane 1 Pleistocene Buckskinian series 2 Atchison formation 1 Cawker terrane 1 Baliard formation (C. W. Hib- Gove chalk 2 bard, 1958, Am. Jour. Sci., v. t Medicine beds ' 256, no. 1, p. 55, 56) Pete terrane 1 Belleville formation 1 Rawlinsian series 2 Chase Channel formation 2 Terra Cotta clay member (of Crooked Creek formation 2 ) * 470 GEOLOGIC NAMES OF NORTH AMERICA.

United States Continued United States Continued Kansas Continued Kansas Continued Cretaceous Continued Lower Cretaceous Wallace shale 2 fBelvidere shale 1 Wiskanian series 2 Black Hill shale 1 Cretaceous (?) Blue shale 1 Champion shell bed (in Kiowa Hills Pond peridotite 2 shale) 1 Upper Cretaceous Cheyenne sandstone l ; member fArickaree shale 1 (of Purgatoire formation in shale member (of Oklahoma) Carlile shale *) fCorral sandstone (in Cheyenne Bridge Creek limestone member sandstone) 1 (of Greenhorn limestone) 1 fElk Creek beds (in Cheyenne Cockrum sandstone 2 sandstone) l Codell sandstone member (of Fullington shale 1 Carlile shale) l ; member (of fGreenleaf sandstone * in NE Colorado) bed ' fDowns limestone (in Greenhorn Kiowa shale 1 limestone) * fKirby clay 1 Ellsworth formation 2 fLanphier beds (in Cheyenne Fairport chalky shale member (of sandstone) 1 Carlile shale) 1 Marquette member 1 (of Belvi- fFence-post limestone 1 dere formation) JFort Hays division or group 1 Mentor formation 1 Natural Corral member 1 (of Fort Hays limestone member (of Belvidere formation) ) 1 fSpring Creek clays * fGraham jasper (in Niobrara fStokes sandstone (in Cheyenne formation) 1 sandstone) 1 Hartland shale member (of t Walker beds 1 Greenhorn limestone) 1 Windom member 1 (of Belvidere Janssen clay member (of Dakota formation) formation) 2 Permian Jetmore chalky member (of Admire group (as shale *) Greenhorn limestone) 1 Afton limestone member (of Lake Creek shale member (of ) 2 Pierre shale) 1 fAlma limestone 1 Lincoln limestone member (of Americus limestone member (of Greenhorn limestone) 1 Foraker limestone) 1 fLisbon shale * Annelly gypsum member (of Wellington formation) 2 Norton zone (in Niobrara forma­ Bader limestone (as formation l) tion) i Beattie limestone (as formation >) fOsborne limestone l Big Basin sandstone ! Pfeifer shale member (of Green­ Big Blue group or series 1 horn limestone) 1 Bigelow formation 1 fReeder sandstone l Blue Rapids shale 1 Rocktown channel sandstone Blue Springs shale 1 member (of member (of Dakota sand­ Matfield shale) stone) 1 Bruno limestone 1 fRussell formation l Buckeye shale 1 Salt Grass shale member (of Carlton limestone 1 Pierre shale) 1 Cave Creek formation 1 Sharon Springs member (of Cedar Hills anhydrite l Pierre shale) 1 Cedar Hills sandstone 1 fCedar Point shales and shaly or marl mem­ limestones 1 ber (of Niobrara formation) 1 Chase group * Solomon formation 2 Chicago Mound formation 2 fTrego zone (in Niobrara forma­ Chikaskia member (of Harper tion) i sandstone) 2 fVictoria formation, clays, or Chishohn Creek shale member shale 1 (of Wellington formation) 2 Weskan shale member (of Pierre Cimarron group l shale) 1 fCottonwood formation x INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 471

United States Continued United States Continued Kansas Continued Kansas Continued Permian Continued Permian Continued Cottonwood limestone l member Janesville shale (R. C. Moore (of Beattie limestone); lime­ and M. R. Mudge, 1956, Am. stone in Oklahoma Assoc. Petroleum Geologists t Cotton wood shales 1 Bull., v. 40, no. 9, p. 2273) Council Grove group 1 Jenkins clay 1 Cresswell limestone l member Kiger division l (of Winfield limestone) Kingman sandstone member (of Crisfield member (of Salt Plain Harper sandstone) 2 formation) 2 Legion shale member l (of fCrusher Hill alternating shales Grenola limestone) and limestone 1 fLuta limestone l Day Creek dolomite1 : member {Manhattan beds * (of Cloud Chief formation in {Manhattan limestone * Oklahoma) concretionary lime­ stone l Dog Creek shale 1 Marion flint 1 Donegal limestone * t Marion formation 1 Doyle shale l Matfield shale l Easly Creek shale l Medicine Lodge gypsum l mem­ fElmdale shale * or formation * ber (of ) Elmo limestone member * (of limestone member (of Wellington shale) Wellington formation) 2 t shale l Morrill limestone 1 member (of Eskridge shale l Beattie limestone) fFlint Hills division J fNeosho shale member (of Gar­ Fiorena shale member (of Beat- rison shale) 1 tie limestone); (as member of Nescatunga gypsum member (of Garrison shale J) Blaine formation)2 t Florence limestone 1 Neva limestone l member (of Florence limestone member (of Grenola limestone) Barneston limestone); (as Newbern shale * Florence flint *) Ninnescah shale 2 Flower-pot shale * Nippewalla group 2 Fort Riley limestone l member Nolans limestone l (of Barneston limestone) Ogden flint l Funston limestone 1 Oketo shale l member (of Gage shale 1 member (of Doyle Barneston limestone) shale) Onaga shale (as limestone x) t Garrison shale l fPearl shale * Geuda salt measures 1 Prairie Creek limestone lentil Geuda Springs shale member (of (in Geuda Springs shale mem­ Wellington formation) 2 ber of Wellington formation) 2 Grant shale 1 member (of Win- fRed Bluff sandstone * field limestone) Runnymede sandstone member Greeley gypsum l (of Ninnescah formation) 2 Grenola limestone (as forma­ Sabetha limestone l tion i) Sallyards limestone member l Hackberry shale * (of Grenola limestone) Harper sandstone l Salt Fork division l Havensville shale member (of Salt Plain shale l Wreford limestone) 1 Sanatorium limestone lentil (in Herington limestone l member Geuda Springs shale member (of Nolans limestone); lime­ of Wellington formation) 2 stone in Oklahoma Highland shale member (of Well­ Schroyer limestone 1 member ington formation) 2 (of Wreford limestone) Hollenberg limestone * Shimer gypsum member (of Hooser shale * member (of Bader Blaine formation) 1 limestone) Slate Creek limestone member Hope gypsum * (of Wellington formation) 2 Hutchinson salt member (of Solomon gypsum * Wellington formation); (as Stearns shale l Hutchison salt bed J) Stone Corral l dolomite 472 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Kansas-j-Continued Kansas Continued Permian Continued Pennsylvanian Continued Stovall limestone 1 member (of Humphrey Creek shale * Winfield limestone) flndependence limestone 1 Strickler limestone 1 Institute limestone * fStrong flint 1 flola shale J fStrong City beds 1 Kickapoo limestone l Sumner group 1 fLaneville shale 1 fSun City marble 1 La Cygne shale member 1 (of {Thrall limestone member (of Marmaton formation) Foraker limestone) 1 fLecompton shale x Threemile limestone 1 member Le Roy shale x (of Wreford limestone) Linwood shale 1 Towanda limestone member (of Linwood shales 8 Doyle shale) ' fMarais des Cygnes coal series 1 Towle shale * member (of Onaga fMarais des Cygnes shales 1 shale) Mission Creek shale (in Deer Udall limestone lentil (in Geuda Creek limestone) l Springs shale member of Well­ t Mound Valley limestone 1 ington formation) 8 f Mound Valley shale J Wellington formation l Naish limestone 1 t Wellington marble l Neodesha sandstone x West Point shale (in Admire Neosho limestone 1 shale) l Olpe shale l Winfield limestone 1 Oswald lime l (subsurface) Wreford limestone 1 fOswego limestone l Pennsylvanian Ottawa limestone 1 fAllen limestone member l fPainterhood limestone 1 Altoona limestone 1 fParsons formation 1 fAmericus beds 1 fPawnee limestone series 1 {Barclay limestone J Peacock sand l (subsurface) formation 1 or group * fPiqua limestone member 1 Boyer sand 1 (subsurface) fPottawatomie formation 1 Burlingame shale 1 fPottawatomie series 1 Burlington limestone l Rainbow Bend sand J (subsur­ 1 Buxton formation 1 face) Calhoun limestone 1 Redd sand l (subsurface) Caneyville shale l fCarlyle limestone J Reserve shale member 1 (of Falls Cave Springs sandstone 1 City formation) fChautauqua sandstone 1 Robinett flags l fCoffeyyille limestone 1 Rossville shales and sandstones * Columbia Ford limestone 1 Schubert Creek limestone 1 Concrete shale * fShawnee sandstone * Dashner limestone 1 Shunganunga shale J Dodge limestone J (subsurface) Sni Mills limestone l limestone 1 Sooy conglomerate J (subsurface) fDunlap limestone 1 fSpring Rock limestone x fEarlton limestone l Stalnaker sand 1 (subsurface) Einstine sandstone 1 fStanton limestone series 1 Elk Falls limestone J Stokes sand 1 (subsurface) Elm Branch shale l fStrawn limestone l fEmporia blue limestone 1 Tennison Creek shale 1 fEmporia reservoir shales 1 Uniontown limestone * fErie limestone 1 f Walnut shale 1 Eudora limestone 1 fWaverly flags 1 fEureka beds l fWilson formation l {Eureka limestone 1 Wolf River limestone 1 Fall River sandstone 1 Wyandotte group 1 Frenck shale * fWyckoff limestone l fGarnett limestone * Upper Pennsylvanian Gorham sand 1 (subsurface) Kawvian series 2 Hancock sand l (subsurface) Pennsylvanian (Virgil) Humboldt limestone 1 Aarde shale l member (of How­ Humphrey shale 1 ard limestone) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 473

United States Continued United States Continued Kansas Continued Kansas Continued Pennsylvanian (Virgil) Continued Pennsylvanian (Virgil) Con. Auburn shale l Jonesburg sandstone member Bachelor Creek limestone l mem­ (of Lawrence shale; of Vamoosa ber (of Howard limestone) formation in Oklahoma); (as Bern limestone (R. C. Moore and member of Nelagoney forma­ M. R. Mudge, 1956, Am. tion ») Assoc. Petroleum Geologist, v. Kanwaka shale 1 ; fmember (of 40, no. 9, p. 2276-2277. Shawnee formation) 1 Big Springs limestone (in Le- Hereford limestone tmember (of compton limestone) 1 Oread limestone) 1 Burlingame limestone member Lawrence shale *; member (of (of Bern limestone); (as mem­ Douglas formation) 1 ber of Wabaunsee formation1) Leavenworth limestone member Calhoun shale (as member of (of Oread limestone)1 Shawnee formation J) Lecompton limestone J ; tmem­ Caneyville limestone 1 ber (of Shawnee formation) 1 Cedarvale shale member (of Maple Hill limestone 1 member Scranton shale) 1 (of Zeandale limestone) Clay Creek limestone (in Kan- Oread limestone 1 ; limestone waka shale) 1 member (of Vamoosa forma­ Coal Creek limestone member tion in Oklahoma) (of Topeka limestone) 1 tOsage limestone (in Shawnee Deer Creek limestone (as mem­ formation) 1 ber of Shawnee formation *) tOsage City limestone 1 fOsage City shale (in Shawnee Doniphan shale (in Lecompton formation) 1 limestone) 1 Oskaloosa shale (in Deer Creek Douglas group 1 limestone) 1 Dover limestone 1 member (of Ozawkie limestone (in Deer Creek Stotler limestone) limestone) 1 Dry shale 1 member (of Stotler Reading limestone 1 member (of limestone) Emporia limestone) Du Bois limestone member (of Bobbins shale member l (of Topeka limestone) 1 Stranger formation) Elgin sandstone; 1 member (of Root shale (R. C. Moore and M. Vamoosa formation in Okla­ R. Mudge, 1956, Am. Assoc. homa) Petroleum Geologist, v. 40, Elmont limestone l member (of no. 9, p. 2274 (fig. 1), 2275) Emporia limestone) Sac-Fox subgroup l Emporia limestone l Scranton shale 1 ; tmember (of French Creek shale J member (of Shawnee formation) 1 Root shale) Severy shale *; tmemker (of Friedrich shale l member (of Shawnee formation)1 Root shale) Shawnee group 1 ; tformation in Grandhaven limestone l member Missouri and Iowa 1 (of Stotler limestone) Silver Lake shale member (of Happy Hollow limestone member Scranton shale) 1 (of Scranton shale) 1 Soldier Creek shale 1 member fHartford limestone (in Shawnee (of Bern limestone) formation) 1 Spring Branch limestone (in Harveyville shale 1 Lecompton limestone) 1 Haskell limestone 1 member (of Stormont limestone member (of Stranger formation) Pierson Point shale) 2 Howard limestone l ; tmember Stranger formation 1 (of Shawnee formation) 1 Stull shale (in Kanwaka shale) 1 Iowa Point shale (in Calhoun Tarkio limestone member (of shale) 1 Zeandale limestone); (as mem­ Ireland sandstone 1 member (of ber of Wabaunsee formation1) Lawrence shale) Tecumseh shale l or formation; Jackson Park shale member (of tmember (of Shawnee forma­ Kanwaka shale) 1 tion)1 Jim Creek limestone 1 member Topeka limestone J ; tmember (of (of Root shale) Shawnee formation) 1 474 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Kansas Continued Kansas Continued Pennsylvanian (Virgil) Con. Pennsylvanian (Missouri) Con. Tonganoxie sandstone l member lola limestone1 ; limestone mem­ (of Stranger formation) ber (of Kansas City formation Toronto limestone 1 member (of in Missouri) * Oread limestone) Island Creek shale l Utopia limestone 1 member (of Ladore shale1 ; shale member (of Howard limestone) Kansas City formation in Vinland shale 1 member (of Missouri) * Stranger formation) Lane shale1 ; shale member (of Virgil series 1 Lansing formation in Mis­ Wabaunsee group (as forma­ souri) 1 tion i) Lansing group1 ; formation in Wakarusa limestone l member Missouri l (of Bern limestone) Linn subgroup 8 Wamego shale member (of Zean- Little Kaw limestone member 1 dale formation); (as shale 2) (of Stanton limestone) Westphalia limestone 1 member Merriam limestone * (of Stranger formation) Middle Creek limestone l White Cloud shale 1 member (of Mound City shale 1 Scranton shale) Muncie Creek shale * Willard shale 1 Noxie sandstone lentil or member Winzeler shale * member (of (of Chanute formation) 2 Howard limestone) Olathe limestone member 1 (of Zeandale formation (R. C. Moore Stanton limestone) and M. R. Mudge, 1956, Paoli limestone 1 Am Assoc. Petroleum Geolo­ Pedee group 1 gists Bull, v. 40, no. 9, p. 2276) Pleasanton formation l Pennsylvanian (Missouri) Quindaro shale l Argentine limestone l Block limestone 1 Quivira shale (in Kansas City Bonner Springs shale l formation) 1 Bronson formation J or group 1 Spring Hill limestone 1 Canville limestone l Stanton limestone1 ; limestone Captain Creek limestone member member (of Lansing formation (of Stanton limestone) 1 in Missouri) 1 Chanute shale 1 ; shale member Stark shale l (of Kansas City formation in fThayer shale (in Kansas City Missouri) 1 formation) l Cherryvale shale 1 ; shale mem­ Vilas shale1 ; shale member (of ber (of Kansas City formation Lansing formation in Mis­ in Missouri) 1 souri) 1 Coffeyville formation 1 Victory Junction shale member l Corbin City limestone 1 (of Stanton limestone) Cottage Grove sandstone * Wea shale 1 Critzer limestone 1 Wyandotte limestone l t Dennis limestone l Zarah subgroup * Dodds Creek sandstone ! Middle Pennsylvanian Drum limestone 1 ; limestone Blankenship sand 1 (subsurface) member (of Kansas City for­ Cattleman sand 1 (subsurface) mation in Missouri) 1 Chetopa shales 1 fDudley shale * or shale member Colony sand * (subsurface) (of Pleasanton formation) l Fox Bush sand J (subsurface) Eudora shale 1 member (of Stan­ Sallyards sand * (subsurface) ton limestone) Welch chert 1 (subsurface) Fontana shale 1 Pennsylvanian (Des Moines) Frisbie limestone J Altamont limestone1 ; limestone Galesburg shale l member (of Oologah limestone Hepler sandstone formation 8 in Oklahoma) Hertha limestone 1 ; limestone Anna cyclothem (including Anna member (of Kansas City for­ shale) 2 mation in Missouri) l Bandera shale1 ; member (of Hickory Creek shale 1 Oologah limestone in Okla­ Hushpuckney shale 1 homa) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 475

United States Continued United States Continued Kansas Continued Kansas Continued Pennsylvanian (Des Moines) Con. Lower Mississippian Continued Bandera Quarry sandstone mem- Short Creek oolite member (of bera (of Bandera shale) 2 Boone limestone) 1 or (of Keo- Breezy Hill limestone member kuk limestone) (of Cherokee shale) of Senora Skelton shale J (subsurface) formation in Oklahoma) 2 Watchorn formation 2 (subsur­ Cherokee shale 1 face) Coal vale cyclothem or formation 2 Devonian or Silurian(f) f Columbus sandstone (in Chero­ Younkin formation * (subsurface) kee shale) * Middle Devonian Croweburg cyclothem or forma­ Ediger limestone 1 (subsurface) tion 2 Silurian Englevale channel sandstone 1 Hollow dolomite * (subsurface) Fleming cyclothem or formation 8 Ordovician fFort Scott coal series 1 Smock sand 1 (subsurface) Fort Scott limestone1 ; fh'mestone Sluss sand l (subsurface) member (of Henrietta forma­ Stapleton zone * (subsurface) tion)! Urschel lime J (subsurface) fFort Scott marble series (in Ordovician(f) Cherokee shale) 1 Engle shale 1 (subsurface) Idenbro cyclothem (including Kentucky Idenbro limestone) 2 Pleistocene Knifeton cyclothem or forma­ Fulton loam l tion 2 Graves Creek formation 1 Laberdie cyclothem (including Hickman group 1 Laberdie limestone) 2 Paducah formation l Labette shale;1 fshale member Tennessee River gravels * (of Henrietta formation) 1 Union formation * Lake Neosho shale member (of Tertiary or older Altamont limestone) 2 Tip Top sand l Little Osage shale member (of Pliocene or Pleistocene Fort Scott limestone) 2 Irvine formation l Marmaton group1 ; tMarmaton Penns ylvanian formation 1 Aberdeen sandstone (in Potts- Memorial shale l ville formation) 1 Mineral cyclothem or formation 2 Baker sand [ (subsurface) Mine Creek cyclothem (including Battery Rock cyclothem (in­ Mine Creek shale) 2 cluding Battery Rock sand­ Mulky cyclothem or formation 2 stone or conglomerate) 8 Neutral cyclothem or formation 2 Beattyville shale 1 Norfleet cyclothem (including fBeaver sandstone l Norfleet limestone) 2 Bee Spring sandstone * Pawnee limestone1 ; member (of Bee Tree shale 2 Oologah limestone in Okla­ Bald Hill shale (in Henshaw homa) formation) 1 Perry Farm cyclothem (including Carthage limestone (in McLeans- Perry Farm shale) 2 boro formation) 1 Pilot cyclothem or formation 2 Corbin conglomerate lentil * (in Riverton cyclothem or formation 2 Lee formation) Rowe formation or coal cycle 2 fCurlew sandstone (in Trade- Scammon cyclothem or forma­ water formation) 1 tion 8 Deanefield shale (in Pottsville Stice cyclothem 2 formation) 1 Walter Johnson sandstone mem­ DeKoven formation 1 ber (of Nowata shale)2 Dingus limestone (in Pottsville Weir cyclothem or formation 2 formation) 1 Pennsylvanian (Morrow) fDixon formation * Kearney formation 2 (subsurface) fDixon sandstone (in Henshaw Mississippian (f) formation) 1 Stanhope sand x (subsurface) Dwale shale * Lower Mississippian Elkins Fork shale 1 t Cherokee limestone 1 Epperson sand 1 (subsurface) Cowley formation 2 (subsurface) Finnie sandstone (in Tradewater formation) 1 476 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Kentucky Continued Kentucky Continued Pennsylvanian Continued Middle Pennsylvanian Continued Finnie Bluff sandstone 1 sandstone member Flat Lick sandstone 1 (of Mingo formation) 1 Flat Top Mountain sandstone 1 Hance formation l Flint Ridge flint 1 Harian sandstone 1 Knob limestone 2 Hignite formation 1 Hartford limestone 1 Jesse sandstone member (of High Rock sandstone * Catron formation) 1 Horton sand J (subsurface) Naese sandstone member (of Jolly limestone (in McLeansboro Lee formation) l formation) 1 Pnckett sandstone member (of Kendrick shale 1 Mingo formation) 1 Kinchloe limestone 1 Red Spring sandstone member Lead Creek limestone l (of Hignite formation) 1 Lewisport limestone 1 Reynolds sandstone member (of Livingstone conglomerate 1 Hignite formation) 1 Lost Creek h'mestone 1 Slater sandstone member (of MagofBn beds l Mingo formation) 1 Mount Gilead sandstone (in Tradewater formation 1 ; group Henshaw formation) 1 in Illinois Mount Gilead shale (in Henshaw Whetstone Creek shale member formation) 1 (of Breathitt formation) 1 Mulford formation l Yellow Creek sandstone member Newburg limestone 1 (of Hance formation) 1 Olive Hill fire clay (in Pottsville Lower and Middle Pennsylvanian formation) 1 Breathitt formation 1 Peach Orchard sandstone l Lower Pennsylvanian Pike sand 1 (subsurface) Caseyville sandstone 1; group in fPine Mountain group 1 Illinois Puncheon Creek sandstone 1 Rockcastle sandstone or con­ fRockcastle group 1 glomerate member (of Lee Saltlick beds * formation) 1 Sebree sandstone (in Carbondale Mississippian formation) l Atherton clay l fSeven Sisters sandstone l Barlow lime * (subsurface) South Carrollton limestone l Barlow sand 1 (subsurface) Beaver Creek "sand" 1 Top Hill sandstone l fBirdsville formation or group ' Vanderburg sandstone (in Hen­ Brooks bed 1 shaw formation) * Cloverport "sand" * (subsurface) Wages sand 1 (subsurface) Corder "sand" 1 (subsurface) Williamsburg sand l (subsurface) Eggners Ferry chert 2 Wild Cat Mountain conglom­ Kentucky shale 1 erate 1 Linietta clay ' Upper Pennsylvanian Major sand 1 (subsurface) Anvil Rock sandstone member Mammoth Cave series 1 (of Lisman formation); (as Morris Mountain shaly member member of McLeansboro for­ (of ) 1 mation *) sand 1 (subsur­ Henshaw formation * face) Lisman formation 1 fOhara limestone member l (of Madisonville limestone 1 mem­ Ste. Genevieve limestone) ber (of Lisman formation) sand 1 (subsurface) Providence limestone 1 member Pellville sand 1 (subsurface) (of Lisman formation) Petersville shale 1 Middle Pennsylvanian fPrinceton limestone 1 Blacksnake sandstone (of Hance Rock House sandstone l formation) * fShot Pouch sandstone l Catron formation l Slickford sand l (subsurface) Cawood sandstone member (of Vanceburg black shale l Hance formation) l Vanceburg sandstone member 1 (of Curlew limestone member (of ) Tradewater formation) 1 Weir sand 1 (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 477

United States Continued United States Continued Kentucky Continued Kentucky Continued Mississippian Continued Lower Mississippian Continued West Point member (of Warsaw Dicks River facies (of New formation) * Providence formation) 2 Upper Mississippian Farmers siltstone member (of Bethel sandstone 1 New Providence formation) 8 fBig Clifty sandstone 1 Forbush Creek facies (of New Bradley sand 1 (subsurface) Providence formation) 2 Buffalo Wallow formation l Frenchburg siltstone member (of Clover Creek limestone 1 Brodhead formation) 2 Fredonia oolite member (of Ste. Ginseng siltstone member (of Genevieve limestone) * Brodhead formation) * Garfield sandstone 1 Greasy Creek facies (of Fort Gasper formation or oolite 1 Payne formation) 8 Girkin formation l Gum Sulphur siltstone member 1 (of New Providence forma­ Hardinsburg sandstone l tion) 8 Jett sand 1 (subsurface) Haldeman siltstone member (of Leitchfield formation * Brodhead formation) 8 Leitchfield marl l Holtsclaw sandstone 1 Levias sandstone member (of Holtsclaw Hill facies (of Brod­ Ste. Genevieve limestone) * head formation) 2 fLockhart formation 1 Hummel facies (of Muldraugh Penrod sand * (subsurface) formation) 8 Sample sandstone or sandstone Indian Fort shale member (of member (of Gasper oolite) ' Brodhead formation) 2 fSloan Valley h'mestone 1 Irvine facies (of Brodhead for­ Somerset shale member (of mation) 2 ) * Junction City facies (of New Spann limestone member (of Providence formation) 2 Pennington shale) 1 Keith Knob facies (of New fStephensport bed l Providence formation) 2 Stephensport (broad usage) 1 Kenwood sandstone l Tar Springs sandstone 1 Lebanon Junction siltstone mem­ Tribune sandstone 1 ber (of Brodhead formation) 8 Wildie sandstone member (of Liberty facies (of Brodhead for­ Warsaw formation) l mation) 2 Lower Mississippian McKinney Knob member (of Athertonville facies (of Brodhead Brodhead formation) 2 formation) 2 Maretburg facies (of Muldraugh Bluestone facies (of New Provi­ formation) 2 dence formation) 2 Morehead facies (of Brodhead Boone Gap facies (of New formation) 8 Providence formation) 8 Muldraugh formation 2 Brodhead formation 8 Olive Hill facies (of Muldraugh Caney Creek member (of Brod­ formation) 8 head formation) 8 Perry Branch siltstone member Christy Creek siltstone member (of Brodhead formation) 8 (of Brodhead formation) 8 Pilot Knob facies (of Brodhead Clay City siltstone member (of formation) 8 New Providence formation) 2 Rolling Fork limestone member Clementsville limestone member (of Brodhead formation) 2 (of Brodhead formation) 2 Rothwell shale member (of Mul­ Combs Mountain siltstone draugh formation) 2 member (of Brodhead for­ Stanton facies (of New Provi­ mation) 2 dence formation) 2 Steels Knob chert facies (of Conway Cut siltstone member (of Muldraugh formation) 2 Brodhead formation) * Devonian Culver Springs shale member Campton sand l (subsurface) (of Brodhead formation) 2 Coralline Falls limestone 1 Cummins Station shale member Irvine sand * (subsurface) (of Muldraugh formation) 2 i Menifee sand 1 (subsurface) 478 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Kentucky Continued Kehtucky Continued Upper Devonian Upper Ordovician Continued Duffin limestone 1 Maysville group l Ragland sand l (subsurface) Million shale 1 Middle Devonian Oregonia division (in Arnheim Beechwood limestone member formation) * (of Sellersburg limestone) J Paint Lick limestone l Boyle limestone 1 Rennix limestone 1 Casey limestone 1 Southgate member (of Latonia Gainesville sand l (subsurface) shale) 1 Harg shale facies (of Portwood Sunset division (in ) 8 formation) 1 Kiddville limestone 1 Tate member (of McMillan for­ Moulder sand l (subsurface) mation) ' Portwood formation 2 Middle and Upper Ordovician Ravenna shale facies (of Port- Winchester limestone 1 wood formation) 2 Middle Ordovician Silurian and Devonian Benson limestone l Panola formation J Blue Grass group l Silurian Bourbon series 1 Holy Cross sandstone 2 Brannon limestone member (of Oldham limestone 1 Cynthiana formation); (as Olympia sand J (subsurface) cherty member of Flanagan Plum Creek clay 1 limestone >) Rodemar sand x (subsurface) Bromley shale (See p. 622) Scottsville sand 1 (subsurface) Camp Nelson limestone l Stanton sand 1 (subsurface) Cornishville limestone member Middle Silurian (of Perryville formation) 1 Alger formation l Curdsville limestone 1 Boyds Creek sand 1 (subsurface) Cynthiana formation 1 Crab Orchard shale l Faulconer limestone member (of Estill clay 1 Perryville formation) 1 Flades clay 1 Fianagan limestone 1 Indian Fields formation 1 Greendale limestone (in Cyn­ 1 thiana formation) 1 Lulbegrud clay 1 Highbridge limestone or group l Ribolt clay shale 1 Jessamine limestone 1 Waco limestone 1 Jessamine series 1 Lower Silurian ,1 formation Brassfield limestone 1 or group Ordovician (see also Cambrian and Logana formation (as bed !) Ordovician) Millersburg limestone member Devils Hollow division (of Lex- (of Cynthiana formation) 1 ington limestone) 2 Nicholas limestone member (of t Kentucky marble * Cynthiana formation) 1 Sulphur Well member (of Cyn- Oregon limestone 1 thiana formation) 2 formation 1 Sunnybrook sand 1 (subsurface) Perryville formation 1 Upper Ordovician Rogers Gap division (in Cyn­ Bardstown reef (in Liberty thiana formation) ' formation) 1 Salvisa limestone member (of Caney sand J (subsurface) Perryville formation) 1 Cumberland sandstone l Tyrone limestone ' Economy member (of Latonia fWilmore limestone ' shale) 1 Woodburn limestone member Fisherville coral reef (in Waynes- (of Cynthiana formation); (as ville limestone) 1 phosphatic member of Flana­ Fowler limestone 1 gan Limestone *) Garrard sandstone l Lower Ordovician Gilbert limestone (in McMillan White Oak sand l (subsurface) formation) l Cambrian and Ordovician Gratz shale J Beech Bottom sand * (subsur­ Haggard limestone (in Cumber­ face) land sandstone) 2 Middle Cambrian Latonia shale 1 Lincoln sandstone 2 (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 479

United States Continued United States Continued Louisiana Louisiana Continued Recent Eocene, upper Continued Lebeau member (of Le Moyen Verda member (of Yazoo clay) 2 formation) 2 (subsurface and Youngs Bluff bed 1 isurface) Zenoria lentil (in Verda member Le Moyen formation2 (subsurface of Yazoo clay) 2 and surface) Eocene, middle Mermentau member (of Le t Arcadia clays l Moyen formation) 2 (subsurface Cane River formation 1 and surface) Cock field formation 1 Plei& tocene fCockfield lignite 1 Bentley formation 2 Creola member (of Yegua forma­ Montgomery formation 2 tion) 2 Pontchartrain clay 1 Dodson member (of Cook Moun­ Port Hudson formation 1 tain formation) 2 Prairie formation 2 Little Natches member (of Cook Williana formation 2 Mountain formation) 2 Tertiary Milams member (of Cook Moun­ fSparta sands l tain formation) 1 Pliocene fMinden formation l Foley formation 2 (subsurface) t Mount Lebanon formation l Mamou member (of Foley forma­ fSt. Maurice formation * tion) 3 (subsurface) Saline Bayou member (in Clai- Steep Gully member (of Foley borne group) 2 formation) 2 (subsurface) Sparta sand l Miocene Eocene, lower Bl punts Creek member (of Flem­ Bayou Lenann member (of ing formation) 2 Pendleton formation) 2 Carnahan Bayou member (of Beulah Church sand lentil (in Fleming formation) 2 Slaughter Creek member of Cassel Hill member (of Catahoula Pendleton formation) 2 formation) 2 High Bluff member (of Pendle­ Castor Creek member (of Flem­ ton formation) 2 ing formation) 2 Marthaville formation 2 Cialk Hills member (of Catahoula Pearson glauconite member (of formation) 2 Sabinetown formation) 2 Dough Hills member (of Fleming fSabine formation 1 formation) 2 Slaughter Creek member (of Lena member (of Fleming forma­ Pendleton formation) 2 tion) 2 Stone Coal Bluff lignite (in Williamson member (of Fleming Slaughter Creek member of formation) 2 Pendleton formation) 2 Paleocene Mosley Hill formation 2 Benson facies (of Cow Bayou Eocene member of Logansport forma­ t Mansfield group * tion) 2 Eocene, upper Bisteneau member (of Hall Sum­ Bayou Calamus lentil (in Verda mit formation) 2 member of Yazoo clay) 2 Chemard Lake lignite lentil (of Danville Landing group 1 or Naborton formation) 2 beds 1 Cow Bayou member (of Logans­ Kimbrel bed * port formation) 2 Montgomery bed (in Jackson Dolet Hills member (of Logans­ formation) 1 port formation) 2 Mossy Ridge lentil (in Verda Grand Bayou member (of Hall member of Yazoo clay) 2 Summit formation) 2 Myatt lentil (in Verda member Hall Summit formation 2 of Yazoo clay) 2 Lime Hill member (of Logans­ Saddle Bayou lentil (in Verda port formation) 2 member of Yazoo clay) 2 Logansport formation 2 Tullos clay member (of Yazoo Lojggy Bayou member (of Hall clay) 2 Summit formation) 2 Union Church transition phase Lula facies (of Cow Bayou mem­ (in Tullos member of Yazoo ber of Logansport formation)2 clay) 2 Naborton formation 2 480 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Louisiana Continued Continued Cretaceous(f) Devonian St. Landry marble > Kineo rhyolite * Upper Cretaceous t Mapleton granite 1 Haynesville sand l (subsurface) group (as sandstone') Monroe gas rock l (subsurface) Prettymarsh diorite * Oakes sand l (subsurface) Seboomook formation (as slate1) Shreveport gas sand 1 (subsurface) Devonian(f) Vivien sand 1 (subsurface) Agamentieus complex l Zwolle marl* (subsurface) Berwick quartz diorite 1 Upper Cretaceous (?) Cape Neddick gabbro 1 Bayou Chicot limestone 1 Castle Hill andesite 1 t Winnfield limestone * Castle Hill tuff 1 Lower Cretaceous f Chapman trachyte * Bodcaw sand lens 1 (subsurface) Edmunds Hill andesite 1 Davis oil and gas horizon 1 (sub­ Haystack rhyolite 1 surface) Hedgehog trachyte * Dillpn gas horizon l (subsurface) Hobart Hill andesite l Dixie oil horizon l (subsurface) Rangeley conglomerate * Eubanks sand > (subsurface) York Harbor biotite granite l Herndon oil sand 1 (subsurface) Upper Devonian Hosston formation 2 (subsurface) Mapleton sandstone 1 Rodessa formation 2 (subsurface) Perry formation 1 SHgo formation 2 (subsurface) Pre-late Devonian Tillman sand lens * (subsurface) Ore Mountain diorite 2 Wickett oolitic zone 1 (subsurface) Lower Devonian Upper Jurassic Chapman sandstone 1 Bossier formation 8 (subsurface) Fort Kent shale 2 Cotton Valley group2 (subsurface) Square Lake limestone 1 Haynesville formation 2 (sub­ Silurian and Devonian surface) fCobscook series * Shongaloo member (of Schuler Cobscook Bay series 1 formation) 2 (subsurface) Silurian Pennsylvanian (?) Aroostook limestone 1 Morehouse formation 2 (sub­ Ashland limestone * surface) Ashland shale J Maine fCampobello group * Paleozoic Chesuncook limestone 1 South Mapleton andesite 1 Dennys formation 1 Upper Paleozoic Frenchmans Bay series 2 Cadillac granite 8 fLeightons Cove series 1 Lobster Lake formation (asseries1) Post-Carboniferous Mars Hill conglomerate 1 Biddeford granite 1 t Moose Island shale 2 Burnt Meadow syenite * Pembroke formation 1 Carboniferous (f) Brave Boat Harbor biotite granite 1 Ripogenous series 1 Gushing granodiorite 1 Sheridan sandstone J Drews Lake granite J Vassalboro sandstone 1 Katahdin granite 1 Vinalhaven rhyolite 1 Pre-Carboniferous(f) Waterville shale (also slate) 1 Falmouth pegmatite 1 Winthrop phyllite 2 Westbrook granite J Silurian(f) Pennsylvanian (f) Hope limestone 1 Cape Elizabeth formation 1 Upper Silurian and Lower Devonian group 1 Ireson felsite * Diamond Island slate l granite l Jewel! phyllite l Upper Silurian Mackworth slate l Eastport formation l Scarboro phyllite 1 Hersey red shale member (of Spring Point greenstone 1 Pembroke formation) 1 Spurwink limestone 1 Leighton gray shale member (of Towow formation 1 Pembroke formation) 1 Devonian or Carboniferous Seigas sandstone 2 Waldo granite 2 Thorofare andesite l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 481

United States Continued United States Continued Maine Continued Maine Continued Middle and Upper Silurian Age (?) Continued Edmunds formation l Noisy Brook gneiss 8 Middle Silurian Phipsburg limestone * Ames Knob formation l Portland clays l Danville injection gneiss 2 Quoggy Joe quartz trachyte l Deer Rips time-silicate gneiss 2 Seawall metafelsite 2 Jay granite 1 Traveller rhyolite * Quoddy shale l Tumbledown gneiss 2 Taylor Brook injection gneiss 2 Uncle Israels granite 2 Probably Ordovidan and Silurian Winterport granite type 2 Berwick formation (as gneiss J) Woodland trachyte l Eliot formation (as slate ') Maryland Kittery quartzite l Pleistocene and Recent Cambrian or Ordovidan McHenry formation * Rockland formation 1 Pleistocene Rockport limestone member (of Beaverdam sand 2 Rockland formation) 1 Cornfield Harbor clays ! Weskeag quartzite member (of Parsonsburg sand 2 Rockland formation) 1 Sunderland formation * Cambrian and Ordovidan Talbot formation l Taconic limestone 1 Walston silt 2 Cambro-0rdovidan(?) Wicomico formation l Androscoggin gneiss and schist 2 Pliocene(f) Bates limestone 2 Brandywine formation l or gravel Hill Ridge biotite schist 2 Miocene(f) Minwah limy gneiss 2 North Keys sand 3 Sabattus garnet schist 2 Miocene, middle and upper Stetson Brook limestone 2 Chesapeake group l Tacoma series 2 St. Marys formation 1 Thorncrag limy gneiss 2 Miocene, middle Cambrian(f) Calvert formation * Battie quartzite 1 Choptank formation l Calderwood formation 1 Fairhaven diatomaceous member Castine volcanics 1 (of Calvert formation) 1 Coombs limestone member (of Plum Point marl member (of Islesboro formation) 1 Calvert formation) 1 Islesboro formation 1 Eocene (see also Upper Cretaceous North Haven greenstone 1 and Eocene) Pejepscot gneiss 2 fPiscataway sands * Penobscot formation 1 Eocene, upper Lower Cambrian Piney Point formation 2 (subsur­ Grand Falls formation (Rudolph face) Ruedemann and E. S. C. Eocene, lower and middle Smith, 1935, Am. Jour. Sci., Marlboro clay member (of Nan- 5th ser., v. 30, no. 178, p. 354) jemoy formation) l Cambrian or Precambrian(f) Nanjemoy formation l Cranberry Island series 1 Potapaco clay member (of Nan­ Schooner Head series 1 jemoy formation) l Sutton Island series 1 Eocene, lower Precambrian and Silurian Piscataway indurated marl mem­ Bar Harbor series 1 ber (of Aquia formation) 1 Precambrian or Cambrian Paleocene Ellsworth schists 1 Brightseat formation 2 Precambrian and later Upper Cretaceous and Eocene Bartlett Island series 1 fSevern formation 1 Precambrian Upper Cretaceous Branch Pond gneiss 1 Albirupean black marl 1 schist 1 fAlbirupean formation 1 Knox gneiss l Magothy formation 1 Age(f) Patapsco formation l Aroostook Falls diabase 1 fSassafras River greensand l Brownville slate l Lower Cretaceous Byron schist 2 Arundel formation 1 or clay Mars Hill diabase l fBaltimorean formation l 482 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Maryland Continued Maryland Continued Lower Cretaceous Continued Pennsylvanian Continued Federal Hill beds (in Patapsco Mount Savage sandstone (in formation) 1 Allegheny formation) l Hawkins Point clays 1 Redstone sandstone (in Monon- Patuxent formation l gahela formation) l Upper Triassic Sampson Rock sandstone (in Buck Lodge diabase 1 Pottsville formation) 1 Emmitsburg facies 1 Savage formation ' fPotomac marble : Thomas limestone (in Cone­ Taneytown facies l maugh formation) * Upper Paleozoic(f) Thomas sandstone (in Cone­ Ellicott City granite 1 maugh formation) * "Post-Gknarm" Wellersburg limestone (in Cone­ Guilford granite 2 maugh formation)* Gunpowder granite l Westernport sandstone (in Alle­ Laurel migmatite 2 gheny formation) 1 Port Deposit gneiss 1 or granite Woods Run shale (in Conemaugh Sykesville granite l formation) 1 Upper Devonian Lower Pakozoic(?) Avilton conglomerate * Cockeysville marble 1 Parkhead sandstone member (of Glenarm series 1 Jennings formation) 1 Ijamsville phyllite 2 Lower Devonian Setters formation 1 fCorrigan formation * Silver Run limestone 2 Shriver chert l Urbana phyllite 2 Silurian Wakefield marble 2 Cedar Cliff limestone lens (in Permian Wills Creek shale) l fFrostburg formation 1 Cresaptown iron sandstone l Carboniferous(f) Indian Spring red shales or sand­ Woodstock granite l stone (in Tonoloway lime­ Pennsylvaman stone) 1 Barton limestone (in Conemaugh Rabble Run sandstone member formation) * (of McKenzie formation) l Barton red shale (in Conemaugh Tonoloway limestone 1 formation) l Wills Creek shale 1 Barton sandstone (in Conemaugh Middle Silurian formation) 1 Cumberland facies (of Clinton Bluelick limestone (in Cone­ formation) 2 maugh formation)» McKenzie formation or lime­ Borden sandstone (in Mononga- stone * hela formation) 1 1 Clarysville sandstone (in Cone­ Ordovician(f) maugh formation) * Cardiff conglomerate 1 Ellerslie fire clay (in Allegheny Post-Lower Ordovician formation) 1 Baltimore gabbro 2 Ellerslie sandstone (in Allegheny Middle Ordovician formation) l Row Park limestone 2 Friendsville black shale (in Cone­ St. Paul group 2 maugh formation) 1 Lower Ordovician Hoffman limestone (in Cone­ Grove limestone 1 maugh formation) l fLe Gore limestone 1 Hoffman sandstone (in Cone­ Cambrian(f) maugh formation) l Sugarloaf Mountain quartzite 2 Lonaconing sandstone (in Cone­ Upper Cambrian maugh formation) * Big Spring Station member (of Luke clay (in Allegheny forma­ Conococheague limestone) 2 tion) l limestone l Meyersdale limestone (in Cone­ Lower Cambrian maugh formation) l Sugarloaf sandstone ' Montell sandstone (in Allegheny Weverton quartzite or formation formation) 1 (as sandstone !) Mount Savage fire clay (in Potts- Precambrian ville formation) l Baltimore gneiss 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 483

United States Continued United States Continued Maryland Continued Massachusetts Continued Precambrian Continued Lower Paleozoic Cockeysville volcanics 1 fNahant gabbro 1 Deer Creek quartzite 1 fNew Bedford gneiss 1 Hartley augen gneiss 1 fSaugus granodiorite or quartz Relay quartz diorite l diorite 1 fState line 1 Lower Pakozoic(?) fSusquehanna mica schist 1 Dedham granodiorite 1 Precambrian(l} Natick granite 1 Catoctin metabasalt, greenstone, Salem gabbro-diorite l or formation (as schist') Carboniferous or Post-Carboniferous Ilchester granite 1 fBolton gneiss 1 Libertytown metarhyolite 2 Coys Hill granite l Sams Creek metabasalt 2 Dana diorite 1 Age(f) Dracut diorite 1 Bear Island granodiorite 2 Fitchburg granite 1 Frenchtown diorite l Hardwick granite 1 Kensington granite-gneiss 2 Hubbardston granite 1 Rowlandville granite l Middlefield granite l Massachusetts Millbury limestone l Pleistocene New Salem aplite 1 Aquinnah conglomerate 1 "New Salem serpentine l fBarnstable series 1 North Amherst granite 1 Dukes boulder bed 1 Pelham granite 1 Middleboro clay 1 Pelham quartzite l fNashaquitsa series 1 Prescott diorite 1 Moshup till member (of Jameco Swan Pond granite l formation) 1 "Vernon gneiss 1 fNaushon series 1 Wachusett gneiss 1 Sankaty sand 1 Wilbraham gneiss l fSankaty Head beds 1 Carboniferous (see also Devonian or Taunton clays * Carboniferous) fTisbury beds or gravel 1 granite 1 fTruro series 1 Attleboro sandstone l Weyquosque formation 1 Beverly syenite 1 Tertiary and Quaternary Boylston schist 1 Cape Cod series 1 Brimfield schist 1 Upper Cretaceous Harvard conglomerate lentil (in Indian Hill series 1 Worcester formation) 1 Triassic ( Harvard granite l Turners Falls sandstone 2 Nashoba formation 2 Upper Triassic fNorfolk Basin series l fBlack Rock diabase 1 Oakdale quartzite 1 Chicopee shale 1 Oxford schist 1 Deer field diabase 1 Paxton quartz schist 1 Granby tuflf 1 Quabin quartzite 1 Greenfield bed 1 Rocky Woods conglomerate 1 Hampden diabase 1 fSalem syenite l Holyoke diabase 1 Squam granite 1 Leverett breccia 1 fWamsutta volcanics l Longmeadow sandstone 1 Ware schist 1 Medford diabase 1 Worcester formation (as phyl- Mount Toby conglomerate J lite !) Sugarloaf formation (as arkose l) fWorcester quartzite J Pre-Triassic Carboniferous (f) Amherst schist 1 Belchertown tonalite 1 Erving hornblende schist 1 Williamsburg granodiorite 1 Joshua schist 2 Pre-upper Carboniferous(f) Whately bed l Dracut nprite 1 Whitmores Ferry amphibolite 1 Pennsylvanian Upper Pakozoic(f) Bellingham conglomerate l Straw Hollow diorite 1 Dighton conglomerate l Middle Paleozoic Mansfield beds l Dry Hill granite gneiss 2 Pondville conglomerate 1 Poplar Mountain gneiss 2 Seekonk beds 1 504835 59 6 484 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Massachusetts Continued Massachusetts Continued Pennsylvanian Continued Ordovidan Continued Seekonk conglomerate * Savoy schist 1 beds l Westfield serpentine l Wamsutta formation 1 Middle Ordovidan Westyille shale l Berkshire schist 1 Mississippian (?) fCheshire schist 1 Quincy granite 1 Cambrian and Ordovidan Mississippian(f) or older Egremont limestone * Monson gneiss (as granodiorite*) f series * Devonian or Carboniferous Stockbridge limestone 1 or group Blue Hill granite porphyry 1 Cambrian and younger and older(f) Boston Bay group 1 fBlue Hills complex 1 Brighton melaphyre 1 Cambrian(?) Brookline conglomerate member Milton quartzite 1 (of Roxbury conglomerate) 1 Upper Cambrian Cambridge slate 1 Green Lodge formation 1 fCape Ann granite 1 Middle Cambrian Dorchester slate member (of Braintree slate l Roxbury conglomerate) 1 Lower Cambrian to Lower Ordo­ Lynn volcanic complex 1 vidan Mattapan volcanic complex 1 fBerkshire limestone 1 fNeponset conglomerate 1 Lower Cambrian fPeabody granite 1 Cheshire quartzite 1 Roxbury conglomerate 1 Dalton formation l Shawmut group 1 Hoppin slate 1 fSomerville slate * Nahant limestone * fSquantum slates 1 'Nahant schist 1 Squantum tillite member (of "Shutesbury serpentine 1 Roxbury conglomerate) 1 1 Veymouth formation l Tufts quartzite member (of Cam­ Lower Cambrian(f) bridge slate) 1 Hoosae schist l fWest Roxbury slate 1 Rowe schist 1 Devonian(?) Precambrian or Upper Ordovidan Ironstone quartz diorite 1 Newburyport quartz diorite 1 fJoes Rock granite 1 Precambrian or Cambrian Milford granite 1 Lynnfield serpentine 1 Sharon syenite 1 Precambrian Wolfpen tonalite 1 Becket granite gneiss 1 Upper Devonian(f} Berkshire County series 1 Ayer granodiorite (as granite *) fBlan[d]ford limestone 1 Probably Lower Devonian Coles Brook limestone l Newbury volcanic complex 1 "East Lee gneiss 1 Silurian and Devonian(f) East Lee limestone > Bernardston formation ' "Goose Pond limestone 1 Silurian "Grafton quartzite 1 Granville enstatite serpentine 1 Greylock series 1 t Greylock limestone l Hinsdale gneiss 1 Silurian(f) fHinsdale limestone 1 Goshen schist 1 fHop Brook limestone 1 Leyden argillite l Kendall Green slate l Lower Silurian Lee quartz diorite 1 Russell serpentine x Lincoln slate 1 Ordovidan and Silurian Marlborp formation l Merrimack quartzite 1 Northbridge granite gneiss 1 Ordovidan and Silurian(?) fOtis limestone 1 Conway formation (as schist J) Quincy syenite l Ordovidan Stonybrook quartzite 1 Bellowspipe limestone l fSutton gneiss 1 fBellowspipe quartzite ! fTyringham gneiss > Chester amphibolite 1 Waltham gneiss 1 fEverett schist 1 Washington gneiss ' Greylock schist 1 Woburn formation l Hawley schist 1 Precambrian(f) fPlainsfield schist 1 Westboro quartzite 1 INDEX TO THE GEOLOGIC NAMES OP NORTH AMERICA 485

United States Continued United States Continued Massachusetts Continued Michigan Continued Age(f) Middle and Upper(?) Devonian Blandford serpentine and pyrox- Fetter Farm formation 1 enite l 1 ' Naugus Head series * Middle Devonian Pelham serpentine l Afton bed 2 "Shelburne gneiss l Alpena limestone l 'Worcester County gneiss 1 (as mem­ Michigan ber of Detroit River dolomite1) Pennsylvanian Beebe School formation 3 Eaton sandstone member (of * ) 2 Black Lake lagunal facies 3 Grand Ledge cyclothem (in Sagi­ 3 naw formation) 3 Charlevoix stage l 2 (as dolo­ Ionia sandstone l member (of mite l) Saginaw formation) Dock Street clays * fJackson formation 1 1 or forma­ 1 tion Saginaw formation l Flat Rock dolomite member (of Woodville member (of Saginaw ); (as member formation); (as sandstone J) of Detroit River dolomite ') Lower Pennsylvanian Four Mile Dam formation 2 Verne cyclical formation (includ­ l ing Verne limestone or shale Filer sandstone lentil (in Am­ member) a herstburg formation) * (subsur­ face) Mississippian (see also Upper De­ Genshaw formation * vonian and Mississippian; and Grand Lake member 1 (of Pres- Upper Devonian and Lower que Isle series) JMLirSsi/ssip'pian) Gravel Point stage l l Gorbut member (of Gravel Point 2 formation) 2 Forestville shale l Eillians member (of Genshaw Grand Rapids group * formation); (as limestone ') fGrand Rapids limestone 1 Koehler limestone 3 Huron gritstone l Little Traverse Bay limestone 1 Manistee limestone * Long Lake series ' * or forma­ Mackinac breccia (as lime­ tion stone !); contains discrete Michigan formation l blocks of rocks of Silurian to Napoleon member (of Marshall Middle Devonian ages sandstone); (as sandstone J) Mackinaw limestone 1 Point aux Barques sandstone 1 Marvin Quarry bed 2 Point aux Barques 1 Newton Creek limestone 2 (sandstone) Norway Point formation * Point aux Gres limestone 1 Norwood shale 3 Port Austin sandstone 1 Partridge Point formation l Richmondville sandstone l Petoskey limestone l Rock Falls series l Presque Isle series l Lower Mississippian Richfield member (of Lucas Hardwood Point shales and flags 2 formation) a (subsurface) Huron City sandstones and Rockport limestone 1 shales 2 Rockpert Quarry limestone 3 Lighthouse conglomerate 3 or for­ Upper Devonian and Lower Missis­ mation 2 sippian Saginaw sand 1 (subsurface) * Thunder Bay series 1 l Whitefish Bay member (of fHuron group 1 Alpena limestone stage) s Upper Devonian Lower Devonian tSt. Clair shale » 2 l Silurian and Lower Devonian Middle and Upper Devonian fMonroe beds, formation, or Traverse formation l or group group * 486 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Michigan Continued Michigan Continued Silurian Precambrian Continued Manitoulin limestone l Arcadian amygdaloid 1 Raber bed 2 Arcadian flow 1 Toll Pit beds 1 Arnold amygdaloid 1 Upper Silurian Arnold flow 1 Point aux Chenes formation 2 Ashbed amygdaloid ] member Ashbed flow 1 (of Bass Islands dolomite) 1 Ashbed group 1 St. Ignace formation 2 Atlantic amygdaloid 1 Middle Silurian Atlantic flow l Burnt Bluff formation 1 Baltic amygdaloid 1 Cordell member l (of Manistique Baltic conglomerate 1 formation) Baltic flow » Engadine dolomite 1 Baltic sandstone l Fiborn limestone 1 Baltic West amygdaloid 1 Hendricks series 1 Baltic West flow l Manistique series 1 Bessemer sandstone or quartzite 2 Schoolcraft member ' (of Man­ Bijiki iron-formation member istique formation) (of Michigamme slate) 1 Upper Ordovidan Bohemia conglomerate ' Bay de Noc member (of Stoning- Bohemia porphyrite 1 ton beds) 1 Bohemian Range group 1 Big Hill beds 1 fBone Lake crystalline schist 1 Bills Creek beds 1 fBoston conglomerate 1 Ogontz member (of Stonington Brier slate member (of Vulcan beds) » iron-formation) 1 Stonington beds 1 Brule schists and volcanics 1 Middle Ordovidan Butler amygdaloid l Bony Falls member (of Black Butler flow * River formation) 2 Caledonia conglomerate l Chandler Falls member (of Tren­ Calico amygdaloid l ton formation) 2 Calico flow 1 Escanaba limestone 1 Calumet amygdaloid 1 Escanaba River group 2 fCalumet conglomerate 1 Haymeadow Creek member (of Calumet flow 1 ) 2 Calumet and Hecla conglom­ Groos Quarry member (of Tren­ erate 1 ton formation) 2 f Cascade formation 1 Sheridan formation l f Central group 1 Upper Cambrian and Lower f Central Mine conglomerate 1 Ordovidan Central Mine group l Hermansville limestone 1 Central Valley beds 1 Upper Cambrian fChippewa felsite 1 fEastern sandstone 1 fChippewa porphyry 1 Lake Superior sandstone 1 Clarksburg volcanics 1 member Munising sandstone * (of Michigamme slate) Ste. Marie sandstone 1 Copper City flow (in Portage St. Marys sandstone 1 Lake lava series) 2 Precambrian or Cambrian Copper Harbor conglomerate (as Jacobsyille sandstone l group ») Precambrian Copps group l Ajibik quartzite l Corning Creek zone (in Negaunee Albany conglomerate 1 formation) 1 Albany and Boston amygdaloid 1 Crystal Falls formation 1 fAlbany and Boston conglomer­ f Crystal Falls series l ate 1 Curry iron-bearing member (of Albany and Boston flow 1 Vulcan iron-formation) 1 Algomah amygdaloid 1 fDeer Lake conglomerates * Algomah flow 1 Douglas amygdaloid 1 Allouez conglomerate 1 Douglas flow l Amasa formation 2 Eagle River group 1 tAntoine dolomite l Evergreen amygdaloid 1 Anvil ferruginous chert member Evergreen flow 1 (of Ironwood iron-formation) 1 Felch formation (as schist !) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 487

United States Continued United States Continued Michigan Continued Michigan Continued Precambrian Continued Precambrian Continued fFelch Mountain iron-bearing Lake H anbury slate group 1 series 1 Lake Shore trap 1 Fern Creek formation 2 fLake Superior group l Ford River granite 2 Loretto slate l member (of Vul­ Forest amygdaloid 1 can iron-formation) Forest conglomerate l Mabb amygdaloid 1 Forest flow > Mabb flow l 1 Makasin Hill zone (in Negaunee fGogebic series 1 formation) 1 Goodrich quartzite 1 Mandan amygdaloid 1 Goose Lake slate 1 Mandan flow 1 t Grand Portage amygdaloid 1 Manitou amygdaloid 1 fGrand Portage flow 1 Manitou flow 1 Gratiot flow (in Portage Lake Mansfield iron-bearing slate lava series) 2 member (of Hemlock forma­ fGraveland formation l tion) ; (as formation or slate ') Great conglomerate l fMareniscan series 1 fGreat Copper Harbor conglom­ Marquettan series 1 erate 1 fMarquette series 1 Greenstone flow 1 Mass amygdaloid 1 Greenwood iron-formation l Mass flow 1 member (of Michigamme slate) Mayflower amygdaloids 1 Gwinn series 1 Mayflower flows 1 fHanbury slate 1 Medora amygdaloids 1 Hancock amygdaloid 1 Medora flow l Hancock conglomerate l Menominee group (as series J) Hancock flow 1 Merchants amygdaloid 1 Hancock West conglomerate 1 Merchants flow 1 Hemlock formation (as green­ fMesnard epidote 1 stone *) fMesnard formation l Holyoke conglomerate 1 Mesnard quartzite l Holyoke formation 1 Michigan conglomerate 1 Houghton conglomerate 1 Michigamme slate l Huginnin porphyrite 1 f Michigamme jasper 1 Iron River iron-formation mem­ Minesota conglomerate 1 ber (of Michigamme slate) 1 Minesota trap 1 Ironwood iron-formation 1 Minong breccia 1 Iroquois flow (in Portage porphyrite 1 Lava series) 2 Minong trap l flshpeming formation 1 Mona schist l Island Mine conglomerate 1 Montreal amygdaloid 1 Isle Royale amygdaloid 1 Montreal flow 1 Isle Royale flow 1 t Mount Bohemia conglomerate l Isle Royale trap 1 Mount Houghton felsite 1 or Jasper Knob zone (in Negaunee quartz porphyry 1 formation) 1 Mount Mesnard quartzite l fJohnson Creek conglomerate 1 National sandstone 1 Kearsarge amygdaloid 1 fNebraska conglomerate l Eearsarge conglomerate 1 Negaunee iron-formation l Kearsarge flow 1 New Arcadian amygdaloid 1 Kearsarge trap 1 New Arcadian flow 1 Kearsarge West amygdaloid 1 New Mass amygdaloid 1 Kearsarge West flow 1 New Mass flow 1 Keweenawan series 1 New Mayflower amygdaloid 1 Kingston conglomerate 1 1 Kitchi schist 1 Norrie ferruginous chert member Knowlton amygdaloid 1 (of Ironwood iron-formation) l Knowlton flow 1 North amygdaloid 1 Kona dolomite 1 North flow 1 Lac La Belle conglomerate 1 North Butler amygdaloid 1 Lake amygdaloid 1 North Butler flow 1 Lake flow l North Lake zone (in Negaunee Lake Enchantment sediments 2 formation) x 488 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Michigan Continued Michigan Continued Precambrian Continued Precambrian Continued North Star conglomerate ' Superior flow 1 Norway limestone 1 Superior West amygdaloid 1 Norwich conglomerate l Superior West flow 1 Norwich trap 1 Toltec trap 1 Ogima amygdaloid 1 Tomahawk amygdaloid l Ogima flow 1 Torch Lake amygdaloid 1 Ohio Trap Rock traps 1 Torch Lake flow 1 Old Colony amygdaloid 1 Traders iron-bearing member (of Old Colony flow 1 Vulcan iron-formation) 1 Old Colony sandstone l Tyler slate 1 Old Pewabic amygdaloid 1 fVictoria amygdaloid 1 Old Pewabic flow » { flow 1 Oneco amygdaloid 1 Vulcan iron-formation 1 Oneco flow 1 West Minesota conglomerate l fOneida conglomerate 1 West Minesota trap 1 Osceola amygdaloid ' Wewe slate * Osceola flow ' Winona amygdaloid 1 Outer conglomerate l Winona conglomerate 1 Pabst member (of Tyler slate) 1 Winona flow J Paint slate 1 granite l Paint River greenstones 2 Wolf Lake schist l Palmer gneiss 1 Wolverine amygdaloid l Palms quartzite 1 Wolverine sandstone l Pentoga greenstones 8 Wyandot amygdaloidj1 Pewabic amygdaloid 1 Wyandot flow 1 Pewabic flow 1 Wyandot No. 8 amygdaloid 1 Pewabic West conglomerate 1 Wyandot No. 8 flow 1 t Phoenix Mine group * Yale member (of Ironwood iron- Portage Lake lava series 2 formation) l Praysville porphyry l Age(f) Presque Isle granite l Commonwealth ore formation Princeton series 1 Huron Bay slates * Quincy amygdaloid 1 L'Anse series l Quincy flow 1 Minnesota Quincy Pewabic amygdaloid 1 Pleistocene Quincy Pewabic flow l Itascan till l Quinnesec formation (as green­ clay l stone J) Lake Agassiz silt 1 Quinnesec ore-formation * Mankato drift (see Mankato sub- Randville dolomite 1 stage !) t Republic formation 1 Paulian till» Republic granite ' West Union gravel a Republic quartzite 1 Upper Cretaceous fRockland sandstone 1 Big Cottonwood formation 1 fSt. Louis amygdaloid 1 Coleraine shale or formation 2 St. Louis conglomerate l Lower Cretaceous fSt. Louis flow » Ostrander member (of Dakota fSt. Marys epidote 1 formation) 2 Saunders formation 1 Ordovician Scales Creek flow (in Portage Minnesotan series 1 Lake lava series) 2 fShakopee group 1 Shawmut amygdaloid 1 Upper Ordovician Shawmut conglomerate 1 Wykoff beds * Shawmut flow 1 Middle Ordovician Siamo slate 1 Carimona member (of Platteville South Butler amygdaloid 1 formation) 2 South Butler flow 1 Cummingsville member (of South Pewabic amygdaloid 1 Galena formation) 2 South Pewabic flow 1 Minneapolis limestone 1 fState Road conglomerate 1 Prosser member (of Galena dolo­ Sturgeon quartzite 1 mite) ; (as limestone J) Superior amygdaloid * St. Peter sandstone l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 489

United States-^Continued United States Continued Minnesota Continued Minnesota Continued Middle Ordovician Continued Precambrian Continued Stewartville massive member Chengwatana series * (of Galena dolomite); (as dolo­ fCoutchiching series 1 mite *) fClouquet slate * Lower Ordovician fCourtland quartzite * Blue Earth siltstone l Crooked Lake granite pebble fElevator B sandstone 1 (sub­ conglomerate 2 surface) Wing formation * Kasota sandstone 1 Crystal gray quartz monzonite 2 Root Valley sandstone 2 Cuyuna member (of Crow Wing * formation) 1 Cambrian fCuyuna series * Lansingan series 2 Dam Lake quartzite * Cambrian(f) Deerwood iron-formation mem­ New Ulm conglomerate * ber (of Virginia slate) l Upper Cambrian Dike Lake slate 2 Bad member (of Franconia Disappointment Mountain con­ sandstone) 1 glomerate 2 Dresbach sandstone1 Duluth gabbro l f Dresbach shale 1 fDuluth group 1 Franconia sandstone 1 Embarrass granite l Galesville member l (of Dresbach Ely greenstone l formation) Emily member (of Crow Wing *; sandstone formation) 1 member (of Trempealeau for­ Ensign Lake green slates, tuffs, mation) in Michigan. and graywackes 2 Judson member (of St. Lawrence Ensign-Snowbank Lake agglom­ formation) 2 erate 2 Mill Street conglomerate (in Ester Lake graywackes, slates, Woodhill member of Franconia and tuffs 2 f ormation) 2 Fond du Lac sandstone * Minneiska member (of Franconia Freedhem tonalite 2 formation) 2 Giants Range granite 1 Nicollet Creek member (of St. Grand Portage graywacke * Lawrence formation) 2 Grant conglomerate l Reno member (of Franconia for­ Gunflint iron-formation l mation) 2 Hillman gneissoid tonalite 2 fSt. Croix formation 1 Hinckley sandstone 1 St. Croixan series l Hunters Island iron-bearing fSt. Lawrence limestone or dolo­ series 1 mite member* (of Trempealeau Jasper conglomerate 1 formation) Jasper Lake greenstone conglom­ St. Lawrence member (of Trem­ erate or agglomerate 2 pealeau formation); (as forma­ fKawishiwin agglomerate, green­ tion i) stones, or series 1 Taylors Falls member (of Fran­ Eeewatin series 1 conia formation) 2 Kekekabic granite * Van Oser member (of Jordan Kekekabic tuffs, agglomerates, sandstone) 2 slates, and andesite porphyry * Precambrian fKettle River sandstone 1 Agamok sediments 2 Keweenaw Point volcanic series 2 Agate Bay group 1 Knife Lake group (as series ') Aitkin formation 1 fKnife Lake slate l Amoeba Lake graywackes, slates, Koochiching granite * and tuffs 2 Lester River group * Bassimenan Lake granite 1 McGrath gneiss 2 Basswood granite 1 Manitou series 1 "Beaver Bay diabase 1 "Marquettian system 1 liiwabik iron-formation ' "Mesabi gabbro 1 Burntside granite gneiss * "Mesabi series * Cabotian * (lavas, red rock, and "Mississippi slate series * gabbro) conglomerate 2 Carltonian formation l Morton granite gneiss 2 Carlton slate 2 fNew Ulm quartzite 1 490 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Minnesota Continued M ississippi C ontinued Precambrian Continued Miocene Continued Ogishke conglomerate (as mem­ fGrand Gulf sandstone * ber of Knife Lake slate *) Homochitto member (of Pasca- t Palisade porphyry * goula formation) 2 Peebles granite f acies (of Ogishke Knoxville member (of Pasca- conglomerate) 2 goula formation) 2 Pewabic quartzite 1 t Mississippi clays l fPipestone quartzite * Pascagoula clay 1 Pokegama quartzite 1 Miocene(f) Prairie River granite 1 t Bayou Pierre phase * Puckwunge conglomerate l Catahoula sandstone 1 formation fPuckwunge slate l or tuflF Red Rock member l (of Keween- Miocene, lower and middle awan series) Hattiesburg clay 1 fRedstone quartzite 1 Miocene and Oligocene(f) Saddlebag Lake conglomerate 2 t Grand Gulf group l Saganaga granite 1 Oligocene and Miocene(f) Saganaga syenite * Catahoula group l St. Cloud gray granodiorite 2 Oligocene St. Cloud red granite 2 Limestone Creek beds l fSt. Louis River gabbro 1 Limestone Creek group * fSt. Louis River slate 1 Oligocene, upper Snowbank granite l Chickasaway limestone (as marl Soudan iron-formation 1 member of Byram marl J) South Range member (of Vir­ Oligocene, middle ginia formation) 2 Bucatunna clay member (of By­ Stearns magma series 2 ram formation) l Stuntz conglomerate (as member Byram formation (as marl >) of Knife Lake slate J) Hennessey Bayou member (of fStuntz Island agglomerate 1 Bucatunna marl and clay) 2 Temperance River group 1 Mint Spring marl member (of Temperance River member * (of Marianna limestone) 2 Keweenawan series) tThomson slate l Vicksburg group l or formation fTower group 1 Oligocene, lower Townline Lake granodiorite 2 Forest Hill sand l Vermilion granite 1 fMadison sand * t Vermilion group, schists, series * Red Bluff clay l fVermilion Lake iron-bearing Eocene series l fChickasaw formation or group * Virginia slate 1 Eocene, upper Warman quartz monzonite 2 Jackson formation 1 or group Wauswaugoning quartzite 1 Moodys Branch marl 1 or forma­ West Gull jasper f acies (of tion Ogishke conglomerate) 2 Yazoo clay (as member of Jack­ t White Iron granite 1 son formation J) Zeta Lake granite porphyry Eocene, middle facies (of Ogishke conglomer­ Archusa shale member (of Cook ate) 2 Mountain formation) 2 Mississippi fBasic claystone 1 Recent (?) Basic City shale member (of Tal- Vicksburg fossiliferous loam 1 lahatta formation) 2 Pleistocene fDecatur sand 1 Biloxi sand * {Enterprise green marl 1 Natchez formation ' Gordon Creek shale member (of Pliocene Cook Mountain formation) 2 Graham Ferry formation 2 f Grenada formation l Miocene Holly Springs sand 1 member (of fDavion rock 1 Tallahatta formation) Fort Adams member (of Pasca- fKosciusko sandstone member (of goula clay); (as Fort Adams or Lisbon formation) 1 Ellisville phase 1 ; see also G. F. fMeridian formation * Brown, 1943, Mississippi Geol. Meridian sand member (of Talla­ Survey Bull. 56, p. 47-48) hatta formation)8 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 491

United States Continued United States Continued Mississippi Continued M ississippi Continued Eocene, middle Continued Upper Devonian Neshoba sand member (of Talla- Whetstone Branch shale l hatta formation) 2 Lower Devonian Potterchitto sand member (of Island Hill formation r Cook Mountain formation) 2 Missouri Shipps Creek shale member (of Pleistocene Wautubbee formation) 2 Bagnell till i Shongalo greensand 1 Pleistocene (?) t Wautubbee marl 1 Asherville alluvium 2 Winona sand (as member of Lis­ Tertiary bon formation l) Benton sand 1 Zilpha clay 2 Commerce sandstone 1 Eocene, lower Crowleyan series l fAckerman formation 1 Idalia clay 1 Fearn Springs sand member (of Piketon gravel l ) 2 Poinsettan series l fFlatwoods clay 1 Pliocene Noxubee sand 2 Winoka gravel l Paleocene or Eocene Miocene (f) fBetheden formation 2 Grover gravel 2 Paleocene fChalybeate limestone member Eocene (of ) Bloomfield sand l Tippah sand lentil (of Porters Upper Cretaceous Creek clay) 1 Egypt sand l Cretaceous, Tertiary, and Pleistocene Zadoc member (of McNairy t Lafayette formation 1 formation) 2 Pennsylvanian Upper Cretaceous fAtchinson shale i t Coulters Ferry sands 1 Baden sandstone l Houston marl l fBull ledge l Mooreville chalk (as tongue of Graydon channel sandstone 1 Selma chalk J) Graydon shales 1 fOktibbeha tongue (of Selma Hardesty shale l chalk) 1 fHolden group * l f Knob Noster group l Prairie Rock limestone l Moberly channel sandstone l Ripley formation l f Mound group l Ripleyan series 1 Rockport shales l Tombigbee sand member (of Saline Creek cave conglomerate l Eutaw formation) 1 Sonora shale 1 Tupelo tongue (of Coffee sand) 1 sandstone r Lower Cretaceous Walker conglomerate and sand­ Dantzler formation 2 (subsur­ stone l face) Warrensburg channel sand­ Little Bear formation or re­ siduum 2 stone 1 . Eureka fire clay l Cripple Deer sandstone member Granby conglomerate l (of Alsobrook formation) 1 Pennsylvanian (Virgil) Forest Grove formation l Amazonia limestone member (of Hargett sandstone l Lawrence shale) l Highland Church sandstone fAndrew shale (in Douglas for­ member (of Forest Grove for­ mation) l mation) 1 City Bluffs shale (in Shawnee Pond limestone l formation) l Southward Spring sandstone l Curzon limestone (in Shawnee member (of Pride Mountain formation) * formation) fForbes limestone (in Shawnee Lower Mississippian formation) 1 Carmack limestone 1 Forest City limestone (in Shaw­ luka formation l nee formation) 1 Devonian and Lower Mississippian Forest City sand rock (in Shaw­ t Yellow Creek beds » nee formation) l 492 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Missouri Continued Missouri Continued Pennsylvanian (Virgil) Continued Pennsylvanian (Des Moines) Con. Heumader shale member (of fClear Creek sandstone (in Oread limestone) 1 Cherokee shale) l Holt shale member (of Topeka fClear Fork group 1 limestone) 1 Dederick shale member 1 (of Langdon shale 3 Cherokee formation) Nodaway limestone (in Shawnee Drywood Formation or coal cycle 3 formation) 1 Excello formation 3 fQuitman limestone 1 Flint Hill sandstone member fSt. Joe limestone (in Shawnee (of Fort Scott formation) 3 formation) 1 fHenrietta formation or group 1 fWaldron sandstone (in Douglas Higginsville cyclothem (includ­ formation) 1 ing Higginsville limestone)2 Pennsylvanian (Missouri) Houx cyclothem (including Houx Belton sandstone member (of limestone)3 Chanute formation) 2 Lagonda sandstone member (of Bethany Falls limestone 1 Cherokee shale) 1 Cement City limestone bed (in fLexington group l Chanute shale member of Loutre formation 3 Kansas City formation) 1 Macon City shale 1 Parley limestone bed (in Lans- Miller fire clay 1 ing ? formation) 1 Myrick Station cyclothem (in­ latan limestone !; fmember (ol cluding Myrick Station lime­ Douglas formation) l stone) 2 Kansas City formation 1; group Republic chert 1 in Kansas Rich Hill limestone member fKansas City limestone 1 (of Cherokee shale) 1 fKansas City oolite 1 Robinson Branch formation or Knobtown sand l coal cycle 2 Liberty Memorial shale member Summit limestone (in Cherokee (of Chanute formation) 2 shale) 1 Missouri series (as group J) Tebo formation 2 fParkville limestone (in Kansas Thomas Hill fire clay 1 City formation) 1 Thomas Hill shale 1 fParkville shale 1 Tina cyclothem (including Tina Plaits burg limestone 1; fmember limestone) 2 (of Lansing formation) 1 fWarrensburg group 1 Raytown limestone bed (in Kan­ Worland limestone 1 sas City formation) 1 ; lime­ stone in Kansas fSte. Genevieve group Sniabar limestone 1 fSeneca chert 1 Sugar Creek shale (in Bethany Falls limestone) 1 Aux Vases sandstone 1 Swppe limestone l or formation 1 Carterville formation 1 Union Station shale member (of Carthage limestone 1 Chanute formation) 2 fGabouri limestone l Weston limestone 1 fGenevieve group 1 Weston shale l; fmember (of Meramec series (as group J) Douglas formation) 1 Ste. Genevieve limestone 1 Pennsylvanian (Des Moines) Ste. Genevieve marble 1 Amoret limestone member (of Ste. Genevieve sandstone 1 Altamont formation) 2 SSt. Louis group 1 Ardmore limestone member (of St. Louis limestone 1 Lower Mississippian Cherokee shale) 1 Bushberg sandstone member (of Bevier cyclothem or formation Sulphur Springs formation) 1 (including Bevier clay) 2 f Chouteau group 1 Bevier fire clay 1 1 Blackjack Creek cyclothem (in­ Compton limestone 1 cluding Blackjack Creek lime­ Easley group 2 stone) 2 Fern Glen limestone 1 Blackwater Creek shale member Glen Park limestone member (of Fort Scott formation) 2 (of Sulphur Springs forma­ t Cheltenham fire clay 1 (formation) tion) ; formation 1 in Illinois INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 493

United States Continued United States Continued Missouri Continued Missouri Continued Lower Mississippian Continued Middle Ordovician Grand Falls chert member (of Auburn chert 1 Boone limestone) * Beckett limestone or formation 2 Hannibal shale * Bloomsdale formation 2 Louisiana limestone 1 fBryant limestone 1 Northview shale 1 Charrette limestone l Osage series (as group l) fCape Girardeau marble l tOzark group 1 Hager limestone or formation a Pierson limestone l limestone member (of Reeds Spring limestone * mem­ Macy formation) 2 ber (of Boone formation) l Saverton shale 1 1 Sedalia limestone 1 Macy limestone or formation 2 Sulphur Springs formation 1 McCune limestone 1 Devonian or Mississippian McPherson marble 1 Fabius group 2 1 Devonian Zell limestone member (of Macy Ashland limestone 2 formation) 2 Auxvasse Creek sandstone mem­ Lower Ordovician ber (of Callaway limestone) 1 Blackjack Knob member (of Fortune formation 2 Theodosia formation) 2 Kings limestone 1 Bolin sandstone member (of Webster group l Roubidoux formation) l Devonian(f) Bolivar sandstone 1 shale l fCole Camp sandstone (in Van fPhelps sandstone 1 Buren formation) l Upper Devonian or Mississippian Crystal City sandstone l Grassy Creek shale 1 Dutchtown formation 2 Upper Devonian fFinley limestone l fCraghead Creek shale 1 fFolley limestone 1 Snyder Creek shale 1 Gainesville sandstone (in Black­ Middle Devonian jack Knob member of Theodo­ Beauvais sandstone 1 sia formation)2 Callaway limestone 1 Gasconade dolomite l Cooper limestone 1 Geiser Quarry member (of Dutch- Mineola limestone 1 town formation)2 St. Laurent limestone 1 Gunter sandstone member (of Wittenberg shale 1 Van Buren formation) 1 Lower Devonian Hercules Tower sandstone (in limestone 1 Lutie member of Theodosia Little Saline limestone 1 formation) 2 Silurian and Devonian Jefferson City dolomite l fPerry limestone 1 tJefferson City group l Middle Silurian King limestone 1 Bainbridge limestone 1 Lutie member (of Theodosia Moccasin Springs formation 2 formation) 2 Lower Silurian Marsh field sandstone 1 Bowling Green limestone mem­ Minnith zone (in Powell lime­ ber (of Edgewood limestone) 1 stone) l Edgewood limestone 1 fMoreau sandstone 1 Girardeau limestone 1 fOsage limestone 1 Hopkintonian series 2 t Pacific sandstone 1 Noix oolite member (of Edge- Rich Fountain formation 2 wood limestone) 1 Rockaway conglomerate bed (in Watson limestone 1 Lutie member of Theodosia Ordovician formation) 2 Rock Levee formation 2 fRock Fort sandstone 1 Upper Ordovician and Silurian Roubidoux formation l or dolo­ Buffalo shale l mite Upper Ordovician Sac limestone l f Cape Girardeau sandstone 1 fSt. Elizabeth formation J Decaturville chert l fSt. Peter group 1 Spencer chert 1 fSt. Thomas sandstone 1 494 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Missouri Continued Montana Continued Lower Ordivician Continued Tertiary Continued School Mine ledge beds (in Rich Carpenter Creek granite por­ Fountain formation) 2 phyry 1 Theodosia formation 2 Drummond 1 (clays) t White River limestone 1 Silver Dyke breccia 1 fWinfield dolomite 1 Tertiary, upper, or Pleistocene Van Buren formation l Clark Canyon lavas 2 Cambrian Tertiary, upper (?) Delassus formation 2 Belmont porphyry 1 Tom Sauk limestone member (of Drumlummon porphyry * Bonneterre formation) 2 Probably upper Tertiary Upper Cambrian and Lower Ordo- Stanford conglomerate 1 vician (?) Tertiary, lower tLesueur dolomite 1 Snow Creek quartz porphyry 1 fOzark series 1 Tertiary (Post-Eocene?) fPotosi group 1 Linley conglomerate 1 Upper Cambrian and Lower Ordo- Pliocene(?) vician(?) Fort Ellis beds» fEangua limestone 1 Miocene or Pliocene Upper Cambrian Castle granite 1 Bonneterre dolomite 1 fModoc porphyry 1 1 Robinson diorite 1 fDecaturville limestone 1 Miocene, upper, or Pliocene Derby dolomite 1 Flaxville formation (as gravel) 1 Doe Run dolomite 1 Madison Valley beds 1 Elvins group 1 Miocene, middle Eminence dolomite 1 Deep River beds 1 fFredericktown dolomite 1 fSmith River lake beds 1 Iron Mountain conglomerate * (?) Miocene, middle Laclede sandstone 1 fFlint Creek beds l Lamotte sandstone 1 Miocene, lower fOzark marble 1 Blacktail Deer Creek basalts 2 Pilot Knob conglomerate 1 Fort Logan beds 1 1 Oligocene fPotosi slates and conglomerate 1 Pipestone beds l Proctor dolomite 1 Oligocene(?) fSt. Francois limestone 1 Muddy Creek beds 2 fSt. Joseph limestone 1 Oligocene, upper, to Miocene, lower Medicine Lodge voleanics 2 Precambrian (?) Oligocene, upper Francoisian series 1 fBlacktail Deer Creek beds 1 Graniteville granite 2 Oligocene, middle Iron Mountain porphyry 1 Cook Ranch formation 1 Ironton granite 2 Cook Ranch rhyolites 2 Ironton slate 1 Cook Ranch voleanics 2 Knob Lick granite 1 Muddy Creek voleanics 2 Pilot Knob formation 1 fToston beds 1 Pilot Knob iron formation 1 Oligocene, lower Skrainka diabase 1 fPipestone Creek beds ' Silver Mine granite 2 fThompson Creek beds 1 Age(?) Eocene Kings Branch limestone 1 Beaverhead granite 2 Montana Black Butte till 2 Recent fBluebird aplite 1 Galata ash 2 tBull Mountain series l Pleistocene Crazy Mountain granite ' Loco diorite 1 Great Falls lake sands 2 Sagean series 1 fKennedy gravels 1 Snowcrest granite 2 beds 1 Sphinx conglomerate 1 Pleistocene(?) Eocene(?) Wiota gravels 2 Butte quartz monzonite 1 Tertiary Highwood syenite 1 Bozeman group (as lake beds) l Reese formation 1 INDEX TO THE GEOLOGIC NAMES OP NORTH AMERICA 495

United States Continued United States Continued Montana Continued Montana Continued Eocene, upper Upper Cretaceous Continued Sage Creek basalts 2 Soap Creek bentonite bed (in Eocene, upper (?) Frontier formation) 2 Sage Creek formation 1 Stoneville Flats limestone (in Paleocene Belle Fourche shale) 2 Bear [formation] 2 Telegraph Creek formation or Lebo shale member and andesitic member (of Cody shale) member (of Fort Union for­ Tombstone sandstone 1 mation) l Two Medicine formation l Maudlow conglomerate lentil (in Virgelle sandstone or sandstone Livingston formation) 2 member (of Eagle sandstone) 1 Melville formation 2 Warm Creek shale 1 TuIIock member (of Fort Union Whitlash sands 1 formation); (as formation J) Lower and Upper Cretaceous Willow Creek formation l Benton shale 1 or formation Post-Cretaceous Cat Creek sands * Barker porphyry 1 Lower and Upper Cretaceous and Wolf porphyry 1 Post~Cretaceous(?) fYellowstone formation * Pinto diorite 1 Lower Cretaceous Cretaceous(?) fCascade formation 1 Neihart porphyry l Cosmos sand 1 (subsurface) Upper Cretaceous and Paleocene Cutbank sand l fCrazy Mountain beds 1 Darling sand 1 (subsurface) Douglass 1 (shales) Livingston formation 1 Farland 1 (limestone) Upper Cretaceous Gird * (shales) Adel Mountain volcanics 2 f Great Falls coal series or group l Bearpaw shale 1 Lupton sand 1 (subsurface) Beaverhead formation 2 Moulton sand 1 (subsurface) Big Elk sandstone member (of Olson 1 (limestone) Colorado shale) 1 Pryor conglomerate member (of Birdhead sandstone member (of Cloverly formation) 1 Cloverly formation); (as mem­ Stewart sand 1 (subsurface) ber of Thermopolis shale J) Sunburst sand 1 (subsurface) (as sandy Warm 1 (formation) member of Colorado shale *) Wyman 1 (formation) Bowdoin sand 1 (subsurface) Lower (?) Cretaceous Bull Creek sandy limestone (in American Fork formation l Greenhorn formation) 2 Jurassic and Cretaceous Claggett formation, 1 shale, or fCrow Ridge series 1 shale member (of Cody shale) Jurassic Colgate member (of Fox Hills Picard shale member (of Nesson sandstone) 1 formation) 2 (subsurface) Cow Island beds 1 Vernal 1 (shale) Eagle sandstone 1 Upper Jurassic fFish Creek beds 1 Emrick sand 1 (subsurface) Fly Creek limestone 1 Rierdon formation 2 Groat sandstone bed (in Pierre Swift formation 2 shale) 1 Middle and Upper Jurassic Hell Creek formation 1 Ellis formation 1 or group Horsethief sandstone 1 Middle Jurassic fJudithian series 1 Bowes member (of Piper forma­ 1 tion) 2 (subsurface and surface) Lennep sandstone 1 Firemoon limestone member (of Martin sandy zone 1 (subsurface) Piper formation) 2 (subsurface Montana group 1 or formation and surface) t Montana series 1 Piper formation 2 Montanan series 1 Sawtooth formation 2 Mosby sandstone member (of Tampico shale member (of Piper Colorado shale); (as member of formation) 2 (subsurface and Warm Creek shale *) surface) Sage Hen limestone member (of Permian and Triassic Colorado shale) 1 Bowler formation * 496 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Montana Continued Montana Continued Carboniferous Upper Devonian Continued Melrose l (quartzite) Potlatch anhydrite1 or member Missoula l (limestone) (of Three forks formation) Pennsylvanian (?) (subsurface) Tyler sandstone member (of Union shale l Quadrant formation) 1 Middle and Upper Devonian Mississippian or Pennsylvanian t Monarch formation 1 Alaska Bench limestone ! Middle Devonian Mississippian to Pennsylvanian Coopers Lake limestone member 1 Absaroka sequence 2 (of Jefferson limestone) Mississippian and (or) Pennsyl­ Glenn Creek shale member (of vanian Jefferson limestone) 1 Big Snowy group 1 or formation Lone Butte limestone member 1 (of Jefferson limestone) Charles formation 2 (subsurface) Spotted Bear limestone member 1 Dean Lake Chert member 1 (of (of Jefferson limestone) Madison limestone) White Ridge limestone member ' Hannan limestone 2 (of Jefferson limestone) Monitor Mountain limestone mem­ Post-Cambrian ber 1 (of Madison limestone) Bandbox Mountain type J (anal- Rooney chert member ' (of Mad­ cite basalt) ison limestone) Barker syenite 1 Saypo limestone member 1 (of Big Baldy Mountain type 1 (anal- Madison limestone) cite basalt) Silvertip conglomerate member 1 Eureka Divide type 1 (analcite (of Madison limestone) basalt) Van Duzen sand 1 (subsurface) Steamboat Mountain type (of Upper Mississippian diorite porphyry) 1 Heath formation 1 Wolf Butte type (of granite Eibbey sandstone (as member of porphyry) 1 Quadrant formation 1 Yogo Peak type (of granite Otter formation or shale (as porphyry) 1 member of Quadrant forma­ Cambrian tion i) Barkerian series 1 Sun River dolomite 2 Tilden formation 1 Yakinikak limestone 1 Upper Cambrian and Middle Devo­ Lower Mississippian nian fCastle limestone member (of Keene limestone 1 Madison limestone) 1 Upper Cambrian Little Chief Canyon member (of Cemetery limestone 1 Lodgepole limestone) 2 Devils Glen dolomite 1 Lodgepole limestone 1 Dry Creek shale 1 Madison limestone,1 formation, Elkhorn shale or hornstone l or group Gallatin limestone 1 or formation Mission Canyon limestone 1 Grove Creek formation 2 Paine shale member (of Madison Hasmark formation 1 limestone) 1 Maurice formation 2 Trident J (formation) Pilgrim limestone 1 or dolomite Woodhurst limestone member Red Lion formation 1 (of Madison limestone) 1 { Republic reef Devonian Sage pebble-conglomerate member Ermont formation l (of Snowy Range formation) 2 Upper Devonian and Mississip­ Snowy Range formation 2 pian Yogo limestone 1 Sappington sandstone member Middle and Upper Cambrian (of Three Forks shale) 2 fBarker formation 1 Threeforks shale1, limestone1, Gordon Mountain limestone ! or formation Middle or Upper Cambrian Upper Devonian Switchback shale (as limestone l) Jefferson limestone1, dolomite1, Middle Cambrian or formation; group in subsur­ Alpreston quartzite * face Dearborn limestone 1 Maywood formation l Flathead quartzite 1 or sandstone INDEX TO THE GEOLOGIC NAMES OP NORTH AMERICA 497

United States Continued United States Continued Montana Continued Montana Continued Middle Cambrian Continued Precambrian Continued tFlathead formation or shales 1 Eintla argillite l Gordon shale 1 Libby formation 2 Hobo Gulch formation 1 f Lolo series l Meagher limestone 1 McNamara formation 1 or argil­ Pagoda oolite 1 lite Park shale 1 Madisonic period 1 Pentagon shale 1 Marsh shale 1 Silver Hill formation l formation l or argil­ Starmount limestone 1 lite Steamboat limestone 1 Missoula group 1 Wolsey shale 1 Neihart quartzite l Middle(f) Cambrian Newland limestone 1 or formation Damnation limestone 1 North Boulder group 2 or forma­ Nannie Basin limestone l tion Precambrian Piegan group 2 Altyn limestone 1 Pony series 1 Appekunny argillite 1 or forma­ Prickly Pear member (of Spokane tion formation) 2 Appistoki member (of Appe­ Ravalli group 1 or argillite kunny argillite) 1 Ravallian series 1 Ahorn quartzite 2 Red Gap member (of Grinnell Creek phase (of Cherry argillite) 1 Creek series) 2 Rising Bull member (of Grinnell Belt series 1 argillite) 1 Bitterroot period l Rising Wolf member (of Ap­ Blackfoot formation 1 pekunny argillite) 1 Blackfootian series 1 Rogersian series 1 Black Point dolomite member (of Ruby limestone and gneiss * Cherry Creek series) 2 Scenic Point member (of Ap­ Blacktail granite gneiss 2 pekunny formation) 2 Boulder Pass formation 1 Sheep Mountain quartzite 1 Camp Creek group l Shepard formation 1 Cayuse limestone 2 Singleshot member (of Appe­ Chamberlain shale 1 kunny argillite) ' Cherric period 1 Siyeh limestone 1 Cherry Creek group 1 Spokane shale 1 or formation 1 Cooke granite 1 Stillwater complex l Dillon granite gneiss 2 Turnley hornstone or shale 1 Donaher sandstones 1 Nebraska Donald quartzites 1 Pleistocene and Recent tEast Gallatin group 1 Bignell loess 2 Empire shale 1 f Plains series l Gallatinian series l Sand Hills formation l Garnet Range formation 1 or Pleistocene quartzite fPlatte series 1 Gateway formation 1 fSheridan beds l Goathaunt member (of Siyeh Pleistocene (Wisconsin) limestone) 1 Brady soil 2 Goose Creek granite l Todd Valley sand (as formation J) Granite Park member (of Siyeh Pleistocene (Illinoiari) limestone) 1 Crete formation 2 Greenhorn Mountain quartzite 2 Pleistocene (Yarmouth) Greyson shale l Sappa formation 2 Grinnel argillite 1 f Upland formation l Hefty formation l Pleistocene (Kansan) Helena limestone 1 Grand Island formation 1 Helenan series l Red Cloud sand and gravel 2 Hellgate quartzite member (of Pleistocene (Aftonian) Miller Peak argillite); (as Fuller ton formation 1 formation) 1 Pleistocene (Nebraskan) Hoadley formation 2 David City formation 1 Hole-in-the-Wall member l (of Holdrege formation l Boulder Pass formation) Nebraskan drift 1 498 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued N ebraska C ontinued Nebraska Continued Pleistocene, lower Cretaceous Broadwater formation 2 fOmadi sandstone 2 Lisco member (of Broadwater Upper Cretaceous or Eocene formation) 2 Platte River formation 1 Tertiary, middle Upper Cretaceous Loupian 1 (series) Ainsworth formation 1 Whitian series 1 Dakota sandstone 1, formation, Pliocene group or quartzite Ash Hollow formation 2 Dakotan series 1 Feldt Ranch beds (in Ash Hollow fDixons group l formation) 2 Niobrara formation l, chalk, or Kimball formation 2 shale; member (of Mancos Minnechaduza beds (in Ash shale in New Mexico; of Cody Hollow formation) 2 shale in Montana) Ogallala formation 1 Ponca sandstone 1 Seward formation 2 Permian Sidney gravel 2 Aspinwall limestone member (of Snake River stage 1 Onaga shale); (as limestone or Pliocene(f) shale in Admire shale *) Devils Gulch beds 1 Barneston limestone (as forma­ Valentine beds 1 tion ») Pliocene, lower Bennett shale 1 member (of Red f Republican River formation l Eagle limestone) Miocene, Pliocene, and Pleistocene(?) Burr limestone member l (of fLoup Fork beds or group * Grenola limestone) Miocene, Pliocene, and later(?) Eiss limestone 1 member (of fNiobrara group 1 Bader limestone) Miocene to Pliocene Falls City limestone l Niobrara River channel sands Five Point limestone member (in Valentine formation) 2 (of Janesville shale); (as lime­ Miocene stone in Admire shale *) Arikaree group (as sandstone J); Fourmile limestone (in Wreford formation in Colorado and limestone) 1 Wyoming; formation or sand­ Glenrock limestone l member stone in South Dakota (of Red Eagle limestone) Box Butte member (of Sheep Hamlin shale 1 member (of Janes­ Creek formation) 2 ville shale) Gering sandstone (as formation1) Hawxby shale 1 member (of Hemingford group 2 Onaga shale) Marsland formation 2 Holmesville shale l member (of tN ebraska beds 1 Doyle shale) Sand Canyon member (of Sheep Houchen Creek limestone 1 bed Creek formation) 2 (in Hamlin member of Janes­ fScotts Bluff formation 1 ville shale) Sheep Creek formation (as beds ]) Howe limestone 1 member (of Spottedtail member (of Sheep Red Eagle limestone) Creek formation) 2 Hughes Creek shale 1 member Miocene, upper, or Pliocene, lower (of Foraker limestone) Burge sands member (of Ogallala Indian Cave channel sandstone formation) 1 bed (in Towle member of tFort Niobrara formation 1 Onaga shale); (as sandstone ') Snake Creek beds 1 Johnson shale 1 Miocene, lower Einney limestone 1 member (of Harrison sandstone (as beds !) Matfield shale) Monroe Creek beds 1 Oligocene Erider limestone l member (of Orella member (of Brule forma­ Nolans limestone) tion) 2 Long Creek limestone l member Whitney member (of Brule for­ (of Foraker limestone) mation) 2 Middleburg limestone 1 member Oligocene, upper, to Miocene (of Bader limestone) Bayard paleosol complex 2 Oaks shale 1 bed (in Hamlin Oligocene, lower member of Janesville shale) 1 Odell shale 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 499

United States Continued United States Continued Nebraska Continued Nebraska Continued Permian Continued Pennsylvanian (Virgil) Continued Paddock shale 1 member (of Otoe shale member (of Friedrich Nolans limestone) formation) 2 Roca shale l Palmyra limestone member (of Salem Point shale member 1 (of Friedrich formation) 2 Grenola limestone) Pierson Point shale 1 Speiser shale 1 Plattford shale (in Scranton Stine shale 1 bed (in Hamlin shale) 1 shale member of Janesville Plattsmouth limestone 1 member (of Oread limestone) West Branch shale l member Pony Creek shale 1 member (of (of Janesville shale) Wood Siding formation) Wymore shale 1 member (of Queen Hill shale (in Lecompton Matfield shale) limestone) 1 Pennsylvanian Rakes Creek shale (in Tecumseh Ashland limestone 1 shale) 1 Cedar Creek limestone 1 Richardson subgroup 1 Cullom limestone 1 Rock Bluff limestone (in Deer Fargo limestone 1 Creek limestone) 1 Lehmer limestone member (in Rulo limestone 1 member (of Admire shale) 1 Scranton shale) Louisville limestone 1 Sheldon limestone (in Calhoun Meadow limestone 1 shale) 1 Miles limestone member J (of Shoemaker limestone 1 Falls City formation) Snyderville shale 1 member (of Nehawka limestone 1 Oread limestone) Oreapolis limestone 1 South Fork limestone 1 Preston limestone 1 Sturm, limestone (in Lawrence Union limestone 1 shale) 1 Pennsylvanian (Virgil) Table Creek shale l Avpca limestone (in Lecompton Taylor Branch limestone 1 limestone) 1 Turner Creek shale (in Topeka Beil limestone (in Lecompton limestone) 1 limestone) l Weeping Water limestone (in Brownville limestone l member Oread limestone) 1 (of Wood Siding formation) Winnebago shale * Cass limestone 1 Wood Siding formation 2 Church limestone 1 member (of Pennsylvanian (Missouri) Howard limestone) Dyson Hollow limestone zone or Ervine Creek limestone (in Deer member (of Stoner member of Creek limestone) 1 Stanton formation) 2 Heebner shale 1 member (of Kiewitz shale (in Stanton lime­ Oread limestone) stone) J Jones Point shale (in Calhoun P. W. A. Quarry limestone mem­ shale) l ber (of Drum formation) 2 Kenosha shale (in Tecumseh Richfield Quarry shale member shale) 1 (of Drum formation) 2 King Hill shale (in Lecompton shale 1 member (of limestone) 1 Stanton limestone) Larsh shale (in Deer Creek lime­ Sarpy formation 2 stone) 1 South Bend limestone l member Little Pawnee shale member (of (of Stanton limestone) Cass formation) 2 Stoner limestone 1 member (of Minersville shale member (of Stanton limestone) Friedrich formation) 2 Mississippian Morton shale 2 Boice shale 2 (subsurface) Nebraska City limestone 1 mem­ Nevada ber (of Wood Siding forma­ Quaternary tion) American Flat basalt 2 Nemaha formation, member, or Carsonian series 1 subgroup 1 Pleistocene (see also Pliocene, upper, Ost limestone (in Tecumseh or Pleistocene) shale) 1 beds 1

504835 58 500 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Nevada C ontinued Nevada Continued Tertiary (see also Precambrian or Miocene(?) Tertiary) American Ravine andesite por­ Chipsa andesite 1 phyry 2 Elko Prince rhyolite 1 Davidson granodiorite 2 Extension breccia 1 Miocene, upper, or later Grapevine conglomerates 1 Maris rhyolite 1 June Bell rhyolite * Miocene or Pliocene, lower Eendall tuffs 1 Kate Peak formation 2 Kyle sandstone l Miocene, upper, or Pliocene, lower Mammoth andesite 1 Currant tuff 2 Meda rhyolite 1 Miocene, upper, and Pliocene, lower t Midway andesite 1 Bald Mountain lake beds mem­ Milltown andesite l ber (of Esmeralda formation) > Mizpah trachyte 1 Diamond King member (of Es­ f Montana breccia 1 meralda formation) 1 Morena rhyolite 1 Esmeralda formation * Sandgrass andesite 1 Hedwig breccia member (of Sandstorm rhyolite 1 Esmeralda formation) 1 Tonopah formation 1 Round Rock member (of Es­ Victor andesite 1 meralda formation) l Vindicator rhyolite 1 Miocene, upper West End rhyolite 1 fCedar Mountain beds * Wonder rhyolite 1 Fraction breccia 1 Tertiary(?) Mira basalt 1 Modoc lavas 1 tSiebert formation 1 Overton fanglomerate 1 Siebert tuff 1 Miocene, upper (?) Tertiary (?) (pre-Pliocene) Brougher dacite 1 Black Canyon group 2 Divide andesite 1 Tertiary, upper Espina breccia l Mesa basalt 1 Heller dacite 1 Pueblo Mountain series 1 Probably pre-upper Miocene Tertiary, lower Gil more Gulch formation 1 Amargosan series 1 Miocene, lower Pliocene Pueblo Range series l Gilbert andesite 2 Oligocene(?) Mount Kate volcanics 2 Alta formation 2 Railroad Ridge basalt 1 Hartford Hill rhyolite tuff 2 Thousand Creek beds 1 Sutro member (of Alta forma­ Truckee formation l tion) 2 Pliocene(?) Eocene Hospital porphyry 2 Elko shale or group 1 Malpais basalt 1 Bocene(?) Muddy Creek formation ! Horse Spring formation 1 f Muddy Valley beds l Upper Cretaceous Pozo formation 2 Baseline sandstone 2 Rabbit Spring formation » Willow Tank formation 2 Spearhead rhyolite 1 Upper Cretaceous (?) Toyabe quartz latite 2 Thumb formation 2 Probably Pliocene Jurassic or Cretaceous Panaca formation 1 Rocky Canyon granite * Jurassic Pliocene or Pleistocene Oreana shale 1 Knickerbocker andesite 2 Scossa slates l Pliocene, upper, and Pliocene, lower Jurassic(?) Lousetown formation 2 Aztec sandstone 1 Pliocene, lower (?) Lower Jurassic Oddie rhyolite 1 Dunlap formation 1 Miocene and Pliocene(?) Lovelockian series 1 Humboldt formation 1 Muttleberry limestone * Miocene Sunrise formation l Davis Creek beds 1 Triassic Forman volcanics 2 Red Rock limestone 2 Virgin Valley beds * Rochester rhyolite 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 501

United States Continued United States Continued Nevada Continued Nevada Continued Upper Triassic Mississippian and Pennsylvanian Cane Spring formation 2 Tonka formation 2 Dun Glen formation 2 Mississippian (see also Devonian Gabbs formation 1 Grass Valley formation 2 Indian Springs member (of Bird Luning formation 1 Spring formation) 1 Osobb formation 2 fRobinson shale 1 Raspberry formation 2 Rogers Spring limestone ' Winemucca formation 3 San Simon limestone * Upper(f) Triassic Mississippian(f) fStaran series * Inskip formation 2 Middle and Upper Triassic Uppjer Mississippian to Permian Natchez Pass formation 2 Bird Spring formation 1 group 1 Upper Mississippian and Lower Middle Triassic Pennsylvanian Augusta Mountain formation 2 Bailey Spring limestone l Favret formation 2 Ely limestone l Grantsville formation 2 Upper Mississippian fKoipatoan series J Arrowhead limestone member (of Nenzel rhyolite breccia 2 Monte Cristo limestone) 1 Panther Canyon formation 2 Bluepoint limestone l Prida formation 2 Chainman shale l Simon quartz keratophyre 1 formation (as Middle(?) Triassic quartzite *) Excelsior formation 1 Illipah formation 2 Limerick keratophyre J Scotty Wash quartzite 1 Lower and Middle (?) Triassic Yellowpine limestone member (of China Mountain formation 2 Monte Cristo limestone) ' Lower Triassic Lower and Upper Mississippian Candelaria formation 1 Monte Cristo limestone ' or Dixie Valley formation 2 dolomite Tobin formation 2 Peers Spring formation 1 Lower Triassic and Permian(f) fWhite Pine shale 1 Weaver rhyolite 1 Lower Mississippian Permian and Triassic Anchor limestone member (of Koipato formation 1 or group Monte Cristo limestone) 1 or Permian member (of Monte Cristo Arcturus limestone 1 dolomite) Diablo formation 2 Bristol Pass limestone l Edna Mountain formation 2 Bullion dolomite member (of Rochester trachyte 1 Monte Cristo limestone) * or Tallman fanglomerate 2 member (of Monte Cristo dolomite) Darrough felsite 2 Dawn limestone member (of Pablo formation 2 Monte Cristo limestone) * or Car&om/erows member (of Monte Cristo Diamondian series * dolomite) Pennsylvanian and Permian Joana limestone l Callville limestone 1 Mississippian or older Havallah formation 2 Leach formation 2 Pumpernickel formation 2 Rib Hill formation 2 Devonian and Mississippian fRuth limestone * Pilot shale l Upper Pennsylvanian and Permian Devonian limestone 2 Lamoureux or Lamoureaux shale 1 Strathearn formation 2 Pinean series 1 Middle Pennsylvanian Woodpecker limestone 1 2 Upper Devonian Highway limestone 2 Atrypa limestone * Tomera formation 2 Combs limestone 1 Lower Pennsylvanian West Range limestone 1 Moleen formation 2 Middle and Upper Devonian Crystal Pass limestone member Whistler Mountain alaskite 2 (of Sultan limestone) 1 502 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Nevada Continued Nevada Continued Middle and Upper Devonian Con. Cambrian Devils Gate limestone 2 Gold Hill formation l Ironside dolomite member (of Morning Glory limestone mem­ Sultan limestone) J ber (of Gold Hill formation) 1 fNevadan series J Pine Nut limestone member (of Sultan limestone ' Gold Hill formation)» Valentine limestone or dolomite fProspectan series 1 member (of Sultan limestone) 1 Swarbrick formation 1 Middle Devonian Tybo shale l Silverhorn dolomite l White Caps limestone member Slaven chert 2 (of Gold Hill formation) 1 Middle Devonian and possibly older Upper Cambrian to Devonian(?) Muddy Peak limestone 1 Goodsprings dolomite 1 Lower and Middle Devonian Probably Upper Cambrian Nevada limestone 1 or formation Hales limestone 1 Lower Devonian Upper Cambrian Cooper Peak dolomite 2 Dunderberg shale 1 Silurian Dunderbergian series 1 dolomite (as tHambergian series l limestone *) Hamburg limestone J or dolo­ Roberts Mountains formation 2 mite Upper Silurian fHamburg shale * jLone limestone 1 Harmony formation 2 Middle Silurian Mendha limestone 1 Timpahutean series l Middle or Upper Cambrian Ordovician Preble formation 2 Pahranagat limestone * Middle and Upper Cambrian Pinyon series l Highland Peak limestone * Ordovician(f) Middle(?) and Upper Cambrian Coaldale chert 2 Emigrant formation 1 Mayflower schist l Middle Cambrian Sonoma Range formation 2 Burnt Canyon limestone 2 Zanzibar limestone 1 Burrows dolomite 2 Upper Ordovician Burrows shale 2 Ely Springs dolomite 1 Chisholm shale ' Hanson Creek formation 2 Comet shale 2 Condor member (of Swasey lime­ Middle Ordovician stone) 2 Eureka quartzite 1 Eldoradan series 1 Lower Upper Ordovician Eldorado dolomite (as limestone J) Valmy formation 2 Geddes limestone 2 Lower, Middle, and Upper(f) Ord­ Lyndon limestone 1 ovician Peasley limestone 2 Toquima formation l fProspect Mountain limestone 1 Lower and Middle Ordovician Rubyan series 1 Pogonip group (as limestone J) fSecretan series * Vinini formation 2 Secret Canyon shale 1 Lower and Middle (?) Ordovician Middle(?) Cambrian Palmetto formation * Scott Canyon formation 2 Lower Ordovician Lower and Middle Cambrian Cherry shale x Combined Metals member (of Comus formation 2 Pioche shale); (as bed J) Egan limestone 1 Pioche shale * Goodwin limestone (as forma­ Lower Cambrian tion l) Forlorn Hope shale 2 Goodwinian series * Johnnie formation 1 Lehman formation 2 Miller Mountain formation 2 fPogonipan series l Prospect Mountain quartzite 1 Schell shale » Silver Peak group l Steptoean series J Stirling quartzite 1 Tank Hill limestone l Wood Canyon formation l Willow limestone l Lower Cambrian(f) Yellow Hill limestone l Osgood Mountain quartzite 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 503

United States Continued United States Continued Nevada Continued New Hampshire Continued Precambrian or Tertiary Devonian or Carboniferous Con. Boulder Wash group 2 Pond Hill granite 1 Precambrian Priest Hill granite l Clover quartzites J Randolph granite 1 Age(t) Rowes vent-agglomerate * Canon rhyolite 1 Sawyer quartz syenite 1 Elder sandstone 2 Scrag granite J Gold Butte granite 2 Sugar Hill quartz monzonite J New Hampshire Devonian (?) Paleozoic(?) Albany porphyritic nordmarkite J Coos group J Durham quartz diorite * Kearsarge andalusite group 1 Hampton granodiorite * Upper Paleozoic(?) Mount conglomerate * f Berlin gneiss 1 Pequawket breccia J Carboniferous(?) Rochester biotite granite 1 Albany quartz syenite J South Moat flow 1 Garland Peak syenite 2 Upper Devonian Lafayette granite porphyry 1 Smarts Mountain granite 2 Mount Tripyramid complex 2 Upper Devonian(f) Passaconway syenite 2 Baker Pond gneiss 2 Red Hill complex 2 Bethlehem gneiss l Watson Ledge quartz syenite 2 Bickford granite 1 Carboniferous or post-carboniferous Concord granite l Fitzwilliam granite 1 Croydon group 2 Carboniferous to Precambrian(f) Exeter diorite 1 fLake Winnipesaukee gneiss 1 French Pond granite x Pennsylvanian (?) Haverhill granodiorite 2 Gonic formation l Kinsman quartz monzonite (as Rindgemere formation 1 granodiorite l) Mississippian(f) Long Mountain granite 2 Albany porphyritic quartz sye­ Mascoma group 2 nite 1 Meredith granite * Conway granite J New Hampshire plutonic series Moat volcanics 1 (as magma series J) Mount Garfleld porphyritic Norway quartz monzonite 2 quartz syenite 1 Remick tonalite l Mount Lafayette granite por­ Spaulding quartz diorite 2 phyry 1 Tamworth granite 2 Mount Osceola granite 1 Unity group a Pawtuckaway complex 2 Middle or Upper Devonian plutonic-vol- Lebanon granite ' canic series (as magma series J) Middle or Upper Devonian^?) Devonian or Carboniferous Oliverian plutonic series (as Albany granite ' magma series l) Ames monzodiorite 1 Whitefield gneiss 2 Baldface phase J (of Conway Post-Lower Devonian granite) Pine Mountain complex ! Belknap syenite l Lower Devonian Black Cap phase J (of Conway Boott member (of Littleton for­ granite) mation) 2 Chatham granite J Dakin Hill member (of Littleton Chocorua granite J formation) 2 Diana phase J (of Conway gran­ Durgin Brook member (of Little- ite) ton formation) 2 Endicott diorite 1 member (of Little- Franconia breccia l Gilford gabbro J ton formation) 2 Gilmanton monzodiorite J Jenness Pond member (of Little- Lake quartz syenite 1 ton formation) 2 Landaflf granite 1 Littleton formation l Moody Ledge granite 1 May Pond member (of Littleton Moulton diorite l formation) 2 Owls Head granite 1 Pittsfield member (of Littleton Pemigewasset series 1 formation) 2 504 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New Hampsiiire Continued New Hampshire Continued Lower Devonian(?) Age(f) Blueberry Mountain argillite J Gunstock gneiss * Talford schist 1 South Hampton granite * Pre- Devonian (?) New Jersey Parker Hill schist 1 Quaternary (probably Recent) Silurian and Devonian Lalor sands 1 Blueberry Mountain series J Pleistocene SUurian(f) Bridgeton formation l granite gneiss * Cape May formation 1 Intervale clay slate l fFish House beds 1 Lyman formation l Fish House clay * Middle Silurain Glassboro gravel 1 Fitch formation l fJamesburg formation * Fitch Hill arkose » Jerseyan drift l Lower and Middle Silurian Pensauken formation 2 Clough quartzite or formation (as fTrenton gravel ' conglomerate *) Woodmansie phase (of Bridgeton Pre-Silurian formation) * West Bath slate » Pliocene(f) Ordovician to Lower Devonian Beacon Hill gravel 1 New Hampshire sequence 2 conglomerate l Probably Ordovician and Silurian Miocene(?) Calef member (of Eliot forma­ Cohansey sand ' tion) 2 Miocene, upper Gove member (of Berwick forma­ Alloway clay 1 tion) 2 Asbury clay 1 Rye formation 2 Miocene, middle Ordovician Kirkwood formation l Albee formation l Shiloh marl member (of Kirk Piermont member (of Albee wood formation) l formation) 2 Eocene Ordovician(?) fLong Branch sand J Ammpnoosuc volcanics 1 fSquankum marl l Partridge formation (as slate *) {Timber Creek beds l Upper Ordovician Eocene, middle Highlanderoft granodiorite * Shark River marl 1 Highlandcroft plutonic series (as Eocene, lower magma series J) Manasquan marl 1 fLisbon quartzite J Rancocas group or formation ' Lost Nation quartz diorite 2 fSewell formation 1 Paleocene Middle Ordovician(f) Hornerstown marl 1 Hardy Hill quartzite member (of Vincentown sand 1 Orfordville formation) 2 Cretaceous Orfordville formation 2 Sand Hill J (series) Post Pond volcanic member (of Upper Cretaceous Orfordville formation) 2 fAmboy clays 1 Sunday Mountain volcanic mem­ Bay View Avenue sand * ber (of Orfordville formation) 2 fCliffwood clays * Cambrian and Ordovician fColumbus sand ' Lisbon formation 1 Crosswicks clay 1 Probably Cambrian Englishtown sand 1 Swift Water formation 1 Farrington sand member (of Precambrian and Pennsylvanian(f) Raritan formation) 2 fRockingham schist * fHazlet sands * Precambrian (f) Marshalltown formation l fMontalban l (formation) Matawan group or formation 1 Mount Deception granite 1 Merchantville clay J Rye gneiss * group or formation 1 Winnipesaukee quartz diorite (as Mount Laurel sand l gneiss J) Navesink marl 2 Precambrian(?) and later Old Bridge sand member (of White Mountain series 1 Raritan formation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 505

United States Continued United States Continued New Jersey Continued New Jersey Continued Upper Cretaceous Continued Precambrian Continued fRaritan clay 1 fSand Pond gneiss * Raritan formation l Stockholm band 1 Red Bank sand l fVan Nest Gap gneiss 1 Sayreville sand member (of Raritan formation) 2 fNew Vernon trap 1 South Amboy fire clay > New Mexico Tinton sand member (of Red Recent Bank sand) 1 Capulin basalts 2 Trenton clays 1 Carrizozo lava flow 2 Wenonah sand l Gamerco formation 2 Woodbridge fire clay 1 Nakaibito formation 2 Wood bury clay l Tularosa Malpais lava 2 Triassic Quaternary (see also Tertiary or fRocky Hill trap » Quaternary) Upper Triassic Bandelier rhyolite tuff 2 t Arlington traps l Blue Water basalt flow 1 Brunswick shale l or formation Canjilon till 2 Granton trap 1 Canones andesite 2 Lockatong formation l Chico phonolites 2 Manassas sandstone 1 Clay ton basalts 2 Newark group l Gilan series 1 New Germantown trap J Jornadan series * Sand Brook trap 1 Lobato basaltic lavas 2 !Snake Hill trap J McCartys basalt flow l Stockton formation l Mescalero sands * fSourland Mountain trap 1 Palomasan series * Watchung basalt l Puye* gravel 2 Devonian Raton basalts 2 t Green Pond Mountain group J Red Mountain dacites 2 Middle Devonian Sandia clay * Kanouse sandstone l Santa Clara basalt 2 fPequanoc shale 1 Slagle trachytes 2 Silurian Tuerto gravel 2 Decker Ferry shales 1 Turkey Mountain andesite 2 Green Pond conglomerate » University beds 2 fGreen Pond quartzite 1 Vallecito basalt 2 fKittatinny sandstone 1 Pleistocene fShawangunk group 1 Clovis beds 2 Upper Silurian Cuerbio basalt 2 Decker limestone 1 Laguna basalt flow l Longwood shale l Palomas gravel l Middle Ordovidan Suwanee basalt flow 1 Jacksonburg limestone 1 Wheatland formation 2 Cambrian and Lower Ordovidan Pleistocene (?) Kittatinny limestone 1 Gatuna formation 2 Upper Cambrian and Lower Ordo­ Pleistocene, upper vidan Sand Canyon formation 2 fWallkill limestone 1 San Jon formation 2 Lower Cambrian Tertiary or Quaternary Hardyston quartzite 1 Las Feveras formation 2 Precambrian Tertiary or Quaternary(?) Byram granite gneiss 1 Tulrosa formation > fEdison gneiss l Tertiary Franklin limestone 1 Arriban series 1 fFranklin type 1 (gneiss) Caballo Blanco rhyolite tuff 2 Franklin Furnace band * Cieneguilla limburgite 2 fHamburg Mountain gneiss 1 Cooney quartz latite l Losee diorite gneiss 1 Crankton sandstone 1 fLosee Pond granite * Deadwood Gulch rhyolite tuff l Montville type J (limestone) Deza formation (H. E. Wright, t type 1 (gneiss) Jr., 1954, Am. Assoc. Petro­ fOxford gneiss 1 leum Geologists Bull., v. 38, Pochuck gabbro gneiss 1 no. 8, p. 1830-1833) 506 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New Mexico Continued New Mexico Continued Tertiary Continued Miocene(f) to Pliocene Dog Gulch formation l Mimbres conglomerate 2 Espinaso volcanics 2 Miocene (?) Fanney rhyolite l Chama clays 1 Houston andesite l Datil formation l Jamez marl 1 Lucky formation 2 Last Chance andesite 1 Pedernal chert member (of Latir Peak latite 2 Abiquiu tuff) 2 Llano Estacadan series * Miocene, upper Lufkin rhyolite J Popotosa formation 2 Maya conglomerate 1 Miocene, pre-upper Mineral Creek andesite l El Rito formation 2 Mogollon andesite 1 iocene, upper Monument andesite l Hells Mesa member (of Datil Ortega formation 2 formation) 2 Pacific quartz latite 1 La Jara Peak member (of Datil Picuris tuff 2 formation) 2 Spears member (of Datil forma­ gravels 1 tion) 2 Rio Grande loess ' Selden basalt tongue 2 Miocene, middle(f) to Pleistocene(?) Whitewater Creek rhyolite l (as formation l) Miocene, middle(f) to Pliocene, lower Tertiary(f) Tesuque formation 2 Cueva rhyolite 1 Miocene, middle(f) Orejon andesite 1 Bishops Lodge member (of Otero formation J Tesuque formation) 2 Soledad rhyolite l Oligocene and Miocene Tertiary, upper Thurman formation 2 Albuquerque marl l Oligocene Bear Springs basalt 2 Palm Park formation 2 Kneeling Nun rhyolite tuff 2 Eocene and OHgocene(f) Mimbres Peak formation 2 Galisteo formation (as sand­ Pecosan series J stone l) Pollack quartz latite 2 Eocene Razorback formation 2 Canyon Largo sandstone l Rio Grande series J Chaco marl l Rubio Peak formation 2 Chaman series 1 Sugarlump tuffs 2 Houten sandstone * Tertiary, middle or upper Ratonan series 1 Amah'a formation 2 Eocene(f) Tertiary, middle Baca formation 2 Chicoma volcanic formation 2 Zia marl l Tertiary, lower Eocene, lower Aztecan series * fAlmagre beds 1 Carson conglomerate 1 JLargo beds 1 Wimsattville formation 2 Maxwell terrane 1 Tertiary, lower (?) 2 Macho pyroxene andesites 2 Eocene and older (?) Pliocene(f) fCanyon Largo group 1 Chuska sandstone 1 fPinyon Mesa group 1 Eagle Nest formation 2 Paleocene Pliocene, upper, or Pleistocene Nacimiento group 1 or formation Ancha formation 2 Puerco formation 1 Servilleta formation 2 Torrejon formation l Cretaceous or younger Miocene and Pliocene(f) Hanover granodiorite porphyry 2 Los Pinos gravel (as member of Santa Rita granodiorite porphyry 2 Hinsda o1 formation J) Cretaceous and Paleocene Probably Miocene and Pliocene Raton formation 1 Placita marl l Cretaceous Miocene Chacra J (terrane) Abiquiu tuff 2 Gallinas shale 1 Be 11 Top formation 2 Mora sandstone 2 Uvbs basalr 2 Pueblan series 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 507

United States Continued United States Continued New Mexico Continued New Mexico Continued Cretaceous Continued Upper Cretaceous Continued Sanastee sandstone member (of Juana Lopez sandstone member Mancos shale) 2 (of Carlile shale) 2 Whim Hill breccia 2 Kirtland shale 1 Cretaceous (?) La Cruz Peak formation 2 Pyramid shale 1 La Jara shale 1 Upper Cretaceous and Tertiary (?) La Ventana tongue (of Cliff McRae formation 2 House sandstone); (as sand­ Upper Cretaceous and Tertiary, stone member of Mesaverde lower formation J) Hall Lake member (of McRae t Madrid formation l formation) 2 f Miguel formation l Jose Creek member (of McRae Mulatto tongue (of Mancos formation) 2 shale) » Upper Cretaceous fNavajo shales l Allison member (of Menefee North Hogback tongue (of Point formation); (as barren member Lookout sandstone) 2 of Mesaverde formation l) Ojo Alamo sandstone 2 Archuleta shale 1 Pescado tongue (of Mancos Atarque member (of Mesaverde shale) 2 formation) 2 Pictured Cliffs sandstone l Barker Dome tongue (of Cliff Pina Vititos sandstone 1 House sandstone) 2 fPlacer Mountain group 1 Bartlett barren member (of Cre­ fPrieta sandstone 1 vasse Canyon formation); (as Puercan series J barren member of Mesaverde fPunta de la Mesa sandstone formation *) member (of Mesaverde forma­ Beechatuda tongue (of Cliff tion) 1 House sandstone) 2 Pyramid conglomerate 1 fBell Mountain sandstone mem­ Rail Canyon sandstone member ber (of Miguel formation) 1 (of Vermejo formation) * Cano member (of Mesaverde Satan tongue (of Mancos shale) 1 formation) 2 Sierra Blanca series or coal meas­ fChacra sandstone member (of ures J Mesaverde formation) 1 fTocito sandstone lentil (of fChamiso formation 1 Mancos shale) 1 Cholla Canyon tongue (of Cliff Tohachi formation (as shale l) House sandstone) 2 Tres Hermanos sandstone mem­ Crevasse Canyon formation 2 ber (of Mancos shale) 1 Dalton sandstone member (of Tuscon sandstone l Crevasse Canyon formation); (as member of Mesaverde Twowells sandstone lentil (of formation J) Mancos shale) 2 Dilco coal member (of Crevasse Ute Canyon tongue (of Cliff Canyon formation); (as mem­ House sandstone) 2 ber of Mesaverde formation *) Vermejo formation 1 Farmington sandstone member Upper(f) Cretaceous (of Kirtland shale) l Beartooth quartzite 1 Fort Stanton shale 1 Lower Cretaceous l Broken Jug limestone 2 Gallego sandstone member (of Corbett sandstone 2 Gallup sandstone); (as member Garrett conglomerate l of Miguel formation J) Hidalgo volcanics 2 Gallup sandstone (as member of Howells Ridge formation 2 Mesaverde formation *) Mesa Rica sandstone (as member Gibson coal member (of Cre­ of Purgatoire formation 2) vasse Canyon formation); (as Pajar it o shale (as member of member of Mesaverde forma­ Purgatoire formation 2) tion l) Playas Peak formation 2 Horsehead tongue (of Mancos Redondo sandstone 2 shale) 2 Revuelto shales 2 Hosta tongue (of Point Lookout Ringbone shale 2 sandstone); (as sandstone mem­ Sarten sandstone l ber of Mesaverde formation J) Skunk Ranch conglomerate 2 508 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued New Mexico Continued New Mexico Continued Lower Cretaceous Continued Permian Continued Tucumcari shale (as beds l) fManzano group * Tucumcarian series 2 fNogal formation 1 Jurassic fPecos formation 1 Chavez member (of Morrison Pecos Canyon sandstone l formation) 2 fPicacho limestone * fOcate sandstone 2 Permian(f) Prewitt sandstone member (of Pecos shale l Morrison formation) 2 Torrance shale * Thoreau formation or sandstone 2 Permian (Ochoa) Jurassic and Triassic(f) Culebra dolomite member (of fZunian series 1 Rustler formation) 2 Jurassic(f) Fletcher anhydrite member (of Amarillo sandstone 1 Salado formation) 2 (subsur­ Upper Jurassic face) Chaquaqua shale 1 La Huerta siltstone member (of Todilto limestone (as member of Salado formation)2 (subsurface) Morrison formation l) Magenta member (of Rustler Zuni sandstone l formation) 2 tZuni shale * Ochoa series 2 (subsurface and Middle Jurassic surface) Travester shale 1 Vaca Triste sandstone member Triassic to Lower Cretaceous (f) (of Salado formation) 2 (sub­ Puertocito formation J surface) Triassic Naranjo formation 2 Permian (Guadalupe) Triassic(f) Azotea tongue (of Seven Rivers Endee shale 1 formation); (as tongue of Carls­ Lobo formation 2 bad limestone !) Lukachukai sandstone * Carlsbad group (as limestone *) Sheep Pen Canyon formation J Chalk Bluff formation l Sloan Canyon formation 1 Grayburg formation 2 (subsur­ Upper Triassic face) Agua Zarca sandstone member Ocotillo silt member (of Tansill (of Chinle formation) 2 formation) 2 Correo sandstone member (of Queen formation (as sandstone Chinle formation) 2 member of Chalk Bluff forma­ Pierce Canyon redbeds 1 tion i) Poleo sandstone * lentil (of Seven Rivers formation or gypsi- Chinle formation) ferous member (of Chalk Bluff Redonda formation (as member formation) 1 of Chinle formation 2) Shattuck member (of Queen Salitral shale tongue (of Chinle formation) 2 formation) 2 Tansill anhydrite or formation 2 Santa Rosa sandstone l Three Twins member (of Chalk fSenorito sandstone lentil (in Bluff formation) * Chinle formation) l Permian (Leonard and Guadalupe) l fChupadera formation l Permian and Triassic Hondo sandstone member (of t Pecos Valley red beds 1 San Andres formation); (as Permian member of Chupadera forma­ Aqua Torres formation 2 tion ») Artesia sands > (subsurface) San Andres limestone (as mem­ Bernal formation 2 ber of Chupadera formation*) fBernalilan series 1 Permian (Leonard) Bernalilo shale 1 Canas gypsum member (of Yeso Bluewater formation 2 formation) 2 Bower sand 1 (subsurface) Drinkard sandy member (of Ceja * Yeso formation) 2 (subsurface) Chaves shale 1 Glorieta sandstone 1 fCimarron formation 1 Joyita sandstone member (of fDog Canyon h'mestone 1 Yeso formation) 2 Eddy sandstone 1 Los Vallos member (of Yeso fGym limestone 1 formation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 509

United States Continued United States Continued New Mexico Continued New Mexico Continued Permian (Leonard) Continued Pennsylvanian (Virgil) Con. Lovington sandstone member (of Keller group 2 San Andres formation) 2 Moya formation 2 Meseta Blanca sandstone mem­ Pennsylvanian (Missouri) ber (of Yeso formation) 2 San Ysidro member (of Yeso Adobe formation 2 formation) 2 Beeman formation 2 Torres member (of Yeso forma­ Burrego formation 2 tion) 2 Coane formation 2 Yeso formation (as member of Council Spring limestone 2 Chupadera formation J) Hansonburg group 2 Permian (Wolfcamp and Leonard?) Story formation 2 Abo sandstone 1, red beds 1, or Veredas group 2 formation Pennsylvanian (Des Moines) Permian (Wolfcamp) Armendaris group 2 Bursum formation 2 Bplander group 2 Pendejo tongue (of Abo forma­ Cieneguilla formation 2 tion) 2 Cortado formation 2 Carboniferous Elephant Butte formation 2 Ladronesian series J Garcia formation 2 Lunasan series J Warmington limestone member Sandia quartzites J (of Elephant Butte forma­ fSandia series 1 tion) 2 Pennsylvanian and Permian Whiskey Canyon limestone 2 Magdalena group or limestone l Pennsylvanian (Derry) Pennsylvanian Apodaca formation 2 Alamito shale l Arrey formation 2 Atrasado member (of Madera Cuchillo Negro formation 2 limestone) 2 Derry series 2 Bar B formation 2 Fra Cristobal formation 2 Bullington member (of Mag­ Green Canyon group 2 dalena formation) 2 Hot Springs formation 2 Coyote sandstone member (of Mud Springs group 2 Madera limestone) J Pennsylvanian (Morrow) Don limestone l Log Springs formation 2 Gobbler formation 2 Lower Pennsylvanian Gray Mesa member (of Madera Sandia formation 1 limestone) 2 Humboldt formation J Mississippian, Pennsylvanian, and Incarnacion fire clay 1 Permian Madera limestone l or formation fFierro limestone l Maderan series 1 Mississippian Manzanan series 1 Berenda limestone 1 Montosa limestone 1 Grande limestone 1 Mosca limestone l Kelly limestone 1 Mountain Home shale J Sierra limestone 1 Nakaye formation 2 Silver-pipe limestone 1 Oscuro limestone l Socorran series l Oswaldo formation l Upper Mississippian Placitos limestone l Arroyo Penasco formation 2 Red House formation 2 Lower Mississippian Red Tanks member (of Madera Alamogordo member (of Lake limestone) 2 Valley formation) 2 fRio Grande series * Andrecito member (of Lake Val­ Syrena formation l ley formation) 2 Pennsylvanian (?) Arcente member (of Lake Valley Antonito limestone J formation) 2 Gallegos sandstone J Tellera limestone 1 Caballero formation 2 Pennsylvanian (Virgil) Caloso formation 2 Bruton formation 2 Dona Ana member (of Lake Del Cuerto formation 2 Valley formation) 2 Fresnal group 2 Hanover limestone 1 Holder formation 2 Lake Valley limestone l 510 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New Mexico Continued New Mexico Continued Lower Mississippian Con. Upper Cambrian(f) Nunn member (of Lake Valley Carrasco limestone 1 formation) 2 Middle Cambrian Tierra Blanca member (of Lake Dragoonan series 1 Valley formation) 2 Precambrian Devonian or Mississippian(?) Agua Caliente gabbro 2 Chloride formation x Albuquerquan series l Devonian Antonio slate 1 Martinian series l Badito quartzite member (of Sly Gap formation 2 Hopewell series) 2 Upper Devonian Blue Springs muscovite schist 2 Bella shale 1 Cabresto metaquartzite 2 Box member (of Percha shale Cleveland Gulch quartzite mem­ formation) 2 ber (of Hopewell series) 2 Contadero formation 2 Percha shale 1 Dixon granite 2 Ready Pay member (of Percha Embudo granite 2 shale) 2 Garnuan series 1 Silver shales 1 Graphic lavas 1 Volusia shale J Hondo slate 2 Middle Devonian Hopewell series 2 Onate formation 2 Lacorocah meta-andesite tuff Perchan series J member (of greenstone com­ Silurian plex) 2 Santa Rita limestone 1 Los Pinos granite 2 Silurian(f) Ninos schist l Cibola limestone 1 Ortega quartzite 2 Naiad limestone l Penasco quartzite 1 Middle Silurian Picursian series 1 Mesillan series 2 Petaca schist phase (of Ortega Ordovician and Silurian quartzite) 2 fMimbres limestone * Picuris basalts 2 Ordovician Pilar phyllite member (of Ortega Armendaris limestone 1 formation) 2 Cristobal limestone J Priest granite 2 Frpndosa limestone * fPueblo quartzite * Mimbresian series l Rinconada schist member (of fPinos Altos limestones l Ortega formation) 2 Upper Ordovician Rociada limestone l Aleman formation 2 Sais quartzite 2 Cable Canyon sandstone 2 Sandoval granite 1 Cutter formation 2 Sapello quartzite * Jornada limestone 2 Serna schist * Par value member (of Montoya Sevilleta rhyolite 2 dolomite) 2 Solitario slate l Raven member (of Montoya Taosan series 1 dolomite) 2 Tijeras quartzite 1 Second Value member (of Mon­ Truchas slate 2 toya dolomite) 2 Tusas granite 2 Upham dolomite 2 Vadito formation 2 Valmont dolomite 2 Valencian series 1 Lower Ordovician Vallecitos rhyolites 2 Bat Cave limestone 2 White Ridge quartzite 2 Sierrite limestone 2 Ysidro shale 1 Cambrian Chiricahuan series J Age(f) Hawkins limestone l Incarnacion granite J Cambrian(f) New York Burro quartzite J Pleistocene Upper Cambrian Albany clay 1 Chloridian series * Cowaselon clay 1 Long quartzite l Gardiners clay ' Mangas quartzite l Hempstead gravel member (of fShandon quartzite 1 Manhasset formation) 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 511

United States Continued United States Continued New York Continued New York Continued Pleistocene Continued Devonian Continued Herod gravel member (of Man- Nile sand 1 (subsurfaace) hasset formation) 1 fOnondaga limestone series 1 Jacob sand * Oswayo formation l Jameco gravel or formation ' Richburg sand l (subsurface) Manhasset formation 1 Scio sand J (subsurface) Montauk till member (of Man­ fSherburne group 1 hasset formation) 1 Stony Hollow member (of Mar- Saratoga sand l cellus formation) a Pleistocene (Wisconsin) Devonian (?) Binghamton drift 2 Chipmonk sand l (subsurface) Clean drift 2 Fulmer Valley sand l (subsurface) Tertiary Madison Hill sand ' (subsurface) Far Rockaway gravels 1 Marsh sand l (subsurface) Pliocene(f) Penny sand 1 (subsurface) Mannetto gravel or formation 1 Rice Brook sand 1 (subsurface) Miocene (?) or Pleistocene (?) Upper Devonian Bethpage gravel J Alfred shale 1 Cretaceous Angola shale J member (of West Northport clays 1 Falls formation) Arkwright group 2 Upper Cretaceous Attica shale 1 flsland series 1 Barryville member l (of Shohola Lloyd sand 1 member (of Raritan formation) formation) Beebe limestone l Upper Triassic Bluff Point flagstone l (subsur­ Ladentown diabase 1 face) Palisade diabase l Bradford group l Union Hill trap 1 Cadiz beds l Pennsylvanian Canadaway group 1 fChautauqua conglomerate 1 Canaserage sandstone 1 Ellicottville conglomerate 1 Caneadea member (of Perrys- Olean conglomerate member (of burg formation); (as shale l) Pottsville formation) 1 Canisteo shale member (of Per- fOlean shale 1 rysburg formation) 2 JRock City conglomerate 1 Cardiff shale 1 Devonian or Carboniferous Cascadilla shale member l Allegany Park parvafacies J Cashaqua shale l member (of Killbuck conglomerate lentil (of ) Cattaraugus formation) 1 Cayuta shale member (of Che- Enapp formation l mung formation) l Knapp formational suite 1 Chadakoin beds 1 Knapp monothem 1 Chautauquan group l Mount Herman sandstone 1 fChemung conglomerate l Panama conglomerate l lentil (in Chemung formation 1 Cattaraugus formation) Cherry Creek member (of Ve- fPope Hollow conglomerate l nango formation) 2 fPortville conglomerate 1 Cincinnatus sandstone ! Salamanca conglomerate or sand­ Clarksville oil sand 1 (subsurface) stone member (of Cattaraugus Cornell member 1 (of Portage for­ formation or Conewango for- mation) nation) l Crosby sandstone * Salamanca formational suite l Cuba sandstone 1 Wolf Creek conglomerate lentil Dexterville shale member l (of (of Cattaraugus formation) 1 Chadakoin stage) Devonian Dunkirk shale * member (of Per- Allegany oil sand 1 (subsurface) rysburg formation) Apulia shale 1 or limestone 1 Ellicott shale member l (of Chad­ Cattaraugus formation 1 akoin stage) Butternut shale 2 Enfield facies subgroup l Chenango sandstone 2 Enfleld shale member (of Port­ Delphi Station member (of Ska- age formation) 1 neatles formation) 2 Forestville member (of Canada- Humphrey sand ! (subsurface) way formation) 2 512 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New York Continued New York Continued Upper Devonian Continued Upper Devonian Continued Gardeau shale member (of West Penn Yan tongue (of Falls formation); (as member shale) 2 (see p. 621) of Portage formation x) Perrysburg formation 2 Genesee formation (as group) 1 Pipe Creek shale member (of (see p. 621) Hanover shale); (as member of Geneseo shale l (see p. 621) Wiscoy sandstone x) Genundewa limestone lentil (of Portage group, formation, or Geneseo shale) 1 (see p. 621) shale 1 Gilboa formation 1 fPortage sandstone l Gorham shales 1 {Portland shale l Gowanda shale * member (of Prattsburg sandstone and shale 1 Perrysburg formation) Renwick shale member 1 (of Grimes siltstone member (of Middlesex shale) (see p. 621) ); (as Rhinestreet shale i member (of sandstone l) West Falls formation) Hanover shale * Rock Stream siltstone member Haymaker beds l (of Sonyea formation); (as Hatch shale * member (of West member of Cashaqua shale 2) Falls formation) fRockville sandstone l fHigh Point firestone 1 Rushford sandstone l fHigh Point sandstone 1 Senecan group l Hinsdale sandstone ! Sherburne flagstone member (of Hume shale member (of Perrys­ Portage formation) ^see p. 621) burg formation) 2 Shumia sandstone l flschua sandstone l fSilver Creek shale l Ithaca facies sub-group l Six Mile shale member l (of Ithaca shale member (of Portage Middlesex shale) formation) 1 (see p. 621) Skunnemunk conglomerate l Jamestown conglomerate 1 Slide Mountain conglomerate l Juliand member 1 (of Enfield for­ Sonyea l formation mation) South Wales member (of Perrys­ Kaaterskill formation l burg formation) 2 Kaaterskillian series 2 Standish flagstone l Katsberg red beds * Starkey tongue (of Sherburne Kattel shale 1 formation) 2 Keuka flagstone l Stony Clove sandstone member Laona sandstone l (of Katsberg red beds) 2 Laurens member 1 (of Tully Table Rock sandstone 1 limestone) Tinkers Falls member 1 (of Tully Letchworth shale l formation) Lillibridge sandstone member 1 (of Chadakoin stage) Triphammer shale member * (of Little Genesee conglomerate 1 Ithaca facies subgroup) Long Beards Riffs sandstone 1 Twilight Park conglomerate 2 Machias shale l Unadilla formation l Marathon sandstone member l Van Etten l (zone) (in Ithaca facies subgroup) Wellsburg sandstone member Middlesex shale l member (of (of Chemung formation) l Sonyea formation) Wellsville formation 2 Milo tongue (of West River shale) 2 West Brook member l (of Tully fNaples shale or group formation) New Lisbon member 1 (of Tully Westfield shale 1 formation) West Hill member (of West Northeast shale ' Falls formation); (as forma­ fNunda group l tion i) Nunda sandstone ' member (of West River shale » (see p. 621) West Falls formation) White Church zone 1 Oneonta sandstone 1 Whitesville formation 2 Onteora formation (as red beds J) Williams Brook coquinite mem­ Otselic shale and sandstone 1 ber ! (of Ithaca facies sub­ Parrish limestone bed (as lentil ]) group) (in Cashaqua shale member Wiscoy shale or sandstone * of Sonyea formation) Wittenberg conglomerate l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 513

United States Continued United States Continued New York Continued New York Continued Middle and Upper Devonian Middle Devonian Continued Catskill formation 1 or red beds Moheganter shales and sand­ Erie group l or series l stones l Middle Devonian fMonroe shales l Avery shale l Moorehouse member (of Onon­ Ashokan beds l daga limestone) 2 Athol shale J Morse Creek limestone l Babcock Hill member (of Onon- Moscow shale 1 daga formation) 2 Mottville member (of Skan­ Bakoven shale 1 eateles shale) 1 Bellvale flags or sandstone 1 formation (as Berne member (of Marcellus beds i) shale) 1 Nedrow member (of Onondaga Berwyn member (of Skaneateles limestone) 2 shale) * fNewfoundland grit 1 or quartz- Bridgewater member (of Marcel­ ite 1 lus shale) l Oatka Creek shale (in Marcellus fCanadaigua shale 1 shale) l Cazenovia group 1 Otisco member l (of Ludlowville Centerfleld limestone member formation) (of Ludlowville shale) 1 Otsego member (of Marcellus Cherry Valley limestone (in Mar­ shale) l cellus shale) 1 Owasco member 1 (of Ludlow­ Chittenango member (of Mar­ ville formation) cellus shale) l Panther Mountain shale and Colgate member (of Skaneateles sandstone l shale) l Pecksport member l (of Marcel­ Cornwall shale l lus formation) Deep Run member (of Ludlow­ Pompey member (of Skaneateles ville shale) 1 shale) l Delphi member (of Skaneateles Portland Point member (of Mos­ shale) J cow shale) 1 Edgecliff member (of Onondaga Seneca limestone l limestone) 2 Shaffer shale 1 Eighteenmile Creek member (of fSherburne shale l Ludlowville formation) 2 Skaneateles shale l Hamilton group1 ; formation in Solsville member l (of Marcellus Pennsylvania formation) Ivy Point member l (of Ludlow­ Spafford member l (of Ludlow­ ville shale) ville formation) Joshua submember (of Otisco Spring Brook shale member (of member of Ludlowville forma­ Ludlowville formation) 2 tion) 2 Center member (of Kashong member (of Moscow Onondaga formation) 2 shale) l Stafford limestone member (of King Ferry shale member (of Skaneateles shale) l Ludlowville shale) l Staghorn Point submember 1 Kiskatom formation 1 Stone Mill member (of Ludlow­ Ledyard member (of Ludlowville ville formation) 2 shale) 1 Tichenor limestone member (of Leeds facies (of Schoharie forma­ Ludlowville shale) 1 tion) 2 Tully limestone l Leicester marcasite member (of fUlsterian group 1 Moscow formation) 2 Union Springs member (of Mar­ Levanna shale (in Hamilton cellus shale) 1 formation) 1 Wanakah shale l fLudlowville group l Windom member (of Moscow Ludlowville shale 1 shale); (as shale *) Marcellus shale 1 ; shale member Lower or Middle Devonian (of Romney shale) in Mary­ Carlisle Center formation 2 land Esopus grit, shale l or siltstone Menteth limestone member (of l or forma­ Moscow shale) * tion 514 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New York Continued New York Continued Lower or Middle Devonian Con. Silurian Continued Schoharie grit l fLockport marble 1 Sharon Springs formation 2 Maplewood shale l Lower Devonian Martville sandstone l Alsen (cherty) limestone ' fNiagara limestone * Be craft limestone l {Niagara sandstone 1 Bishop Brook limestone 1 {Niagara shale * fCatskill or Delthyris shaly lime­ 0-atka beds l stone l Olney limestone l Coeymans limestone 1 Oneida conglomerate l Connelly conglomerate 2 tOnondaga group l Deansboro member (of Coey­ fOntario group 1 mans limestone) 2 Ontario series l Glenerie limestone * Otisville shale member (of Shaw- or limestone 1 angunk formation) l Ealkberg limestone l Otsquago sandstone l fKingston beds 1 Phoenix or Schroeppel shale l New Scotland limestone l quartzite 1 , group l, or Reynales limestone (as member sandstone l of J) Oriskany Falls member (of Oris­ Sauquoit beds l kany sandstone) 2 Scajaquada limy shale * Port Ewen limestone l Shawangunk conglomerate l Port Jervis limestone 1 Sterling Station iron ore 1 fSchoharie stage * Verona iron ore l Thacher limestone member (of Wolcott Furnace iron ore l Manlius formation) 2 Silurian(?) Lower (?) Devonian Clark Reservation limestone l Saugerties limy shale 1 Pools Brook limestone l Silurian and Devonian Upper Silurian fCornwall limestones l Akron dolomite l fOnondaga saliferous group 1 Bertie limestone (as member of Silurian x) Bear Creek shale (in Clinton Camillas shale (as member of formation) 1 Salina formation l) Binnewater sandstone (in Salina Cayuga group 1, dolomite, or formation) l series Brewerton shale l Cobleskill limestone or dolo­ Bridgeburg horizon l mite 1 fBuffalo cement bed l Falkirk dolomite 1 Chrysler waterlime l Forge Hollow member (of Bertie fClinton quartzites l formation) 2 Donnelly iron ore 1 Elmwood beds l Fuyk sandstone member (of fEsopus millstone l Rondout waterlime) 2 t Fiddlers Green limestone 1 Glasco limestone lentil (of Rond­ Furnaceville iron ore 1 out waterlime) 2 Furnaceville shale l Le Fever limestone 2 Gasport shaly channel 1 Lyndon gypsum bed * Gates limestone l Manlius limestone l f Green Pond Mountain forma­ fOnondaga salt group l tion l Pittsford shale (as member of Guymard quartzite (W. L. Salina formation J) Bryant, 1926, Am. Philos. Soc. Rondout limestone 1 Proc., v. 65, no. 4, p. 259) Rosendale limestone member Herkimer sandstone 1 (of Salina formation) l High Falls shale l ; formation 1 Salina formation 1 or group in New Jersey Syracuse salt (as member of Jamesville limestone 1 Salina formation *) (subsur­ Kirkland formation 1 face) Kirkland limestone and iron ore 1 Vernon shale (as member of Kodak white sandstone * Salina formation !) Lakeport limestone l Wilbur limestone member^(of fLockport group 1 Salina formation) 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 515

United States Continued United States Continued New York Continued New York Continued Upper Silurian Continued Upper Ordovician Continued Williamsville waterlime and Harter member (of Frankfort shale 1 formation) 2 Middle Silurian Hasenclever member (of Frank­ Brewer Dock member 1 (of Clin­ fort formation) 2 ton formation) Holland Patent * (zone) Clinton formation l or group Indian formation (as Dawes sandstone 2 beds 0 Gasport limestone member (of tLewiston shale 1 ) l Lorraine group l Goat Island member (of Lock- Loyal Creek l (zone) port formation) 2 fMohawk slate group 1 Irondequoit limestone (as mem­ Moose Creek beds l ber of Clinton formation J) Moyer member (of Frankfort Lockport dolomite ' formation) 2 Neahga shale 1 Nowadaga 1 (zone) Niagara group ', limestone, dolo­ Oswego sandstone 1 mite, or series Pulaski shale l Oak Orchard member (of Lock- fSalmon River sandstone l port formation) 2 Sandy Creek beds l (as member of Tremaines Bridge beds l Clinton formation *) l tShelby dolomite l Whetstone Gulf formation l Sodus shale (as member of Wood Creek beds l Clinton formation x) Worthville beds 1 Vanhornsville sandstone 1 Upper Ordovician(?) Westmoreland member (of Clin­ Amawalk granite 2 ton formation) 2 Middle Ordovician Williamson shale member (of Amsterdam limestone l Clinton formation) 1 Austins Glen member (of Nor- Willowvale shale 2 manskill formation) 2 Wolcott limestone (as member Balmville limestone member (of of Clinton formation J) Wappinger limestone) 1 Lower Silurian 1 Albion group (as sandstone !) Camp member (of Denmark Fish Creek shale 2 formation) 2 Rumsy Ridge sandstone member Canajoharie shale 1 (of Fish Creek formation) 2 Chaumont formation l Whirlpool sandstone (as member Chazy group 1 or limestone Cumberland Head shale 1 of Albion sandstone *) Chuctenunda J (zone) Ordovician Crown Point limestone l Burden conglomerate 1 Denmark member (of Sherman t Dudley limestone 1 or series x Fall formation) 2 JHudson schist 1 Dolgeville shale 1 Marlboro member (of Hudson Fort Plain l (zone) River formation) 2 Gansevoort J (zone) Peekskill phyllite l Glendale member of (Denmark Poestenkill fault breccia 1 formation) 2 fTaconic slate l Glens Falls limestone 1 fTrenton conglomerate l Hounsfield bentonite l Trenton Falls series 1 slate l Ordovician and Cambrian(?) Leray limestone member (of fChamplain division 1 Lowville limestone) l Upper Ordovician and Silurian Lorette formation l Brayman shale l Lowville limestone l t Medina group l Minayille member (of Canajo­ fOswegan period or group 1 harie formation)2 Upper Ordovician t Mohawk limestone l Atwater Creek shale 1 Mohawkian series l Bennett Bridge beds 1 Morphy 1 (zone) Deer River shale 1 Mount Merino chert and shale Fairfield slate l member (of Normanskill for­ Frankfort shale 1 mation) 2 5

United States Continued United States Continued New York Continued New York Continued Middle Ordovician Continued Lower Ordovician Continued Normanskill shale 1 Tribes Hill limestone * Pamelia limestone l Valcour limestone l Poland limestone member (of Warwick limestone 1 Denmark formation) 2 Whitehall formation 2 Rathbun limestone member (of Wolf Hollow limestone member Denmark formation) 2 (of Tribes Hill formation) s Rust limestone member (of Co- Cambrian, Ordovician and probably bourg formation) 2 Silurian Russia limestone member (of tChamplain group 1 Denmark formation) 2 Cambrian and Ordovician Rysedorph conglomerate l Fishkill limestone 1 Schenectady formation l fPoughquag limestone l Sherman Fall formation 1 Cambrian Snake Hill formation 1 Ashley Hill limestone l Sprakers l (zone) Claverack conglomerate (In Steuben limestone member (of Schodack formation) 2 Cobourg formation) 2 fSaratoga formation, group, or Tackawasick limestone l series 1 Trenton limestone or group l Cambrian(f) Van Schaick l (zone) fStissing quartzite l Watertown limestone l Upper Cambrian or Ordovician Middle(?) Ordovician Broadalbin passage beds 2 Stony Point shale 1 fHudson formation l Lower and Middle Ordovician group l f Mohawk group 1 Ritchie limestone 2 Lower Ordovician Upper Cambrian to Lower Ordovician Bald Mountain limestone l Hill beds 2 Baldwin Corner formation (R. H. Upper Cambrian Flower, 1952, in Geol. Soc. Adirondack-Border series 2 America Guidebook for field Ausable sandstone l trips in New England, p. 35) Briarcliff dolomite 2 or limestone1 Dewey Bridge dolomite (R. H. Benson dolomite member (of Flower, ibid.) Tribes Hill formation) 2 Galway formation 1 Bucks Bridge mixed beds l fGreenfield limestone 1 Chuctununda Creek dolomite 2 Heuvelton sandstone * Copake limestone * Hoyt limestone member (of Cranesville dolomite 2 Theresa dolomite) 1 or dolo­ Day Point limestone l mite 1 Deepkill shale l Little Falls dolomite 1 fDepauville waterlime * Neelytown limestone l Fonda limestone member (of Pine Plains formation 2 Tribes Hill formation) 2 fPotsdam limestone J Fort Ann limestone member (of Potsdam sandstone 1 Tribes Hill formation) 2 Skene dolomite member (of Fort Johnson member (of Tribes Whitehall formation) 2 'Hill formation) 2 Theresa dolomite * Gailor dolomite 2 Great Meadows formation (R. H. Upper Cambrian(?) Flower, ibid.) Keeseville sandstone l Halycon Lake calc-dolomite 2 Lower Cambrian to Middle Hewittsville calcilutites or beds l Ordovician Mosherville sandstone member Barnegat limestone J (of Gailor dolomite) 2 Newburgh limestone 1 Norton limestone member (of Peekskill Creek limestone 1 Tribes Hill formation) 2 fWappinger limestone l Ogdensburg formation l Lower and Middle Cambrian Palatine Bridge limestone mem­ Stissing dolomite 1 ber (of Tribes Hill formation) 2 Lower Cambrian Rochdale limestone 1 Diamond Rock quartzite l Schaghticoke shale * Eagle Bridge quartzite l Smith Basin formation (R. H. Eddy Hill grit » Flower, ibid.) Greenwich formation l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 517

United States Continued United States Continued New York Continued New York Continued Lower Cambrian Continued Precambrian Continued Mettawee slate l Jayville granite 2 Nassau formation (as beds *) Johnsburg limestone l Poughquag quartzite l Keeseville granite l Schodack formation l Kingsbridge marble l Troy shales 1 Keene gneiss 1 Lower Cambrian(f) Long Lake gneiss l Rensselaer graywacke 1 Loon Lake quartz-syenitic com­ Precambrian, Cambrian, and plex 2 Ordovician Lowerre quartzite l Hudson schist * Lowville granite l Precambrian Lyon Mountain granite ' gneiss Adirondack anorthosyte 1 Macomb granite 1 Adirondack gneiss 1 Mahopac granite l Alexandria syenite * t Manhattan group l Alexandria type J (granite) {Manhattan gneiss 1 Aliens Falls fanglomerate 2 Manhattan schist l Antwerp type granite 2 Marcy anorthosite l fAusable granite 1 Matteawan granite * Ausable syenite l Mohegan granite l Bald Hill granite gneiss * Moon Lake diorite 1 Barton gneiss * Morris granite l Beach Mountain paramphibo- Mott Haven limestone l lite 1 New Bremen granite 2 Bear Pond schist l New Rochelle serpentine * Beech Mountain amphibolite 1 Orchard gneiss l Brooklyn gneiss l fOswegatchie series 1 Bryant Lake limestone 1 Pawling gneiss l California granite 1 Peekskill diorite gneiss l Canada Hill granite 1 Peekskill granite 1 Canton phacolithic complex l Piercefield gneiss 1 Catamount schist l Picton granite * Cat Hill gneissoid granite 1 Pitcairn gneiss complex 2 Chesterfield limestone 1 Pleasant Lake gabbro 2 Chippewa granite l Pochuck diorite l Croghan syenite granite com­ Pyrites granite 1 plex 1 Ravenswood granodiorite 1 fDannemora formation l Reservoir granite 1 DeKalb granite l Reservou- Hill granite ' Diana syenite complex l Rossie intrusive complex l Dixon schist 1 Russell feldspathic gabbro 2 Dresden amphibolite l Sacandaga quartzite 1 Elizabeth gabbros 1 St. Regis granite 2 Elizabethtown gabbro 1 Santa Clara complex 2 Faxon limestone l Saranac formation 1 Fordham gneiss 1 Shenandoah Mountain granite 1 Fort Washington gneiss * Simons syenite 1 Geers Corners gabbro 2 Sing Sing marble l Glenham gneiss 1 Split Rock * (type granite) gabbro 2 Sprout Brook limestone * Gouverneur granite 1 Stark complex (as quartz syenitic Gouverneur limestone 1 complex 2) Grampus gneiss l Storm King granite l Hague gneiss l Swede Pond quartzite l Hammondville gneiss 1 Theresa syenite l Harlem gneiss 1 Trout Pond limestone 1 Hawkeye granite l gneiss Trumbull gneiss 1 Hermon granite gneiss (as type *) Tuckahoe marble l High Bridge gneiss 1 Tupper syenite 1 Highland gneiss 1 Union Corners granite l complex 2 Westchester gneisses and gran­ Hyde granite 1 ites l Indian River hornblende syenite 2 Whiteface anorthosite l Inwood limestone 1 Yonkers granite l 518 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued New York Continued North Carolina Continued Precambrian(f) Cambrian Harrison diorite 1 Draytonville conglomerate mem­ Hoboken serpentine l ber (of Kings Mountain quartz- Staten Island serpentine l ite) 1 Age(f) Kings Mountain quartzite * Bedford "augen" gneiss 1 Lower Cambrian Bethel pyroxene diorite 1 Andrews schist 1 Bull Pond limestone 1 Brasstown schist l Cortland series * Brevard schist 1 Croton Falls hornblendite 1 fCherokee slates l Hortontown basic eruptives * Clingman conglomerate * Macombs Dam gneiss 1 Hazel slate 1 Natural Bridge limestone 1 Murphy marble l Peach Lake diorite * Nottely quartzite l Peekskill norite l Tusquitee quartzite 1 Poundridge granite * Yalleytown formation 1 Randels Island gneiss 1 Vann quartzite 2 Syracuse serpentine 1 Precambrian and Cambrian North Carolina fKings Mountain group, 1 series, 1 Pleistocene or slates 1 Cape Fear coquina 2 fLinville slates 1 Castalia sand 2 fPiedmont group l fChowan formation l Precambrian and Cambrian(f) Coharie formation l fBuncombe group 1 Kure sandstone 2 Precambrian Pamlico formation ! or sand Aaron slate l Pine sand 2 Beech granite 1 Pliocene, lower Bessemer granite 1 Croatan sand l Big Butt quartzite 2 Miocene, upper Blowing Rock gneiss * Duplin marl l Carolina gneiss l Miocene, middle(?) and upper Cranberry granite l fMurfreesboro stage l Flattop schist * Miocene, lower Great Smoky group (as conglom­ Trent marl l erate !) Eocene, upper, and Miocene, lower Henderson granite 1 fWilmington beds 1 Humpback gneiss 2 Eocene, middle and upper Hurricane graywacke 2 Castle Hayne limestone (as marl*) Max Patch granite 1 Upper Cretaceous Montezuma schist 1 fBladen formation l Raleigh graphite 2 fCape Fear formation l Snowbird group (as formation J) Snow Hill marl member (of Thunderhead sandstone (as con­ Black Creek formation) 1 glomerate x) Triassic Precambrian(?) Lowes Grove beds 2 fMonroe beds or slates 1 Nelson beds 2 Nantahala slate l Triassic(f) Bakersyille gabbro ' Bearwallow schist 2 Upper Triassic Buck Ridge schist 2 t Chatham series 1 Purefoys Mill series 1 Cumnock formation l Spruce Pine alaskite 2 fDan River series l Tempa schist 2 fDeep River formation l or se­ North Dakota ries l Pleistocene Pekin formation l Lake Agassiz clays 1 Sanford formation l Lake Agassiz silt l Carboniferous(?) Tertiary (f) Whiteside granite ' Mandanan series 1 Devonian (?) Eocene Cherryville quartz monzonite 2 Beaver Creek coal group l Ordovician Golden Valley formation 2 Toluca quartz monzonite 2 Yule coal group J INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 519

United States Continued United States Continued North Dakota Continued Ohio Continued Paleocene Pennsylvanian Continued Almpnt sandstone (in Tongue Brill sand l (subsurface) River member of Fort Union Buell Run sand 1 (subsurface) formation) 2 Cow Run sandstone (in Cone­ Cannonball marine member (of maugh formation) 1 ); (as Door Run shale member (of member of J) Allegheny formation) 2 Fort Union formation 1 Dresden sandstone (in Pottsville Great Bend coal group 1 formation) l Medora coal group 1 (in Tongue Fishpot sandstone (in Monoga- River member of Fort Union hela formation) l formation) Flag Spring limestone (in Cone­ Sentinel Butte shale member (of maugh formation) 1 Fort Union formation) 1 Flint Ridge clay (in Pottsville Cretaceous formation) 1 Breien member (of Hell Creek Flint Ridge flint (in Allegheny formation) 2 formation) l Jurassic Flint Ridge limestone 1 Kline member (of Nesson forma­ Flint Ridge shale (in Pottsville tion) 2 (subsurface) formation) 1 Nesson formation 2 (subsurface) Fly sandstone 2 Poe evaporite member (of Nesson Gaysport member (of Cone­ formation) 2 (subsurface) maugh formation) l Mississippian and Devonian(f) Germantown sand l (subsurface) Bakken formation 2 (subsurface) Goose Run sand l (subsurface) Middle(?) and Upper Devonian Gore limestone (in Pottsville Souris River formation 2 (subsur­ formation) > face) Middle Devonian Hamden limestone or member (in Prairie formation (as evaporite 2) Allegheny formation) l (subsurface) [ Hanging Rock limestone (in Ohio Allegheny formation) l Pleistocene Harlem clay (in Conemaugh for­ Springfield clay l mation) l Pleistocene (Wisconsin) Harrison member (of Pottsville Chillicothe till l formation) 1 Pleistocene (pre-Illinoian) Hecia sandstone (in Allegheny Minford silt ' formation) * Permian Hewetts Branch sandstone (in Hostetter limestone 2 Allegheny formation) l Marietta sandstone 1 Hockingport sandstone 2 Muskingum conglomerate (in fHowenstein limestone (in Alle­ ) l gheny formation) 1 Pennsylvanian Huckleberry clay (in Pottsville Anderson clay 1 formation) l Athens group l Kittanning limestone (in Alle­ Anthony cyclothem (including gheny formation) 1 Anthony shale and sand­ Lawrence clay (in Allegheny stone) 2 formation) 1 Ballou clay (in Allegheny forma­ Logan fire clay (in Pottsville tion) * formation) 1 Barton clay (in Conemaugh for­ Lowell limestone (in Allegheny mation) l formation) l Bear Run member (of Pottsville Lowellville limestone (in Potts­ formation) l ville formation) l Bedford clay (in Pottsville for­ McArthur member (in Pottsville mation) l formation) l Bellaire sandstone (in Cone­ Macksburg sandstone l maugh formation) l Mason clay (in Conemaugh for­ Big Run sandstone 2 mation) 1 Bloomfield limestone (in Cone­ fMassillon sandstone (in Potts­ maugh formation) 1 ville formation) l Boggs member (of Pottsville Maxville block ore (in Pottsville formation) 1 formation) 1 520 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Ohio Continued Ohio Continued Pennsylvanian Continued Pennsylvanian Continued fMeigs Creek white limestone (in Zaleski flint (in Allegheny forma­ Monongahela formation) 1 tion) * Mitchell sand l (subsurface) Zoar limestone (in Pottsville for­ Moxahala clay (in Allegheny for­ mation) * mation) l Upper Pennsylvanian Nagle sand l (subsurface) Ames limestone member (of Norris limestone (in Allegheny Conemaugh formation) l formation) 1 Cambridge limestone member Oak Hill clay (in Allegheny for­ (of Conemaugh formation) * mation) 1 Ewing limestone member (of Ogan clay (in Allegheny forma­ Conemaugh formation) l tion) i Middle Pennsylvanian fOhio conglomerate ! Putnam Hill limestone member Patriot limestone (in Conemaugh (of Allegheny formation) l formation) 1 Mississippian Peeker sand l (subsurface) Allensville member (of Logan Pomeroy sandstone (in Monon­ formation) l gahela formation) 1 Armstrong member (of Cuya- Porterville fossiliferous horizon hoga formation) l or limestone (in Conemaugh Aurora siltstone member (of formation) J Orangeville shale) l Poverty Run limestone (in Potts­ 1 or formation ville formation) > l or formation Redstone clay (in Monongahela fBerea shale * formation) J Berne member (of Cuyahoga Round Knob horizon or shale formation) 1 member (in Conemaugh for­ Black Hand formation 1 or sand­ mation) l stone Salem limestone (in Allegheny fBrecksville shale member (of formation) 1 Orangeville shale) 1 Schramm sand l (subsurface) Buena Vista sandstone member Scioto freestone (in Allegheny (of Cuyahoga formation) 1 formation) 1 Burbank member (of Cuyahoga f Sciotoville fire clay (in Pottsville formation) l formation) l Byer member (of Logan forma­ Sharon clay 1 tion) 1 fShawnee limestone (in Alle­ Canter limestone l gheny formation) l Chardon siltstone member (of Skelley limestone (in Conemaugh Orangeville shale); (as sand­ formation) l stone1) Snow Fork limestone (in Alle­ Churn Creek member (of Cuya­ gheny formation) l hoga formation) 1 fStillwater sandstone (in Cone­ fCity Ledge sandstone (in Cuya­ maugh formation) l hoga formation) 1 Strasburg cyclothem (including Cuyahoga formation, group l or Strasburg shale and/or sand­ shale stone) 2 Euclid sandstone member (of fSummerfield limestone (in Cone­ Bedford shale); (as lentil !) maugh formation) 1 Fairfield member (in Cuyahoga Tionesta clay (in Pottsville for­ formation) 1 mation) l Granville beds 1 Vandusen cyclothem (including Granville shale facies l (of Cuya­ Vandusen clay, shale, and hoga formation) sandstone) 2 Hamden sand 1 (subsurface) Hanover pebble bed (in Cuya­ Vincent sand 1 (subsurface) hoga formation) 2 Washington ville member (of Alle­ Henley shale member (in Cuya­ gheny formation) 1 hoga formation) : Wilgus clay (in Conemaugh for­ Hocking Valley conglomerate mation) l facies l (of Cuyahoga forma­ Winters clay (in Allegheny for­ tion) mation) 1 Killbuck shale facies (of Cuya­ Wolf Creek sand l (subsurface) hoga formation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 521

United States Continued United States Continued Ohio Continued Ohio Continued Mississippian Continued Middle Devonian Continued Licking shale 1 Dublin blue shale 1 Lithopolis member (in Cuyahoga East Liberty bone bed (in formation) * Columbus formation) 2 Logan formation 1 Eversole chert 1 t Logan group 1 Klondike member (of Columbus fLogan limestone or flint (in limestone) > Logan formation) 1 Marble Cliff limestone (in Co­ 1 lumbus limestone) 1 fNewtonville limestone ' Marblehead limestone (in Co­ Pleasant Valley member (of lumbus limestone) 1 Cuyahoga formation) 2 Plum Brook shale 2 Portsmouth member (in Black Plum Creek shale l Hand formation) 2 1 Pretty Run sandstone facies (of Prout series ' Logan formation) 2 Sandusky limestone l Racoon shale 1 Silica shale (in Traverse forma­ Rarden shale member J (of Cuya­ tion)! hoga formation) 1 or forma­ Richland limestone and flint * tion Rittman conglomerate lentil (of Tenmile Creek dolomite 2 Cuyahoga formation) 1 Venice member (of Columbus River Styx conglomerate facies limestone)' (of Cuyahoga formation) 2 West Jefferson sandstone l fRoyalton formation 1 Lower Devonian Rushville group * Austinburg sand 1 (subsurface) Sagamore sandstone member Cambridge sand * (subsurface) (of Bedford shale); (as lentil J) Holland sandstone 1 Scioto Valley shale facies x (of Lucas formation (as dolomite ') Cuyahoga formation) Monclova sandstone 1 Scotts Creek flint' Silurian 1 Tinkers Creek shale facies (of Beavertown marl (in Brassfield Cuyahoga formation) 2 limestone) 1 Toboso conglomerate facies l (of Harriett formation 2 Cuyahoga formation) t Montgomery formation 1 Vinton member * (of Logan for­ Stadler sand 1 (subsurface) mation) SUunan(f) Warren sandstone * Hillsboro sandstone 1 fWaverly conglomerate 1 Upper Silurian Welsh stray sand 1 (subsurface) Bass Islands dolomite l Mississippian and Devonian(f) 1 member fSunbury calciferous sandrock 1 (of Bass Island dolomite) fWaverly group 1 Put-in-Bay dolomite member (of Devonian(f) Bass Island dolomite) 1 Grand Rapids sandstone * Tymochtee formation (as shale x) Upper Devonian Middle Silurian 1 1 Cleveland member (of Ohio Cedarville dolomite (as lime­ shale); (as shale ') stone !) fErie shale » Dayton limestone l Huron member (of ); Durbin formation l (as shale x) Eaton beds 1 Ohio shale 1 1 1 1 fOlmsted shale member (of Massie clay 1 ) 1 Newburg sand x (subsurface) Scioto slates and shales 1 * Middle Devonian Piqua stone 1 Bellepoint member (of Columbus Springfield limestone l or dolo­ limestone) * mite 1 West Union limestone 1 1 Lower Silurian Delhi limestone 1 Centerville formation 1 522 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Ohio Continued Oklahoma Continued Upper Ordovician Lower Cretaceous Continued Arnheim shale ! ; formation in Bokchitp formation 1 Kentucky; limestone in Ten­ Caddo limestone 1 nessee Camp Supply beds 1 Bellevue limestone member (of Comet CreeK bed l McMillan formation) l Good!and limestone l Blanchester division (in Rich­ flndian Territory division 1 mond group) 1 Eiamichi formation 1 Cincinnatian series 1 Upper Jurassic Clarksville division (in Richmond Exeter sandstone 1 group) 1 Triassic(?) Corryville shale member (of Mc­ Millan formation) 1 Custer formation 1 fCovington group * Permian Eden group : or formation Addington formation 1 Fairmont limestone member (of Altona dolomite member (of ) l Blaine gypsum) > Fairview formation 1 fAmphitheater dolomite 1 Fort Ancient division (in Rich­ Antelope Flats member (of Well­ mond group) 1 ington formation) 2 Fulton shale 1 Anthony sandstone 2 fHill Quarry beds 1 Antioch sandstone * tLebanon beds 1 Asher formation 1 McMicken member (in Latonia Auger conglomerate lentil (of shale) 1 Wichita formation) 1 McMillan formation 1 Beaver gypsum 1 Mount Auburn shale member (of Bessie member (of Quartermaster McMillan formation) l formation) 1 Mount Hope shale member (of Billings member (of Wellington Fairview formation) l formation) 2 Point Pleasant limestone 1 Bison banded member * (of Hen- Turkey Track limestone layer (in nessey shale) Richmond group) 1 Blackwell sand x (subsurface) Waynesville shale 1 ; limestone Blaine gypsum or formation 1 in Kentucky Bu-Vi-Bar bed » t Warren beds 1 Caddo sand x (subsurface) Upper Ordovician(?) Cedartop gypsum member (of Belfast bed l Blaine gypsum) 1 Middle Ordovician Chaney gypsum member (of Bromley shale (in Cynthiana Blaine gypsum) 1 formation) J (see p. 622) Chapman dolomite 1 fRiver Quarry beds 1 Chickasha formation 1 Oklahoma Cimarron anhydrite 2 Quaternary (?) Cloud Chief formation (as gyp­ fPeaceable sand l sum x) Pleistocene Cornish sandstone member 1 Gerty sand 1 Greta dolomite (in Blaine for­ Tertiary mation) 1 Black Mesa basalt 1 Grouse limestone or formation Tertiary(f) (as member of Garrison shale x) fFort Sill series » fCushing limestone member (of Pliocene or Pleistocene Elmdale formation) 1 Grandfield conglomerate 1 fCyril gypsum member r (of Pliocene, lower Greer formation) Laverne formation 1 fDelphi dolomite 1 Upper Cretaceous Doe Creek sandstone member fSilo sandstone 1 (of Marlow formation) 2 Lower and Upper Cretaceous Doxey member (of Quartermas­ Washita group 1 ter formation) 1 Lower Cretaceous Duncan sandstone 1 t Antlers sand 1 Elk City member (of Quarter­ Baum limestone member (of master formation) 1 Paluxy sand) 2 El Reno group (as formation x) Bennington limestone 2 Enid formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 523

United States Continued United States Continued Oklahoma Continued Oklahoma Continued Permian Continued Permian Continued Evansyille sandstone beds (in Patsy gas sand ' (subsurface) Wellington formation) 1 Payne sandstone * Fairmont shale member (of Hen- Piedmont sandstone 2 nessey shale) * Post Oak conglomerate member Fallis sandstone member (of (of Wichita formation) 2 Wellington formation) 1 Propserity sand * (subsurface) Ferguson gypsum member (of Pure ell sandstone lenses (in Hen­ Blaine gypsum) 2 nessey shale) 1 Foraker limestone1 ; fmember (of Quartermaster dolomite (in Quar­ Sand Creek formation) * termaster formation) * Fortuna sand * (subsurface) Quartermaster formation 1 Garber sandstone 1 Red Eagle limestone (as member Garvin beds * of Elmdale formation *) fGlass Mountain formation * fRed Eagle shale (in Elmdale fGreenfield dolomite (in White- formation) * horse sandstone) 1 Reeding sandstone 2 fGreer formation * Relay Creek dolomite 1 beds (in Hart limestone member (of Strat­ Marlow formation) ford formation 1 and Wichita Rush Springs sandstone or forma­ formation) tion (as member of Haskew gypsum member (of sandstone *) Blaine formation) * Salt Creek marble (in Blaine for- Haystack gypsum member (of nation) l Blaine formation) * fSand Creek formation 1 Hayward sandstone member 1 (of Stillwater formation * Garber sandstone) Stony Hills formation 1 Hennessey shale 1 Stratford formation 1 Hoy sand 1 (subsurface) fTable Mountain sandstone 1 Iconium member (of Wellington Taloga formation 1 formation) * Uncas shale 1 Jester dolomite (in Blaine for­ Verden sandstone 1 member (of mation) 1 Marlow formation) Wanette division 2 Jester sand * (subsurface) Weatherford member (of Cloud t Kingfisher formation 1 Chief formation); (as dolo­ Kiser gypsum member (of Blaine mite *) gypsum) » Whitehorse sandstone * or group Kisner sand 1 (subsurface) Whitney sand * (subsurface) fLone Wolf sandstone l Wildhorse sandstone 1 Lovedale gypsum member (of Wilson sand 1 (subsurface) Blaine formation) J fWoodward group 1 Lowrie sandstone bed (in Well­ Permian(?) ington formation) ! Konawa formation 1 Lucien shale member J (of Garber Newberry sand * (subsurface) sandstone) orman sandstone * McCann sandstone 1 Pennsylvanian or Permian Magpie dolomite member (of Miller sand 1 (subsurface) Blaine gypsum) 1 Nigh sand 1 (subsurface) Mangum dolomite member (of Pennsylvanian and Permian Blaine gypsum) 1 fHominy formation * Marlow formation 1 Ralston group * Mauldin beds 1 (subsurface) Pennsylvanian and Permian(f) Midco (lacustrine) member (of Pontotoc group 1 Wellington formation) 2 Pennsylvanian Minco division 2 fAkins shale member x (of Newkirk limestone 1 Winslow formation) Nicholas sand 1 (subsurface) Atlantic oil sand * (subsurface) fNorman division * Belveal sand * (subsurface) Oklahoma series * Bennett oil sand x (subsurface) Old Crow gypsum * Berwyn conglomerate 1 One Horse gypsum 1 Billings sand * (subsurface) Otoe redbed member (of Welling­ fBristow formation 1 ton formation) 2 Brunner sand * (subsurface) 524 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Oklahoma Continued Oklahoma Continued Pennsylvanian Continued Pennsylvanian Continued Buckhorn asphalt 2 Priddy sand l (subsurface) Bull Creek limestone 1 Prune sand 1 (subsurface) Burgess sand x (subsurface) Quinn sand 1 (subsurface) Campbell sand x (subsurface) Ragan sand 1 (subsurface) Cantrell sand x (subsurface) fRamona formation * Carmichael sand x (subsurface) Ramsey sand x (subsurface) fChandler formation 1 Red Fork sand x (subsurface) Claypool formation 1 Richter sand 1 (subsurface) Cleveland sand 1 (subsurface) Ricketts oil sand x (subsurface) Colbert sand * (subsurface) Ryan sandstone * Cosden sand x (subsurface) fSapulpa group l Covington sand * (subsurface) Shelton sand x (subsurface) Crews sand ' (subsurface) Sholem Alechem limestone 1 (sub­ Dillard sand x (subsurface) surface) Dixie sand 1 (subsurface) Skinner sand x (subsurface) Earlsboro sand 1 (subsurface) Smith sand 1 (subsurface) Endicott sand series > (subsur­ Squirrel sand 1 (subsurface) face) Standpipe sandstone (in Elmdale Flat-top sandstone 1 formation) 1 Gilcrease sand 1 (subsurface) Suitcase sand x (subsurface) fGlenn formation J Surber sand 1 (subsurface) Graham oil sand 1 (subsurface) Sutherland oil sand 1 (subsurface) Grayhorse sand x (subsurface) Swaggart sand * (subsurface) Hallett sand x (subsurface) Swenson sand 1 (subsurface) Hamilton Switch sand x (sub­ Tatums sand x (subsurface) surface) fTiger Creek sandstone member Harjo sand * (subsurface) (of Bristow formation) 1 Healdton sand zone1 (subsurface) Timber Ridge sand x (subsurface) Hewitt sand x (subsurface) Ti Valley series 2 Hickman sand x (subsurface) Tonkawa sand x (subsurface) Holland sand x (subsurface) fTulsa group 1 Hominy lime x (subsurface) Turk sand x (subsurface) Hoover sand series * (subsurface) fVinita formation 1 Hotson sand 1 (subsurface) Walker sand 1 (subsurface) Jackson sand 1 (subsurface) Wayside sand x (subsurface) Johnson oil and gas sand 1 Wheeler lime 1 (subsurface) (subsurface) Wheeler sand 1 (subsurface) Kelso sand x (subsurface) Whiting sand x (subsurface) Ketchum Bluff conglomerate 1 Wigdon sand J (subsurface) Keys sand x (subsurface) Wiser sand 1 (subsurface) Kirk gas sand J (subsurface) Zypsie sand l (subsurface) Layton sand x (subsurface) Pennsylvanian (?) McEwin sand x (subsurface) Blaydes sand l (subsurface) Markham sand » (subsurface) Brown sand l (subsurface) Mervine sand l (subsurface) fGeronimo series l Morris sand x (subsurface) Hogshooter sand l (subsurface) Moyer gas sands * (subsurface) Kagey sand 1 (subsurface) Muskogee lime * (subsurface) Lyons limestone 1 (subsurface) fMusselman sand l (subsurface) Maloney sand x (subsurface) fNelagoney sandstone 1 Meadows sand 1 (subsurface) Nellie gas sand x (subsurface) Pawnee limestone 1 Nemire sand 1 (subsurface) Thomas sand x (subsurface) Newkirk sand * (subsurface) Vann sand x (subsurface) fOchelata member x (of Ramona Pennsylvanian (Virgil) formation) Ada formation 1 fOil City lime * (subsurface) Bird Creek limestone (as mem­ Oscar sandstone 1 ber of Buck Creek formation x) Papoose sand x (subsurface) Boley conglomerate member (of Pawhuska series x (subsurface) Vamoosa formation) 2 Peoples sand 1 (subsurface) Bowhan sandstone member (of Ferryman sand 1 (subsurface) Vamoosa formation); (as mem­ Peru sand x (subsurface) ber of Nelagoney formation L) Ponca sand x (subsurface) fBuck Creek formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 525

United States Continued United States Continued Oklahoma Continued Oklahoma Continued Pennsylvanian (Virgil) Con. Pennsylvanian (Missouri) Con. Cheshewalla sandstone member Checkerboard limestone (as (of Vamoosa formation), (as member of Coffeyville forma­ member of Nelagoney forma­ tion 0 tion !) Clem Creek sandstone tongue Cochahee sandstone member (of Wann formation); (as mem­ (of Vamoosa formation); (as ber of Ochelata formation x) member of Nelagoney forma­ Confederate limestone member tion !) (of Hoxbar formation) 1 Collings Ranch conglomerate 2 fCopan formation 1 fFourmile sandstone member (of Crinerville limestone member (of Nelagoney formation) 1 Hoxbar formation) 1 Grayhorse limestone member Daube member (of Hoxbar (of Vanoss formation); mem­ formation) 1 ber (of Wood Siding formation DeNay limestone member (of in Kansas); (as member of Francis formation) 1 Sand Creek formation x) Dewey limestone 1 Labadie limestone member (of Francis formation * Vamoosa formation); (as mem­ Gap sandstone member (of Tal­ ber of Nelagoney formation x) lant formation); (as member Little Hominy limestone member of Nelagoney formation x) (of Pawhuska limestone) 1 Hay Hollow sandstone lentil fNelagoney formation 1 (of Tallant formation); (as Okay limestone lentil (of Paw­ member of Nelagoney forma­ huska formation) 1 tion J) Pawhuska limestone or forma­ tion 1 Hilltop formation 2 Plummer limestone member (of Hogshooter limestone " Pawhuska formation) 1 Hoxbar formation * Rock Creek limestone (in Nela­ fHulah sandstone member (of goney formation) 1 Nelagoney formation) 1 fStonebreaker limestone mem­ fLost City limestone 1 ber (of Buck Creek formation) 1 Mission sandstone member (of Turkey Run limestone member Tallant formation); (as mem­ (of Pawhuska formation); (as ber of Nelagoney formation) 1 member of Buck Creek forma­ Nellie BIy formation * tion !) Ochelata group (as formation !) Vamoosa formation 1 Okesa sandstone member (of Vanoss formation : Barnsdall formation); (as Wildhorse limestone (in Nela­ member of Ochelata forma­ goney formation) 1 tion i) Wynona sandstone member (of t Panther Creek limestone mem­ Vamoosa formation); (as mem­ ber (of Ochelata formation) 1 ber of Nelagoney formation *) Possum sandstone tongue (of Pennsylvanian (Missouri) Revard sandstone member of Anadarche conglomerate (in Hox- Tallant formation); (as mem­ bar formation) 1 ber of Nelagoney formation J) Anadarche limestone (in Hoxbar Revard sandstone member (of formation) 1 Tallant formation); (as mem­ Anadarche member (of Hoxbar ber of Nelagoney formation x) formation) 1 Seminole conglomerate 1 or for­ Avant limestone member (of mation lola limestone); (as member Skiatook group (as shale x) of Ochelata formation x) Tallant formation 2 Barnsdall formation 2 Belle City limestone 1 Torpedo sandstone (as member Bigheart sandstone member (of of Ochelata formation x) Tallant formation); (as mem­ Union Dairy member (of Hoxbar ber of Nelagoney formation x) formation) 1 Birch Creek limestone member Wann formation l (of Barnsdall formation); (as Westheimer member (of Hoxbar bed in Ochelata formation x) formation) 1 jBuck Point sandstone member Zuckerman limestone member (of (of Nelagoney formation) 1 Hoxbar formation) x 526 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Oklahoma Continued Oklahoma Continued Middle Pennsylvanian Pennsylvanian (Des Moines) Con. Bad Hole sand x (subsurface) Homer limestone member (of Barnett sand l (subsurface) Holdenville shale) 1 Bartlesville sand x (subsurface) Inola limestone member (of Bixier sand x (subsurface) Boggy shale) 1 Booch sand x (subsurface) Jolly limestone member (of Sa­ Boynton sand 1 (subsurface) vanna sandstone) * Burbank sand 1 (subsurface) Eeota sandstone member (of Daggett sand x (subsurface) McAlester formation); (as Butcher sand series x (subsurface) member of Savanna sand­ Fields sand 1 (subsurface) stone x) Glenn sand * (subsurface) Kennison shale member (of Cher­ Independence gas sand 1 (subsur­ okee formation) 1 face) Erebs group 2 Leidecker sand * (subsurface) Lenapah limestone 1 Mounds sand 1 (subsurface) Lequire sandstone member (of Oklan series 2 McAlester formation) 1 Preston sand 1 (subsurface) Little Cabin sandstone member Rhodes sand x (subsurface) (of Cherokee formation) 1 Sapulpa sand x (subsurface) McAlester formation or shale 1 Scott sand l (subsurface) McCurtain shale member (of Squaw sand x (subsurface) McAlester formation) 1 Taneha sand * (subsurface) McNabb limestone (in Senora Tucker sand x (subsurface) formation) 2 Youngstown sand x (subsurface) fNarcissa sandstone (in Cherokee Pennsylvanian (Des Moines) shale) 1 Arnold member (of Deese forma­ Natsy member (of Deese forma­ tion)! tion) 2 Bluejacket sandstone member Nowata shale 1 (of Cherokee shale and of Okmulgee group 1 Boggy shale) 1 Olympic sand member (of Senora Boggy shale ' formation) 2 (subsurface) fBroken Arrow formation 1 Oologah limestone 1 Cabaniss group 2 fPoteau stage 1 Calvin sandstone 1 Pryor Creek shale (in Cherokee Cameron sandstone member (of shale) 1 McAlester shale) 1 Rocky Point conglomerate (in fCavanal group * Deese formation) 2 Chelsea sandstone member (of Russell Creek limestone member Senora formation); (as lentil of (of Senora formation) 2 Cherokee formation l) Sam Creek limestone member (of tClaremore formation 1 Savanna sandstone) 1 Craig shale 1 Sasakwa limestone member (of Crekola sandstone member (of Holdenville shale) 1 Boggy shale) 1 Savanna sandstone 1 or formation fCurl formation Senora formation 1 Deese formation 1 Spaniard limestone member (of Devils Kitchen member (of Deese Savanna sandstone) 1 formation) l fSpiro sandstone member (of Doneley limestone member (of Savanna formation) l Savanna formation) 2 Stuart shale * Drywood formation or coal Taft sandstone member (of Boggy cycle 2 (see p. 622) shale) 1 Eleventh Street limestone 2 Tamaha sandstone member (of Elm Creek limestone (in Chero­ McAlester formation); (as kee shale) 1 member of Savanna sand­ fEnterprise sandstone (in Boggy stone) * shale) 1 Thurman sandstone l t Franks conglomerate 1 Tiawah lime 1 Hartshorne sandstone l fTobucksy sandstone 1 Holdenville shale 1 Verdigris limestone x (member of Hollis limestone member (of Senora formation); (as lime­ Deese formation) 2 stone in Cherokee formation) 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 527

United States Continued United States Continued Oklahoma Continued Oklahoma Continued Pennsylvanian (Des Moines) Con. Pennsylvanian (Morrow) Con. Warner sandstone member (of City Lake sandstone member (of McAlester formation) 1 Springer formation) 1 Wetumka shale 1 Goddard shale member (of Wewoka formation l Springer formation) 2 Wilburton group 1 Jackfork sandstone 1 Williams member (of Deese for­ Johns Valley shale ' mation) 2 Lake Ardmore sandstone member Wimer School limestone member (of Springer formation) 1 (of Labette shale) 2 Limestone Gap shale 2 Pennsylvanian (Atoka) Overbrook sandstone member (of Atoka formation * or series Springer formation) l Blackjack School sandstone Primrose sandstone member (of member (of Atoka formation) 1 Springer formation) l Chickachoc chert (as lentil of Rod Club sandstone member (of Atoka formation) * Springer formation) 1 fCoata sandstone member (of Round Prairie formation 2 Atoka formation) 1 Springer formation 1 or shale Goody sandstone member (of Stapp conglomerate member (of Atoka formation) 1 Union Valley formation) 2 Dirty Creek sandstone member Target limestone member (of (of Atoka formation) l Springer formation) 2 Dornick Hills formation 1 (may be Wapanucka limestone 1 Morrow in part) Mississippian and Pennsylvanian Georges Fork sandstone member Stanley shale 1 (of Atoka formation) l Mississippian Moore formation 2 (subsurface) Ingraham gas sand 1 (subsurface) Muskogee sand 1 (subsurface) Jefferson gas sand 1 (subsurface) Pope Chapel sandstone member Lincolnville chert (in Boone (of Atoka formation) 1 limestone) 1 Webbers Falls sandstone mem­ Mayes formation 1 ber (of Atoka formation) 1 Prairie Hollow member (of Prairie Lower Pennsylvanian Mountain formation) 2 Ardian series 2 Quapaw chert 1 Big Branch formation 1 t Smithville chert lentil (in Stan­ Bostwick member (of Dornick ley shale) J Hills formation) 1 Tuskahoma siliceous shale mem­ Chickasaw Creek formation 2 ber (of Stanley formation) 2 Cromwell sand x (subsurface) Welden limestone 1 Frensley limestone 2 Jolliff limestone member (of Upper Mississippian or Lower Dornick Hills formation) l Pennsylvanian Lester limestone member (of Deaner sand 1 (subsurface) Dornick Hills formation) l Kingwood sand 1 (subsurface) Markham Mill formation 2 Lyons sand x (subsurface) Moyers formation 2 Upper Mississippian t Muskogee group 1 Albion formation 2 Otterville limestone member (of Caney shale 1 Dornick Hills formation) 1 Grand River limestone 2 Prairie Mountain formation 2 Lower Mississippian Pumpkin Creek limestone member Misener sand J (subsurface) (of Dornick Hills formation) 1 Sycamore limestone 1 Pushmataha series 2 Devonian and Mississippian Sykes sand 1 (subsurface) Woodford chert ' or shale Tenmile Creek formation 2 Devonian (f) Union Valley sandstone member Marland sand 1 (subsurface) (of Wapanucka formation) 1 Mollie Miller sand x (subsurface) Wesley formation 2 Middle Devonian Wildhorse Mountain formation 2 fBrushy Creek chert 1 Pennsylvanian (Morrow) Lower or Middle Devonian Barnett Hill formation 2 Pinetop chert 1 sandstone (in Sallisaw formation (as sand­ Springer formation) 1 stone x) 528 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Oklahoma Contin ued Oklahoma Continued Lower Devonian Middle Ordovician Continued Bois d'Arc limestone l Simpson group 1 Cravatt formation 2 Tulip Creek formation 1 Frisco limestone ' West Spring Creek formation 1 Haragan shale l or limestone Lower or Middle Ordovician Kite group 2 Burgen sandstone 1 Silurian and Devonian Lower and Middle(?) Ordovician Hunton limestone 1 or group fStringtown shale 1 Silurian Lower Ordovician Chimneyhill limestone 1 Burgen limestone 1 Henryhouse shale ' or limestone Chapman Ranch formation l Sallisaw marble 1 Falls formation 1 Lower Silurian fFalls Creek formation 1 Cochrane limestone member (of Joins Ranch formation 1 Chimneyhill formation) 2 Eindblade formation 2 Dillard limestone member (of McKenzie Hill limestone 1 or Chimneyhill formation) 2 formation Hawkins limestone member (of McMichel member (of McKenzie Chimneyhill formation) 2 Hill formation) 2 Keel limestone member (of Chim­ neyhill formation) 2 fNebo J (formation) Ordovician, Silurian, and Devonian Rainy Mountain limestone 1 fTalihina chert 1 Strange formation 2 Ordovician Lower (?) Ordovician Ada limestone 2 Hominy sand * (subsurface) Alden limestone 1 Cambrian Cool Creek formation l Blue Creek series > Detrick sand 1 (subsurface) Blue Creek Canyon group 2 Dunlap sand l (subsurface) Cambrian(?) Fite limestone 1 Lukfata sandstone formation 2 Hammar-Haindl limestone 1 (sub­ Upper Cambrian and Lower Ordo­ surface) vician Hoopes sand > (subsurface) Arbuckle limestone l or group l Irish sand 1 (subsurface) Turkey Mountain lime x (sub­ Johnson sand l (subsurface) surface) Kinter sand J (subsurface) Upper Cambrian Lowery sand 1 (subsurface) Marshall green-shale zone 1 (sub­ Butterly dolomite 2 surface) Fort Sill limestone (as forma­ Mollman sand l (subsurface) tion i) Mose Carr sand 1 (subsurface) Honey Creek formation (as lime­ Olds sand 1 (subsurface) stone x) Patterson Ranch group 2 Reagan sandstone ' Pugh sand 1 (subsurface) Royer marble 1 School Land sandstone 1 (sub­ Signal Mountain formation l surface) Timbered Hills group 1 Seminole sand member (of Simp- Precambrian son formation) * Carlton granophyre 1 Simons sand 1 (subsurface) Carlton porphyry ' Stamper zone 1 (subsurface) Colbert porphyry 1 Webster formation 1 Cold Springs granite * Wilcox sand 1 (subsurface) Davidson granophyre 1 Wolf Creek dolomite 1 Headquarters granite * Upper Ordovician Lugert granite 1 Sylvan shale 1 Meers quartzite 1 Middle and Upper Ordovician Quanah granite l Tyner formation l Raggedy Mountain gabbro 1 Viola limestone 1 Reformatory granite 1 Middle Ordovician Saddle Mountain porphyry ' Bromide formation 1 Tepee Creek formation 2 Criner formation 1 Tishomingo granite 1 Joins formation 1 Troy granite 1 McLish formation 1 Precambrian(f) Oil Creek formation 1 Spavinaw granite 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 529

United States Continued United States Continued Oregon Oregon Continued Quaternary Pliocene(f) Wineglass welded tuff 2 Empire formation 1 Recent Harney formation 1 Alkali formation > Pliocene, upper, or Pleistocene, lower Malheur formation 1 Boring agglomerate 2 Summer formation 1 Boring lava 2 Recent(?) Portland Hills silt member (of Crooked River formation 1 Troutdale formation) 2 Pleistocene Pliocene, middle Cascades formation 1 Port Orford formation 8 Cascan formation 2 Steens basalt 1 Chewaucan formation J Pliocene, lower Clackamas gravels 2 Alvord Creek formation (as Coquille formation 2 beds i) Fossil Lake formation 1 Pike Creek volcanic series 1 Herman Creek lava 1 volcanic series Lacomb gravels 2 (as andesitic series *) Leffler gravels 2 Miocene and Pliocene(f) Linn gravels 2 Grassy Mountain basalt 1 Llano de Oro formation 1 Miocene and Oligocene(?) Newport formation 1 t Oregon beds * Olallie lavas 2 Miocene Portland delta gravels 1 fAstoria group 1 Rocky Butte volcanics 2 fAstoria sandstone 1 Santiam basalts 2 Blackjack basalt 1 Tualatin terrace gravels 2 fCape Blanco beds 1 Wildhorse formation * basalt 1 Willamette silt 2 Coriba formation 1 Pleistocene, upper, or Recent Cottonwood beds 1 Diamond formation 1 Glass Buttes series 1 Pleistocene, upper Owyhee basalt 1 beds ' Sardine series 2 Tertiary Stayton lavas 1 Dorena welded tuff 2 Willamette group 1 Tertiary, upper, and Pleistocene Miocene(?) Arlington lake beds 1 Dooley rhyolite breccia 1 Shutler formation ' Miocene, upper, or Pliocene Tertiary, upper Hood River conglomerate 1 Black Crater formation 1 Miocene, upper Little Alvord Creek rhyolite J Mascall formation 1 Tertiary, upper(f) Miocene, middle or upper Fern Ridge tuffs 1 Halls diorite porphyry 2 Pliocene and Pleistocene Rhododendron formation 1 Battle Ax basalts 2 Miocene, middle basalts 2 Astoria formation (as shale x) Mount Hood lavas 2 Trout Creek formation 1 Rattlesnake formation 1 Miocene, lower Pliocene Alvord formation 1 Coos conglomerate ' Nye mudstone (as shale x) Dalles formation 1 Oligocene and Miocene(f) Danforth formation 1 Cascadia formation 1 jDeschutes formation 1 Oligocene Ironside beds 1 Eugene formation 1 Madras formation 1 Illaho formation 1 Molalla formation 2 Mehama volcanics 1 formation 1 t Oakland limestone 1 Outerson basalts 2 Pittsburg Bluff formation (as fPelton basalt member (of Des- sandstone x) chutes formation) 1 Oligocene to Eocene(?) Silver Lake group 1 Breitenbush series 2 Steens Mountain formation * Oligocene, upper, or Miocene, lower Troutdale formation 1 Bridge Creek shale 1 Underwood Mountain lava 2 Butte Creek beds 2 Yakima group 1 fWarrendale formation x 530 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Oregon Continued Oregon Continued Oligocene, upper, to Miocene, lower Lower Cretaceous Scio beds 2 fDillard series 1 Oligocene, upper Whitsett limestone lentils (in Rocky Point beds 2 Myrtle formation) 1 Scappoose formation 2 Pre-Cretaceous Yaquina sandstone (as forma­ Colebrooke schist 1 tion i) Upper Jurassic and Lower Cretaceous Oligocene, middle and upper, and Myrtle group (as formation >) Miocene Jurassic(f) John Day formation 1 Craggy gneiss 1 Oligocene, middle Upper Jurassic Tunnel Point sandstone ( Dothan formation' beds x) Galice formation 1 Eocene Rogue formation 2 Arago group l Trowbridge shale 2 Clarno formation l Upper Jurassic(?) Comstock formation 2 Lonesome formation 2 Helmick formation 2 Middle Jurassic Lorane shale member (of Spencer Colpitts group 2 formation) 2 Hyde formation 2 fPulaski formation 1 Izee group 2 Spencer formation 1 Snowshoe formation 2 Tillamook volcanic series 2 Warm Springs formation 2 Tyee sandstone 1 or formation Weberg formation 2 Wilbur tuff lentils l Lower Jurassic Yamhill formation 2 formation 2 Eocene (?) Mowich group 2 Coyote formation 1 Nicely shale 2 Trail Crossing basalt 1 Robertson formation 2 Wagontire formation 1 Silvies River beds 1 Eocene, upper, to Miocene, lower Suplee formation 2 Western Cascade volcanic series 2 Post-Triassic (pre-Tertiary) Eocene, upper, and Oligocene, lower Haines granite 1 Bastendorff shale (as Bassendorf Triassic(?) shale *) Applegate group 2 Calapooya formation 1 Huntington series 1 Fisher formation 1 Upper Triassic Keasey shale 1 or formation fEagle Creek formation l Nehalem formation 2 Hurwal formation 2 Toledo formation 1 Martin Bridge formation 1 Eocene, upper Permian Coaledo formation 1 Clover Creek greenstone 1 Goble volcanic series 2 Coyote Butte formation 2 Moody shale member (of Toledo Pre- Carboniferous (?) formation) 1 Burnt River schist 1 Nestucca formation 2 Pennsylvania^, Eocene, middle Spotted Ridge formation 2 Burpee formation 1 Pennsylvanian (?) Coffin Butte volcanics 2 Elkhorn Ridge argillite 2 Eocene, lower Mississippian Kings Valley siltstone member Coflfee Creek formation l (of Siletz River volcanic series) 2 Devonian(?) Siletz River volcanic series 2 May Creek formation 1 or schist Umpqua formation 1 Precambrian Mesozoic or older Bald Mountain gneiss J Pueblo formation l Pennsylvania Cretaceous Pleistocene Henley beds 1 Allegany drift 1 Phoenix beds 1 Big Bend gravel 1 Rogue River group 1 Clarendon gravel 1 Upper Cretaceous Conewango clay 1 Hornbrook formation 2 Indian Hollow sands 1 INDEX TO THE GEOLOGIC NAMEiS OP NORTH AMERICA 531

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Pleistocene Continued Permian -Contin ued deposits * Claysville limestone member (of Philadelphia brick clay 1 Greene formation) l Philadelphia red gravel 1 Colvin limestone member (of University gravel 1 Washington formation) l Pleistocene (Illinoian) Davistown sandstone 2 Carmichaels formation 1 Donley limstone member (of fPacker clay * Greene formation) a Tertiary(f) l Mont Alto lignite l Dunlap sandstone 2 Pliocene(f) Fish Creek sandstone member Branchtown clay * (of Greene formation) 1 Bryn Mawr gravel l Franklin limestone (in Washing­ Triassic ton formation) 1 Robeson conglomerate * Gilmore sandstone member (of South Valley limestone 1 Greene formation) a Triassic(f) Greene formation 1 Spitzenberg conglomerate 1 Jackson limestone (in Greene Upper Triassic formation) 1 Arendtsville fanglomerate lentil Jollytown limestone member (of (in Gettysburg shale) 1 Washington formation) l Brunswick conglomerate * Jollytown sandstone (in Wash­ Conewago conglomerate member ington formation) 1 (of Gettysburg shale) (G. W. Lower Washington limestone Stose and A. I. Jonas, 1939, member (of Washington for­ Penn. Geol. Survey Bull. C-67, mation) 1 p. 107, 115, 118) Martinsburg limestone (in Wash­ Conewago group 1 ington formation) a Elizabeth Furnace conglomerate Middle Washington limestone member (of Gettysburg shale) 1 member (of Washington for­ Gettysburg shale * mation) l Graters member (of Brunswick Mount Morris limestone member formation) 1 (of Washington formation) l fGwynedd shale 1 Nineveh limestone member (of Heidlersburg sandstone member Greene formation) 1 (of Gettysburg shale) 1 Nineveh sandstone member (of Lansdale shale 1 Greene formation) 1 fLewisburg group 1 Prosperity limestone member (of t Lisbon group l Greene formation) 1 Manchester group 1 Rogersville limestone (in Greene New Oxford formation 1 formation) 1 Norristown sandstone a Taylor sandstone )in Greene fNorristown shale l formation) 1 Perkasie shale 1 member (of Taylortown limestone (in Wash­ Brunswick formation) ington formation) a fPhoenixville shale 1 Tenmile limestone (in Greene Pottstown shale 1 formation) 1 Santatoga member (of Brunswick Upper Washington limestone formation) 1 member (of Washington for­ Smith Corner member (of Locka- mation) 1 tong formation) 2 Washington formation 1 Paleozoic Washington sandstone member tAppalachian group or series 1 (of Washington formation) a Lower Paleozoic(f) Waynesburg sandstone member Marburg schist* (of Washington formation) 1 Peters Creek quartzite (as Windy Gap limestone member schist a) (of Greene formation) 1 Wissahickon schist 1 or forma­ Woodglen limestone 2 tion 1 Carboniferous (see also Devonian or Permian (see also Pennsylvanian Carboniferous) and Permian) Broad Top series a Blacksville limestone (in Wash­ Pennsylvanian and Permian ington formation) 1 fGreene County group 1 Brier Hill sandstone * f coal series 1 804835 59 9 532 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Pennsylvanian Pennsylvanian Continued Alto coal group (in Pottsville fFreeport coal group (in Alle­ formation) 1 gheny formation) l Bakerstown sandstone (in Cone- fFreeport limestone member (of maugh formation) 1 Allegheny formation) 1 Barton group (in Conemaugh Freeport sandstone member (of formation) 1 Allegheny formation) * formation l Gallitzin limestone (in Cone­ Berlin group (in Conemaugh maugh formation) 1 formation) 1 fGarland conglomerate (in Potts­ fBerlin limestone (in Conemaugh ville formation) * formation) * Gourd Head Run clay (in Cone­ Big Dunkard sand 1 (subsurface) maugh formation) 1 Blue Ball fire clay (in Allegheny Gourdhead Run limestone (in formation) 1 Conemaugh formation) 1 Bolivar sandstone (in Allegheny Grafton formation l formation) 1 Grafton member (of Conemaugh Brookville clay (in Allegheny formation) 1 formation) 1 fGreat Bend conglomerate 1 fBrowntown sandstone (in Mo- Gurnee formation (in Pottsville nongahela formation) 1 formation) 1 Brush Creek clay or fire clay (in Harshberger limestone (in Cone­ Conemaugh formation) 1 maugh formation) l Brush Creek red bed (in Cone­ Hillman limestone * maugh formation) ' Hurry-up sand l (subsurface) Brush Creek sandstone (in Cone­ Indian sand * (subsurface) maugh formation) 1 fJohnson Run sandstone (in Buffalo formation (in Conemaugh Pottsville formation ) * formation) * Johnstown iron ore (in Cone­ Buffalo shale (in Conemaugh maugh formation) 1 formation) l Kane limestone (in Allegheny Campbells Ledge black slate (in formation) 1 Pottsville formation) 1 fKinzua Creek sandstone (in Canal limestone 1 Pottsville formation) * Church Run conglomerate * Kittanning coal group (in Alle­ Clarion clay (in Allegheny for­ gheny formation) * mation) 1 Kittanning fire clay (in Alle­ t Clarion coal group (in Allegheny gheny formation) 1 formation) l Kittanning shale (in Allegheny Clermont group (in Allegheny formation) 1 formation) * fLigonier sandstone l Clermont limestone (in Allegheny Little Dunkard sand J (subsur­ formation) * face) Coleman limestone (in Cone­ fLittle Pittsburg limestone (in maugh formation) * Conemaugh formation) J fColorado conglomerate l Little Pittsburg member (in Connellsville member (of Cone­ Conemaugh formation) * maugh formation) 1 f Lower Freeport clay (in Alle­ Connellsville red bed (in Cone­ gheny formation) > maugh formation) 1 f Lower Freeport limestone mem­ Darlington underclay (in Alle­ ber (of Allegheny formation) l gheny formation) 1 fLower Freeport sandstone (in Dunkard sand 1 (subsurface) Allegheny formation) l Duquesne limestone (in Cone­ fLower Kittanning limestone (in maugh formation) 1 Allegheny formation) * fEbensburg sandstone member Lower Mercer fire clay (in Potts­ (of Conemaugh formation) l ville formation) * Elk Lick clay 1 Lower Mercer iron shales (in Fagundas conglomerate l Pottsville formation) * Fishpot limestone member (of fLower Mercer limestone (in Monongahela formation) 1 Pottsville formation) l Foys limestone (in Allegheny fLykens series * formation) 1 Mahoning fire clay (in Cone­ Freeport clay l maugh formation) * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 533

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Pennsylvanian Continued Pennsylvanian Continued Mahoning formation J fSewickley limestone (in Monon- Mahoning limestone (in Cone- gahela formation) 1 maugh formation) 1 Sewickley member (in Monon- Mahoning red bed (in Cone- gahela formation) * maugh formation) > Shinersville conglomerate (in Marshburg slates or shale (in Pottsville formation) 1 Pottsville formation) 1 fSummit limestone (in Cone­ maugh formation) 1 Meadville monothem or stage 1 fSummit series (in Allegheny Mercer limestone (in Pottsville formation) 1 formation) 1 fTionesta group (in Pottsville Meyersdale red shale (of Cone- formation) 1 maugh formation) l Tionesta iron shales (in Pottsville Middle Kittanning clay (in Alle­ formation) 1 gheny formation) * fTionesta sandstone (in Potts­ f Middle Mahoning sandstone (in ville formation) ' Conemaugh formation) * Tionesta series * t Middle Mercer shales (in Potts­ Triumph conglomerate l ville formation) 1 Uniontown member (of Monon- Mill Creek limestone 1 gahela formation) 1 Morgantown member (of Cone­ t Upper Freeport clay (in Alle­ maugh formation) 1 gheny formation) 1 Murphy sand * (subsurface) t Upper Freeport limestone mem­ New Galilee clay shale (in Cone­ ber (of Allegheny formation) 1 maugh formation) 1 fUpper Kittanning limestone (in Niverton shale (in Conemaugh Allegheny formation) * formation) 1 fUpper Mahoning sandstone (in Philson limestone (in Conemaugh Conemaugh formation) l formation) 1 Upper Mercer iron shales (in fPine Creek limestone member Pottsville formation) * (of Conemaugh formation) 1 t Upper Mercer limestone (in fPine Creek sandstone (in Alle­ Pottsville formation) * gheny formation) 1 f Washington reds (in Conemaugh fPittsburgh limestone (in Cone­ formation) l maugh formation) 1 Waynesburg clay J member (in Monon- Waynesburg member (in Monon- gahela formation) J gahela formation) l Pittsburgh red beds, red shale, or Wehbum flint clay l Reds (in Conemaugh forma­ Wellersburg clay (in Conemaugh tion) » formation) 1 Pittsburgh (Lower) sandstone (in Woods Run limestone (in Cone­ Conemaugh formation) * maugh formation) 1 fPittsburgh series * Wurtemburg limestone (in Potts­ Powelton shale (in Allegheny ville formation) J formation) J Wurtemburg sandstone (in Potts­ Quakertown fire clay (in Potts­ ville formation) * ville formation) 1 Wyoming Valley limestone beds 1 tQuakertown group (in Pottsville formation) 1 Upper Pennsylvanian Quakertown shale (in Pottsville shale member (of formation) 1 Conemaugh formation) 1 Redstone member (of Monon- Brush Creek limestone member gahela formation) 1 (of Conemaugh formation) 1; Saltsburg formation (in Cone­ shale member in Ohio maugh formation) l Buffalo sandstone member (of Saltsburg member (of Monon- Conemaugh formation) 1 gahela formation) 1 Bulger limestone bed (in Monon- Schenley red beds (in Conemaugh gahela formation) l formation) l Conemaugh formation 1 Scranton sandstone (in Pottsville Connellsville sandstone member formation) > (of Conemaugh formation) 1 Scrubgrass fire clay (in Allegheny Dinsmore limestone bed (in formation) l Monongahela formation) : 534 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Pennsy Iv ania Continued Pennsylvania Continued Upper Pennsiilvanian Continued Lower Pennsylvanian Continued Elk Lick limestone member (of Sharon conglomerate member Conemaugh formation) l (of Pottsville formation) 1 Lower Pittsburgh limestone Sharon shale member (of Potts­ member (of Conemaugh for­ ville formation) * mation) 1 Mississippian and Pennsylvanian Mahoning sandstone member (of f coal series l Conemaugh formation) l fShenango series * Monongahela formation l Mississippian (see also Devonian Pittsburgh sandstone member or Mississippian; Upper De­ (of Monongahela formation) 1 vonian and Mississippian; and Bedstone limestone member (of Upper Devonian or Missis­ Monongahela formation) 1 sippian) Saltsburg sandstone member (of t Allegheny group 1 Conemaugh formation) 1 Bartholomew siltstone member Sewickley sandstone member (of Orangeville shale) J (of Monongahela formation) 1 Benezette limestone member (of Summerhill sandstone member ) 1 (of Conemaugh formation) 1 Big Injun group l (subsurface) Uniontown limestone member Bitter Rock sand 1 (subsurface) (of Monongahela formation) 1 Burgoon group 1 Uniontown sandstone member Burgoon sandstone member (of (of Monongahela formation) l Pocono formation) 1 Upper Pittsburgh limestone mem­ ber (of Conemaugh formation) J Byham limestone member * Waynesburg limestone member Cameron red shale member l (of Monongahela formation) 1 Carl sandstone member (ofShe- Wilmore sandstone member (of nango formation) 2 Conemaugh formation) 1 fConneaut limestone member 1 Middle Pennsylvanian Corry sandstone 1 Allegheny formation 1 Crawford series or subseries * Bolivar fire clay (in Allegheny 1 formation) 1 Cussewago stage or monothem 1 Butler sandstone member (of Custards shale member (of Mead- Allegheny formation) 1 ville stage) 1 Clarion sandstone member (of French Creek limestone member Allegheny formation) 1 (of Meadville stage) J Homewood sandstone member Griswold conglomerate (in Po­ (of Pottsville formation) 1 cono formation) J Johnstown limestone member Harvest Home shale member * (of Allegheny formation) 1 (of Meadville stage) Eittanning sandstone member (of Hempfield shale member a (of Allegheny formation) l Shenango monothem) Llanfair sandstone member (of Hosmer sand l (subsurface) Allegheny formation) l Hungry Run sandstone member Lower Clarion clay (in Allegheny (of Orangeville shale) 2 formation) l Johnsonburg sandstone 1 Lower Kittanning clay (in Alle­ Loyalhanna limestone l ; lime­ gheny formation) 1 stone member (of Greenbrier Mercer shale member (of Potts­ limestone) in Maryland and ville formation) 1 West Virginia Upper Clarion clay (in Allegheny Mauch Chunk shale 1 or forma­ formation) l tion Upper Kittanning clay 1 fMeadville group l Vanport limestone member (of Meadville shale member (of Allegheny formation) 1 Cuyahoga formation) * Worthington sandstone member Mount Morris sand * (subsur­ (of Allegheny formation) x face) Lower and Middle Pennsylvanian Murdockville sand l (subsurface) Pottsville formation or group 1 Murrysville sand 1 (subsurface) Lower Pennsylvanian Orangeville shale member (of Connoquenessing sandstone Cuyahoga formation) '; shale member (of Pottsville in Ohio formation) l Papoose sand l (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 535

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Mississippian Continued Devonian or Carboniferous Con. Patton shale member (of Pocono East Kane shale member 1 formation) 1 Elkland parvafacies 1 Peters Mountain sandstone (in f Glade sandstone 1 Pocono formation) > Gordon sand l (subsurface) fPithole grit 1 Hayfield limestone 1 Pocono formation, group ' or Hay field shale l sandstone Hickory sand 1 (subsurface) Riddlesburg shale member (of Hosmer conglomerate * Pocono formation) 1 Kushequa shale member l Roaring Branch sandstone (in Littles Corner limestone mem­ Pocono formation) * ber 1 (of Hayfield shale) Roaring Branch shales (in Pocono fLudlow conglomerate member * formation) l (of Knapp formation) Salvation sand 1 (subsurface) Millers sandstone 1 Schreyfogels limestone 1 Millers Cliff conglomerate J Sharpsville formational suite * Potter parvafacies 1 Sharpsville sandstone member fRidgway shale member 1 (of (of Cuyahoga formation) 1 ; Knapp formation) sandstone in Ohio Roystone coquinite member l Shaws sandstone member 1 Saegerstown shale 1 Shellhammer Hollow formation 2 Shannopin sand l (subsurface) fShenango group l Smethport magnafacies 1 Shenango sandstone * fSmethport shale member (of Shenango shale * Knapp formation) J Slippery Rock sand * (subsur­ face) Snee sand 1 (subsurface) Smiths Ferry sand l (subsurface) Stony Lonesome bed 1 Squaw sand l (subsurface) Tanners Hill quarry rock (in Thorn Creek gas sand > (subsur­ Conewango formation) * face) fTanners Hill red (in Conewango Trough Creek limestone member formation) 1 (of ) J Tidioute shale member l West Mead limestone member 1 Tioga magnafacies l Lower Mississippian fTunangwant conglomerate 1 Venango group, 1 stage, 1 or mono- Chestnut Ridge sandstone 2 them l Cove Mountain member (of Pocono formation) 2 fWatson sandstone member l Hopwood conglomerate * (of Cattaraugus formation) Lick Run conglomerate 2 Wetmore conglomerate member l Linderman sandstone * Woodcock sandstone l Pine Knob sandstone 2 Wrightsville conglomerate 1 Second Mountain member (of Devonian or Mississippian Pocono formation) 2 Gantz sand l (subsurface) Mississippian and Devonian(f) Marvin Creek limestone l fCrawford shale 1 Pine Run sand 1 (subsurface) Oil Lake group > Devonian (see also Silurian and Devonian or Carboniferous Devonian) Amity shale 1 Brodhead member (of Marcellus Armenia limestone lentil (of formation) 2 Oswayo formation) * Buttermilk Falls limestone 2 Bimber Run conglomerate mem­ Campbell Run sand l (subsurface) ber » Elk sand group 1 (subsurface) Blue Monday sand 1 (subsurface) Hanley sandstone (in Cattarau­ Boulder sand l (subsurface) gus formation) 2 Buchanan Hill conglomerate 1 Juniata coal measures l Clintonville oil sand 1 (subsur­ Juniata River series 1 face) Lytle sand 2 Cobham conglomerate member 1 Queen sand 1 (subsurface) Columbia Hill oil rock * (subsur­ Red Valley sand l (subsurface) face) Tiona sand l (subsurface) Conewango formation 1 Devonian(f) Cussewago shales 1 Edensburg oil sandstone 1 (sub­ Dutchmans conglomerate lens l surface) 536 GEOLOGIC NAMES OP NORTH AMERICA

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Upper Devonian and Mississippian Upper Devonian Continued Oil Creek Lake group * Drinker Creek sandstone member Upper Devonian or Mississippian (of Lanesboro formational Cherry Ridge conglomerate 1 suite) 2 Cherry Ridge group 1 Elizabeth sand 1 (subsurface) Cherry Ridge limestone 1 Fall Creek conglomerate lentil Cherry Ridge red shale 1 (of Chemung formation) * Cherry Ridge sandstone * Flatiron coquinite member (of Cherry Ridge shales 1 Riceville formation) 2 Cleveland magnafacies 1 Flat Run sand l (subsurface) Coudersport member (of Cat- Fort Littleton formation 1 taraugus formation) 1 Franklindale limestone lentil (of tDevils Den sandstone 1 Chemung formation) * Dyberry glomerate * Garfield sand * (subsurface) Elk Mountain sandstone 1 Garland sand > (subsurface) Elk Mountain transition group 1 Gartland oil sand l (subsurface) LeBoeuf conglomerate > Germania formation 2 North Warren shale member * Girard shale member (of Che­ Pimple Hill conglomerate 1 mung formation) 1 fWild Cat coquinite 1 Glade sand 1 (subsurface) Upper Devonian Great Bend limestone (in Che­ Allegheny sand l (subsurface) mung formation) 1 Allegrippis sandstone member Hague gas sand l (subsurface) (of Chemung formation) * 1 Analomink red shale * Harrisburg Run sand > (sub­ Atwell sand * (subsurface) surface) Balltown oil sand 1 (subsurface) Haskell sand 1 (subsurface) Barrett sand 1 (subsurface) Hauns Bridge group * Bayard sand * (subsurface) Honesdale sandstone group (in Beatty sand 1 (subsurface) Catskill formation) l Big Bend facies and magnafacies 1 Howard Quarry sandstone 2 Blossburg formation 1 Irvineton parvafacies 1 Blue Jay oil sand 1 (subsurface) Jumonville sandstone 2 Bradford oil sand group l (sub­ Kane sand 1 (subsurface) surface) Kingsley red shale member (of Brallier shale 1 New Milford formation) * Brandt sandstone (in Kingsley Kings Mill sandstone J member of Wellsburg mono- Kings Mill shales 1 them) 2 Lackawaxen conglomerate 1 Brodhead Creek member (of Lanesboro member (of New Tully formation) 2 Milford formation) l Burket black shale member (of Lehighton member (of Tully for­ Harrell shale) 1 mation) 2 fBurlington limestone (in Che­ Lewis Run sand l (subsurface) mung formation) 1 Losh Run shale 1 fCascade sandstone (in Che­ Luthers Mills coquinite l mung sandstone) l McDonald sand 1 (subsurface) Cascade Creek sandstone (in McKean group J (subsurface) Chemung formation) 1 Mansfield red beds (in Chemung Catawissa reds 1 formation) l Chagrin magnafacies J Maple Summit sandstone 2 Cherry Grove sand 1 (subsur­ Montrose red shale (in Catskill face) formation) > Clarendon sand l (subsurface) Montrose sandstone 1 Conneaut group * Moosic 1 (formation) Cooper sand 1 (subsurface) Mount Pleasant conglomerate l Cotton formation 2 Crandall Hill sand 1 (subsurface) Mount Pleasant red shale (in Damascus red shale l Catskill formation) * Darling oil sand l (subsurface) New Milford group (in Catskill Deer Lick sand 1 (subsurface) formation) 1 Delaware flags 1 Newport limestone 1 Delaware River Newport shales and sandstones l Dellville sandstone 1 Nineveh 1 (sand) (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 537

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued L/pper Devonian Continued Middle Devonian Continued Owego shale member (of Cayuta Mahanoy black shale member * monothem) 2 (of ) Paupack sandstone (in Catskill * formation) l Mexico sandstone member 1 (of Paupack shales (in Catskill for­ Marcellus formation) mation) * Montebello sandstone (in Hamil­ Piney Ridge sandstone member ton formation) l (of Chemung formation) l 2 Porter sand l (subsurface) Palmerton sandstone 2 Riceville shale (as member of Perry formation l Chemung formation1) Peru limestone l Rocky Run conglomerate 1 Rockville member (of Skaneateles Roulet conglomerate * formation) 1 Rush formation 1 Selingsgrove lower limestone l Rush member (of Tully lime­ Selingsgrove lower sandstone l stone) 1 Selingsgrove upper limestone l Saxton conglomerate member (of ' Selingsgrove upper sandstone * Chemung formation) * Shamokin black shale member l Saxton shale (in Catskill forma­ (of Marcellus formation) tion) i Turkey Ridge sandstone mem­ Sheffield gas or oil sand * (sub­ ber 1 (of Marcellus formation) surface) Lower or Middle Devonian Shohola formation l Peru sandstone l Skinners Eddy limestone (in Lower Devonian Catskill formation) > Clarks Mill beds » Sliverville sand 2 (subsurface) Fallings Springs sandstone mem­ Smethport oil sand 1 (subsurface) ber (of New Scotland forma­ Speechley sand l (subsurface) tion) 2 Starrucca sandstone l Licking Creek limestone 2 Starrucca shale (in Catskill or Mandata formation 2 Chemung formation) l Milesburg formation 1 Stoneham oil sand l (subsurface) fSelingsgrove shale 1 Stony Brook beds (in Chemung Stormville conglomerate 1 formation) ' Stormville hydraulic cement bed fsub-Blairsville red shale member or water lime 1 (of Chemung formation) l Stormville limestone 1 Sugar Run sand * (subsurface) Stormville sandstone 1 Susquehanna series l Stormville shale 1 fTowanda sandstone (in Silurian and Devonian Chemung formation) l Lewistown limestone 1 Trimmers Rock sandstone * Silurian Venago formation 1 Aquashicola formation l Warren oil sand group l Barree limestone * Watering Trough shale ' Barree shales 1 Weissport member (of Tully for­ Bridgeport sandstone (in Wills mation) 2 Creek shale) 1 Windfall sand 1 (subsurface) Croasdale quartzite 1 Youghioheny sandstone 2 fHoward sandstone member (of Middle Devonian ) 1 Beaver Dam black shale member Landisburg sandstone 1 (of Needmore shale) 2 Logan limestone l Bowmanstown chert z Logan shale l Lost Creek limestone * Chaneysville sandstone member 1 McCoytown sandstone l (of Manhantango formation) Mifflintown limestone 1 Fort Hunter sandstone member Poxino Island limestone (in Wills (of Manhantango formation) 2 Creek shale) 1 Frame shale member (in Hamil­ Redstone Ridge group 1 ton group) 1 Silurian(f) Gander Run shale member (in Inwood sandstone 1 ) 1 Upper Silurian Knobsville continental beds 1 Bloomfield sandstone l Ludlow sandstone l Bloomsburg red beds 1 538 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Upper Silurian Continued Middle Ordovician Continued Bossardsville limestone (as Bos- Hershey limestone 2 sard ville limestone J) Hostler member (of Hatter for­ fPoxino Island shale 1 mation) 2 Middle Silurian Housum member (of Mercers- Center iron sandstone (in Clinton burg formation) 2 formation) 1 Kauffman member (of Mercers- Keefer sandstone member (of burg formation) 2 Clinton formation) 1 Leesport limestone 1 Lakemont formation 1 Lehigh limestone 1 Swatara iron sandstone (in Clin­ Mercersburg formation 2 ton formation) 1 Myerstown limestone 2 Lower Silurian Nagany limestone 2 Castanea sandstone l Nazareth cement rock 1 Tuscarora sandstone 1 or quartz- Nealmont limestone 2 ite 1 Nisky limestone l Ordovician (see also Cambrian and Oak Hall member (of Nealmont Ordovician) limestone) 2 Cattasauqua limestone 1 Pinesburg member (of Shippens- Cocalico shale l burg formation) 2 fCove limestone J Rodman limestone 1 fCove slate 1 Salona formation 1 Dauphin shale 2 Shippensburg formation 2 Jonestown beds or formation * Snyder member (of Benner lime­ Lost Run conglomerate 2 stone) 2 fNittany Valley limestone 1 Stover member (of Benner lime­ Paxton Creek conglomerate (in stone) 2 Martinsburg shale 2 Valley View member (of Curtin West Fairview member (of Mar­ limestone) 2 tinsburg shale) 2 Lower Ordovician Ordovician(?) or Cretaceous(f) Axemann limestone 1 Conshohocken clay l Bellefonte dolomite 1 Ordovician(f) Carlim limestone l Peach Bottom slate l Center Hall formation 1 Upper Ordovician Coplay limestone 1 fBald Eagle conglomerate 1 Larke dolomite 1 Bangor beds (in Martinsburg Lemont argillaceous limestone shale) l member (of Carlim limestone) > l Loysburg formation 1 Pen Argyl beds (in Martinsburg Mines dolomite l shale) * Nittany dolomite 1 Reedsville shale ' (as mem­ Shochary sandstone member (of ber of Beekmantown lime­ ) 2 stone J) fTyrone conglomerate 1 Valentine formation l Middle Ordovician Lower Ordovician and Cambrian(?) Antes shale 2 Conestoga limestone : Benner limestone a Cambrian and Ordovician Chambersburg limestone 1 Annville limestone l Clover member (of Loysburg Codorus limestone l formation) 2 ( Lancaster limestone 1 Coburn formation l f Valley limestone 1 Curtin limestone 2 fYork limestone 1 Doylesburg member (of Ship- Cambrian pensburg formation) 2 Blue Ridge conglomerates 1 Eyer member (of Hatter forma­ Mountain Creek rock > tion) 2 South Mountain slates l Fannettsburg member (of Ship- Street Road limestone 1 pensburg formation) 2 Upper Cambrian Grazier member (of Hatter for­ Allentown limestone l mation) 2 fBuffalo Run limestone J Greencastle bed 1 Conococheague limestone ' Hatter limestone 2 t Corn wall slates l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 539

United States Continued United States Continued Pennsylvania Continued Pennsylvania Continued Upper Cambrian Continued Precambrian Continued Gatesburg formation 1 fState line serpentine l Limeport limestone 2 fToughkenamon rock 1 Ore Hill limestone member (of Tucquan gneiss 1 Gatesburg formation) * fVera Cruz graphite schist l Stacy dolomite member (of Precambrian(f) Gatesburg formation) 1 Chester County gneiss * Warrior limestone 1 Age(f) Middle and Upper Cambrian Lima granite 2 Elbrook limestone', dolomite, or Ridley Park granodiorite 8 formation Springfield granodiorite 2 Middle Cambrian Wiltons Run » (limestone belt) Pleasant Hill limestone 1 Rhode Island Lower and Middle (?) Cambrian Pleistocene Leithsville formation » Barrington clays 1 Lower Cambrian fMohegan Bluff beds or series 1 Chickies quartzite 1 and slate Carboniferous or Post-Carboniferous fEdgehill quartzite 1 Boston Neck granite l Hellam conglomerate member Westerly granite 1 (of Chickies quartzite) 1 Carboniferous fHellam quartzite 1 fAquidneck series or shales l Kinzers formation 1 Coasters Harbor Island arkose 1 Ledger dolomite 1 Conanicut arkose * Montalto quartzite member (of Diamond Hill felsite 1 Harpers schist) J Kingstown series 1 tNorth Valley Hill sandstone l f Millers River conglomerate * fReading sandstone * Natick arkose J South Mountain quartzite l fNewport conglomerate l 1 Paradise conglomerate 1 fValley Forge quartzite 1 Portsmouth conglomerate l Vintage dolomite 1 Rose Island arkose 1 l Sachuest arkose l White Spot sandstone 1 Slate Hill shale 1 fYork schist l Tiverton arkose 1 fYork shale 1 Woonsocket conglomerate * fYork County hydromica slates 1 fWoonsocket Basin series 1 Precambrian and Lower Cambrian Pre-Carboniferous tCarmargo schist l Metacom granite-gneiss 2 Precambrian Pennsylvanian and Permian(f) ' Arrowmink arkosic gneiss l fNarragansett Basin series l ' Avondale limestone l Pennsylvanian ' Avondale series * Cranston beds 1 Buck Ridge gneiss * fPawtucket formation 1 Chestnut Hill schists and Pawtucket shale * gneisses l Purgatory conglomerate * Doe Run limestone l Rhode Island formation l fFairmount gneiss J fSakonnet sandstone 1 Frankford gneiss 1 Sockanosset sandstone * Furnace Creek quartz diorite Mississippian(f) gneiss * Cowesett granite * Kennett limestone * East Greenwich group (as granite Kennett rock 1 group l) Lafayette serpentine 1 Maskerchugg granite 2 Manayunk mica schists and Spencer Hill volcanics 2 gneisses l Devonian or older Moravian Heights formation 2 Grant Mills granodiorite (as fOctoraro schist 1 granite 0 Oley Valley slates 1 Devonian(?) or older fOverbrook granite gneiss 1 Esmond granite 2 fPhiladelphia mica schists and Scituate granite gneiss 2 gneisses 1 Precambrian Pickering gneiss 1 fAshton schists l fSouth Valley Hill slates and Blackstone series 1 mica schists l Cumberland quartzite l 540 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Rhode Island Continued South Carolira Continued Precambrian Continued Eocene, lower Little Compton shales 1 Black Mingo formation l Newport Neck shale * tLang Syne beds ' fSmithfield limestone member JRhems shale l (of Marlboro formation) * fWilliamsburg marl 1 Precambrian(f) Upper Cretaceous and Pliocene(f) Absalona formation 2 fAiken beds l Albion schist member (of West- Upper Cretaceous boro quartzite) l Black Creek formation 1 Hunting Hill greenstone 2 tBurches Ferry marl l Mussey Brook schist 2 fHamburg beds or clays r Nepsachuck gneiss 2 fMiddendorf formation l Sneech Pond schist* Peedee formation 1 Woonasquatucket formation 2 Upper Triassic South Carolina Hornsboro sandstone or zone l Pleistocene Carboniferous(f) fAccabee gravels * Table Rock granite l fBohicket marl sands l Lower Mississippian {Hampton clays 1 Yorkville quartz monzonite (as Horry clay 2 granite ') Myrtle Beach peat * Cambrian(f) "Sea Island sands or loams * Chauga zone 1 Simmons Bluff beds 1 Cherokee zone 1 ' Tenmile sands > Poor Mountain limestone series 1 Wadmalaw shell marl or phase 1 Probably Lower Cambrian ' Wando clays and sands > Blacksburg schist 1 Pleistocene and Pliocene(f) fCherokee limestone l fCheraw cobbles * Gaffney marble 1 Pliocene Precambrian fGoose Creek marl or phase * Abbeville-York zone l Pliocene, lower Anderson-Spartanburg zone * Waccamaw formation 1 Battleground schist l Carolina gneiss l Miocene Chatooga zone l fCombahee shale * Chesterfield zone l fSalkehatchie marl or phase l Edgefield-Chesterfield zone J Miocene, upper Keowee zone 1 fPeedee marl 1 Oconee Creek zone 1 fRaysor marl l Saluda zone l Miocene, lower Spartanburg zone l fEdisto marl » Stevens Creek slates l Eocene Tunnel Hill zone 1 fCarolinian bed 1 Tyger zone l Eocene, upper, or Oligocene Vaucluse zone l Cooper marl 1 York zone l fKings Creek silex or phase * South Dakota Pleistocene Eocene, upper Herrick gravels 8 tAshley marl l Orton gravels * Barnwell sand l ; formation in Pleistocene (pre-Wisconsin) Georgia Moreau gravels 2 fCongaree clay member l (of Tertiary, middle McBean formation) Whitean series l fCooper-Ashley beds l Pliocene f Mount Hope marl or phase 1 Little White River beds » Eocene, middle and upper Miocene to Pliocene fSantee beds l Bijou formation * Eocene, middle Miocene, upper, or Pliocene, lower fCaw Caw formation or sands * Oak Creek formation l Congaree formation (as shale *) Miocene, lower and middle fOrangeburg formation l Rosebud beds l Santee limestone 1 Oligocene, middle and upper Warley Hill marl l ; fphase * or clay * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 541

United States Continued United States Continued South Dakota Continued South Dakota Continued Oligocene, lower, middle, and upper Lower Cretaceous White River formation or group * Fall River formation (as sand­ Oligocene, lower stone *) Ahearn member (of Chadron Fuson member (of Lakota for­ formation) 2 mation) ; (as shale l) Crazy Johnson member (of Chad­ Lakota formation (as sandstone 1) ron formation) 2 Minnewaste limestone 1 member Peanut Peak member (of Chad­ (of Lakota formation) ron formation) 2 Upper Jurassic Eocene or Oligocene Redwater shale member (of Ree beds l ) 2 Unkpapa sandstone l Paleocene Permian and Triassic Ludlow member (of Fort Union Spearfish formation 1 formation); (as member of Permian Lance formation x) Minnekahta limestone l Cretaceous Opeche formation l or shale Ardmore bentonite bed (in Pierre Pennsylvanian formation) 2 Minnelusa sandstone 1 Bull Creek sand (in Hell Creek Lower Mississippian member of Lance formation)* Englewood limestone 1 Middle Creek limestone ledge Pahasapa limestone 1 (in Graneros formation) 1 Upper Ordovician Oacoma zone (in Sully member Whitewood limestone l or dolo­ of Pierre formation) 2 mite Stoneville member (of Fox Hills Middle Ordovician sandstone) 2 Ice Box shale 2 Sully member (of Pierre forma­ Roughlock siltstone 2 tion) 2 Upper Cambrian fPierran series l Deadwood formation * Upper Cretaceous Precambrian Agency shale member (of Pierre Corson diabase l formation) 2 De Smet formation 1 Blackhorse shales l Ellison formation l Crow Creek member (of Pierre Estes system 1 shale) 2 Flag rock formation * DeGrey member (of Pierre Game Lodge granite 2 shale) 2 Garfield formation l Elk Butte member (of Pierre Grizzly formation 2 shale) 2 fHarney granite * fFt. Pierre group l Harney Peak granite x Fox Hills sandstone 1 Homestake formation 1 Gregory member (of Pierre Lead system l shale) 2 Little Elk gneissoid granite * Hermosa lens (in Newcastle for­ Nemo series l mation) 2 Northwestern formation 1 Interior formation l Pluma formation l Mobridge member (of Pierre Poorman formation l shale) 2 Roubaix group 2 Orman Lake limestone member Samelias formation 2 (of Greenhorn formation) 2 1 Pierre shale 1 West Ledge formation 1 Rapid City lens (in Newcastle Tennessee formation) 2 Pleistocene Tilford lens (in Newcastle for­ Memphis loess l mation) 2 Milan loam l Timber Lake member (of Fox Eocene Hills sandstone) 2 fLagrange formation * Trail City member (of Fox Hills Paleocene sandstone) 2 fCrainesville horizon l Verendrye member (of Pierre fFlatwoods group l shale) 2 fMiddleton formation l Virgin Creek member (of Pierre Porters Creek clay 1 or forma- shale) 8 542 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Tennessee Continued j Tennessee Continued Cretaceous Lower Mississippian Western Valley gravel 1 Eulie shale 2 Upper Cretaceous Maury formation (as member of Coffee sand 1 or formation Ridgetop shale ') Coon Creek tongue (of Ripley Ridgetop shale l formation) 1 Short Mountain facies (of Fort McNairy sand or sand member Payne formation) a (of Ripley formation) l Westmoreland shale 2 fMcNairy shell bed 1 Devonian or Carboniferous Pennsylvanian Cumberland Gap shale member fBon Air Measures l (of Chattanooga shale) 1 fBrushy Mountain Measures l Olinger gray shale member (of fClifty shale » Chattanooga shale) * Crossville sandstone (in Duskin Devonian and Mississippian Creek formation) * Chattanooga shale ' Duskin Creek formation * Grainger shale * or formation f Emory sandstone * Etna sandstone l Upper Devonian or Mississippian Fentress shale division (in Lee Swan Creek phosphate 1 formation) 1 Upper Devonian Frozenhead grit (in Anderson Bransford sandstone bed (in sandstone) l Gassaway member of Chat­ Herbert conglomerate 1 tanooga shale) 2 Jellico formation l Dowelltown member (of Chat­ fMonterey conglomerate * tanooga shale) 2 Newton sandstone l Gassaway member (of Chat­ Pilot Knob sandstone l tanooga shale) 2 Pioneer sandstone 1 Hardin sandstone member (of fTracy City Measures l Chattanooga shale) J Walden sandstone 1 Trousdale shale 1 Windrock sandstone l Lower or Middle Devonian Middle Pennsylvanian Camden chert 1 Anderson sandstone ! Pegram limestone 1 Bryson formation 1 Lower Devonian Mingo formation l Bear Branch limestone member Scott shale 1 (of Olive Hill formation) » Wartburg sandstone 1 Birdsong shale 1 Lower and Middle Pennsylvanian Cypress Creek chert ' Briceville shale * Decaturville chert > Flat Gap limestone member (of Lower Pennsylvanian Olive Hill formation) l Bonair sandstone 1 Harriman chert 1 Eastland shale lentil (in Bonair Linden group 1 sandstone) 1 Olive Hill formation l Gizzard formation 1 ; member (of Pyburn limestone member (of Lookout sandstone in Georgia) Olive Hill formation) l Sewanee conglomerate l or mem­ Quail limestone l ber (of Lookout sandstone) Rockhouse shale 1 Vandever shale l Ross limestone member (of Olive Warren Point sandstone member Hill formation) 1 (of Gizzard formation) 1 Silurian and Devonian Whitwell shale l fHarpeth and Tennessee River group l fGlendale shale * Upper Silurian and Devonian fHarpeth shale l Hancock limestone > or dolomite Newman limestone 1 Upper Silurian fNewman sandstone lentil (in Decatur limestone 1 Newman limestone) l fSneedyille limestone l fTullahoma formation 1 Middle Silurian Upper Mississippian Beech River shaly limestone Garrett Mill sandstone member member (of Brownsport forma­ (of Warsaw formation) 1 tion) i INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 543

United States Continued United States Continued Tennessee Continued Tennessee Continued Middle Silurian Continued Middle Ordovician Continued Bledsoe limestone 1 Holston marble, limestone 1 or Bob crystalline limestone mem­ formation ber (of Brownsport forma­ Lebanon limestone * tion) 1 Lenoir limestone 1 Brownsport formation 1 Meadow marble member (of Centerville limestone 1 Sevier shale) 1 Clifton formation > Mosheim member (of Lenoir Dixon earthy limestone member limestone); (as limestone *) (of Wayne formation) l Mount Pleasant phosphate l fGant bed » Murfreesboro limestone 1 Glenkirk limestone 1 Ottosee shale or limestone l Lego limestone member (of Pierce limestone 1 Wayne formation)* Ridley limestone * Lobelville shaly limestone mem­ fSaltillo limestone 1 ber (of Brownsport forma­ Sevier shale 1 or formation tion)! Speers Ferry formation 2 Maddox limestone l Stones River group or lime­ Newsom shaly clay 1 stone l South Tunnel bed » Strasburg limestone 2 Wayne formation l Tellico formation or sandstone White Oak Mountain sandstone l member (of Sevier shale); Whites Bend limestone * (as sandstone l) Lower and Middle Silurian Ward limestone 1 Clinch sandstone 1 or quartzite t Wells limestone 1 Rockwood formation * Wells Creek dolomite (as lime­ Lower Silurian stone l) t Baker limestone 1 Whitesburg limestone * member Ordovician (of shale) (as sandstone *) Lower, Middle, and Upper Or­ Inman formation 2 dovician Upper Ordovician and Silurian fCentral limestone and shale fClinch Mountain sandstone l group 1 Upper Ordovician Chickamauga limestone * Camargo formation 2 Lower Ordovician limestone l Forked Deer limestone l Fernvale limestone 1 or forma­ f Glade limestone l tion 1 Grasselli dolomite (in Kingsport Leipers limestone 1 formation) 2 fLeipers Creek limestone * Heisketl shale 1 Mannie shale (as clay *) Jonesboro limestone 1 Kingsport formation or dolomite J Sequatchie formation 1 fKnoxville marble l Swan Creek limestone » {Lebanon group * Middle and Upper Ordovician Mascot dolomite 2 fNashville group 1 Thorn Hill formation 1 Normandy limestone l Vestal limestone 1 Middle Ordovician fWells chert» Athens shale 1 Cambrian and Lower Ordovician Bigby limestone 1 fKnoxville group ! Cannon limestone 1 Upper Cambrian and Lower Ordo­ t Capitol limestone l vician Blount group > l or group Carters limestone (as member of Upper Cambrian Lowville limestone *) Bloomingdale limestone member l Catheys limestone l (of Conocheague-Copper Ridge Chapman Ridge sandstone 2 formation) Douglas Lake member (of Lenoir * limestone) 2 Greenville dolomite l Farragut limestone 2 Maynardville limestone x mem­ Hermitage formation 1 or lime­ ber (of Nolichucky shale); stone formation in Virginia 544 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Tennessee Continued Texas Continued Upper Cambrian Continued Recent Morristown dolomite member ' Ingleside formation 2 (of Conococheague-Copper Lake Charles formation 2 Ridge formation) Pleistocene Nolichucky shale l Alta Loma sand 2 (subsurface) Middle and Upper Cambrian Beaumont clay l JKnox shale 1 Durst silts 2 Middle Cambrian Elm Creek silts 2 Craig limestone member (of Houston group l Rogersville shale) 2 Leona formation l Maryville limestone l Lissie formation x Pumpkin Valley shale 2 Onion Creek marl 1 Rogersville shale 1 Rio drift l Rutledge limestone 1 or dolomite Rita Blanca deposits 2 Lower Cambrian fRock Creek beds 1 Apison shale * Seymour formation 1 fBeaver limestone 1 Spring Creek deposits 2 fChilhowee conglomerate ! Tahoka clay 2 l Tule formation 1 fCitico conglomerate l Tertiary Cochran conglomerate 1 fAngelina series ' Erwin quartzite l or formation Cottonwood Spring basalt 2 Hampton shale 1 or formation Crossen trachyte 2 Helenmode member (of Erwin Duflf formation 2 formation) 2 syenite 2 Hesse quartzite l member (of Goodnight formation x Erwin formation) or sandstone Green Valley volcanic series 2 fKnox sandstone l Huelster formation a Moccasin Gap member (of Unicoi Jeff conglomerate member (of formation) a Huelster formation) 2 Murray shale or shale member McCutcheon volcanic series 2 (of Erwin formation); (as slate Mitchell Mesa rhyolite 2 or shale *) andesite a Nebo quartzite 1 member (of Pruett formation 2 Erwin formation) or sandstone Seven Springs formation 2 Nichols shale (as slate l) Sheep Canyon basalt * 1 or formation Square Peak volcanic series * fStarr conglomerate l Unicoi formation * Star Mountain rhyolite 2 fWatauga shale l Texhoma series * Precambrian Tertiary (?) Cades sandstone (as conglomer­ Burro gravel and tuff l ate ») Tertiary, lower Copperhill formation 2 Ben Day porphyry 2 Linville metadiabase > Mitre Peak complex * Ocoee series (as group *) Tertiary or younger Pigeon slate ' or siltstone Roan gneiss 1 Butcherknife basalt a Sandsuck formation (as shale ') Pliocene Thunderhead sandstone (as con­ fBlanco Canyon beds l glomerate >) Clarendon beds * Wilhite formation (as slate *) Coetas formation l Precambrian (?) Goliad sand 1 fHiwassee slate 1 Labahia member (of Goliad for­ Mount Rogers volcanic group 2 mation) l Texas Lagarto Creek beds (in Goliad Quaternary sand) l Calamity formation a Lapara sand member (of Goliad Delaney gravel 2 sand) ! Judkins formation a fLlano Estacado formation 1 Kokernot formation 2 fPalo Duro beds 1 Monahans formation 2 fPanhandle beds 1 Neville formation 2 Potter formation » Terra Blanca formation 1 fStaked Plains formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 545

United States Continued United States -Continued Texas Continued Texas Continued Pliocene(f) Oligocene(?) Hockley Mound sand member Frip clay 1 (of Wiffls sand) 1 Quitman quartz monzonite 2 Uvalde gravel * Refugio sand ' (subsurface) fWillis feruginous sand member * Saxet sand x (subsurface) (of Willis sand) fYeager clay l Willis sand » Oligocene, middle Pliocene, middle Greta sand l (subsurface) Blanco formation 1 Eocene to Miocene(f) Bridwell formation 2 Buck Hill volcanic series 2 Pliocene, lower Eocene Couch formation 2 t Angelina County beds 1 Hemphill beds 1 Buttsgin formation l Miocene and Pliocene Cartright sand 1 (subsurface) Dewitt formation 1 Christine member (of Yegua for­ Dugout clay and gravel l mation) * fNavasota beds l Cistern member (of Yegua for­ Miocene mation) 2 Moulton sandstone member (of Cole sand l (subsurface) Oakville formation) 1 Crockett member l (of Claiborne Oakville sandstone 1 formation) Onalaska clay l Diboll member l (of Jackson for­ Miocene (?) mation) Lagarto clay * Dime Box member (of Yegua for­ Rawls basalt * mation) 2 fRockland sandstone ! fElstone formation * Miocene, upper, and Pliocene(f) Gazley Creek sands and clays 1 Burkeville beds 1 Holzmark sand * (subsurface) fFleming clay or group l fLipan beds 1 Miocene, upper Low Creek beds * Cuero formation 2 fLufkin beds 1 Miocene(f), lower(t) Lufkin member (of Cook Moun­ Chita sand member (of Cata- tain formation) 1 houla formation) 1 fLytton formation ' Corrigan formation l Manning beds l (see p. 621) Dunlap Quarry sandstone mem­ fMyrick formation l ber 1 (of Catahoula formation) Northrip member (of Yegua Oligocene or younger formation) * Tascotal formation 2 fSabine River beds l Oligocene and younger(?) Seco formation l Decie member (of Duff forma­ fSquirrel Creek formation l tion) 2 fTimber Belt beds l Turkey Creek beds (in Yegua Oligocene and Miocene(f) formation) l Gueydan group l fWebb Bluff x (greensand marls) Oligocene or Miocene, lower Yegua River conglomerate (in Chusa tuff member (of Cata­ Yegua formation) * houla tuff) * Eocene(?) Fant tuff member (of Catahoula Uvalde phonolite l tuff) 1 Eocene, upper fGueydan formation 1 Agua Verde shale member (of Soledad volcanic conglomerate Fayette formation) 2 member (of Catahoula tuff) 1 Bedias sandstone member * (of Oligocene Wellborn formation) Anahuac formation 2 (subsur­ face) Cadell formation (as clay x) Driscoll-Sevier sand 2 (subsur­ Calliham sand l (see p. 621) face) Carlos sandstone member l (of Flour Bluff sand 2 (subsurface) Wellborn formation) Old Ocean shale 2 (subsurface) Conroe sand 1 (subsurface) Pierce Estate sands 2 (subsurface) Dilworth sand 1 (see p. 621) Van Vleck sands 2 (subsurface) Driscoll sand l (subsurface) 546 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Texas Continued Texas Continued Eocene, upper Continued Eocene, middle Continued Dubose sands and clays 1 (see p. 621) Los Arrieros shale member (of Yegua formation) 2 Falls City shale » Marquez shale member (of Fashing clays * (see p. 621) Reklaw formation) 2 Fayette sandstone l Mills bed » Glendale beds l Moseley limestone lentil l (in Gorgora shale member (of Crockett member of Cook Fayette formation) 2 Mountain formation) Government Wells sand l (sub­ Mount Selman formation 1 surface) Mount Tabor shale member (of Grawunder sand 1 (subsurface) Crockett formation) 2 Gutoskey sand ! (subsurface) Nacogdoches beds > Jacob sand l (subsurface) Newby glauconitic sand member McElroy member (of Fayette (of Reklaw formation) 2 sandstone) l (see p. 621) Noonday greensand 1 Mirando sand l (subsurface) Omen member (of Mount Selman Mirando City sand l (subsurface) formation)' Mitchells Ferry beds J Palafox sandstone member (of Nichols sand l (subsurface) Mount Selman formation) 1 Olmos sand 1 Queen City sand member (of Fetters sand l (subsurface) Mount Selman formation) l Resendez shale member (of Reklaw member (of Mount Sel­ Fayette formation) 2 man formation) 1 Rock Prairie sandstone 2 San Augustine group l Salineno sandstone member (of Schott sand J (subsurface) Fayette formation) 1 Serbin sand lentil (in Mount Simms sand 1 (subsurface) Tabor member of Yegua for­ Stones Switch sand J (see p. 621) mation) 2 Wellborn sandstone 1 Smetana sandstone 2 Whitsett formation (as beds !) Spiller sand member (of Crockett (see p. 621) formation) 2 Wooleys Bluff clays * Stone City beds l Yuma sandstone member * (of Tabor member (of Crockett for­ Manning formation) mation) 2 Eocene, middle Therrill clay member (of Weches Arp sand member (of Reklaw formation) 2 formation) 2 Tuleta sand l (subsurface) Bigford member (of Mount Sel- Two Mile member (of Crockett man formation) 2 formation) 2 Byran sandstone 2 Tyler greensand member (of Carrizo sand 1 Sparta sand) 1 Cook Mountain formation l Tyus member (of Weches forma­ Easterwood shales 2 tion) 2 Eaton green sand lentil (in Veleno member (of Cook Moun­ Claiborne group) 1 tain formation) 2 Falcon sandstone member (of Viesca member (of Weches for­ Cook Mountain formation) 1 mation) 2 Garceno sandstone member (of Webster sand l (subsurface) Cook Mountain formation) 2 Weches greensand member (of Hurricane marine lentil (in Land- Mount Selman formation) 1 rum member of Cook Moun­ Weiss sand l (subsurface) tain formation) 2 Wheelock marl member (of Crock­ Jennings sand 1 (subsurface) ett formation) 2 Jos6 shale member (of Yegua Yegua formation l formation) 2 Eocene, lower Landrum shale member (of Butler clay member (of Rockdale Crockett formation) 2 formation) l La Perla shale member (of Yegua Caldwell Knob member (of Se- formation) 2 guin formation) 1 Laredo formation 3 Calvert Bluff clay beds (of Rock- Little Brazos limestone lentil (in dale formation) l Claiborne group) x Hilbigzone J (in Rockdale formation) "Loma Blanca tongue (of Yegua Hooper formation 2 formation) 2 Indio formation l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 547

United States Continued United States Continued Texas Continued Texas Continued Eocene, lower Continued Upper Cretaceous Continued Losoya Creek conglomerate (in Blossom sand 1 Sabinetown formation) 1 fBlue Bluffs division l Pendleton formation 2 Bluebonnet member (of Lake Pendleton Ferry formation 2 Waco formation) 2 Pendleton zone l Bonham marl l Rockdale formation 1 Boquillas flags 1 fSabine formation * Bouldin member (of Lake Waco Sabinetown formation * formation) 2 Seguin formation ' Britton clay l Simsboro sand member (of Rock- Buda limestone 1 dale formation) l Burditt marl 1 Solomon Creek member (of Se­ Carpenter bed ! guin formation) 1 Carpenter limestone member (of fTehuacana formation 1 Grayson formation) 2 Paleocene Chispa Summit formation l Kerens member (of Wills Point fCline l (beds) formation) 1 Cloice member (of Lake Waco Kincaid formation 1 formation) 2 Littig glanconitic member (of Colquitt formation 1 Kincaid formation) 1 Cooledge chalk 1 Lone Oak limestone lentil (in Corsicana marl 1 Kincaid formation) 1 Crown conglomerate l Mexia member (of Wills Point fDallas limestone 1 formation) 1 fDel Rio clay J Pisgah member (of Kincaid for­ Dessau formation a mation) 1 Dexter member (of Woodbine Rocky Cedar Creek limestone formation) 1 lentil (in Kincaid formation) l Durango sand member (of Tay- Rosette bed (in Midway forma­ lor marl) 1 tion) 2 Eagle bed 1 Tehuacana member (of Kincaid Eagle Ford shale, clay l or forma­ formation) l tion Wills Point formation l Eagle Mountains sandstone fWortham aragonite lentil (in member (of Grayson forma­ Wills Point formation) 1 tion) 2 Cretaceous Eagle Pass formation x t Cross Timbers 1 (sands or for­ Ector tongue (of Austin chalk) 1 mation) Edens sand J (subsurface) Kanawha volcanic zone (of Eagle- Eldorado sand 1 (subsurface) ford formation) 2 Escondido formation l Kirschberg evaporite (in Ed­ Euless member (of Woodbine wards limestone) 2 formation) 2 Lake Crockett formation 2 Farias beds l Lasca formation 2 Fizzle Flat lentil (in Terlingua Medill volcanic zone (of Eagle- formation) 2 ford formation) 2 Gober tongue (of Austin chalk) l Pine Bluff volcanic zone (of Grayson formation, shale, or marl Eagleford formation) 2 (as marl member of Denison Tarantula formation 2 formation J) Cretaceous (?) Gulf series 1 Iron Mountain intrusive 1 Kemp clay l Ojo Bonito porphyry 1 fKickapoo marl l Toborg sand 1 (subsurface) Lake Waco formation 2 Upper Cretaceous and Tertiary Lewisville formation or member Chisos volcanics (as beds 0 (of Woodbine formation); (as Upper Cretaceous marine member of Woodbine Aguja formation x sand *) Anacacho limestone * fLott chalk member (of Taylor Annona chalk l marl) l Arcadia Park formation 1 Springs sand * (sub­ Austin chalk 1 surface) fBexar 1 [unit] fMarlin chalk member (of Taylor Black Prairie series 1 marl) 1 504835 58 10 548 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Texas Continued Texas Continued Upper Cretaceous Continued Lower Cretaceous Continued Morrow pay sand l (subsurface) Carr sand ! (subsurface) Navarro group 1 or formation Cedar Park member l (of Walnut Neylandville marl * clay) Olmos formation ! fChoctaw limestone 1 Pecan Gap chalk member) of t Comanche Peak group 1 Taylor marl) l Comanche Peak limestone 1 Pepper shale member (of Wood­ Cow Creek limestone member (of bine formation); (as forma­ Travis Peak formation or Pear- tion !) sail formation); (as beds *) Pilot Knob tuff 2 Cox sandstone 1 Powell sand 1 (subsurface) Cuchillo formation 1 fPinto limestone l Dees horizon or sand 1 (sub­ fPulliam formation 1 surface) {Rattlesnake beds 1 t Denison formation 1 Red Branch member (of Wood­ Denton clay (as member of bine formation) 2 Denison formation x) fRed River group 1 Devils River limestone 1 Rogers chalk lens (in Taylor Duck Creek limestone (as for­ marl) 1 mation *) fRoxton beds 1 Edwards limestone l St. Edwards tuff * Espy formation 2 San Carlos formation 1 Etholen conglomerate * San Miguel formation 1 Finlay limestone 1 South Bosque marl l Fort Worth limestone 1 fsub-Clarksville sand l (sub­ Fredericksburg group 1 surface) Gatesville formation l Tarrant formation * or member fGainesville * [group] (of Lewisville formation) Gait sand * (subsurface) Taylor marl l Georgetown limestone * Templeton member (of Wood­ Glen Rose limestone l or for­ bine formation) 2 mation Terlingua clay 1 t Grand Prairie formation l Thrall sand l (subsurface) Hensell sand member (of Travis fTimber Creek beds 1 Peak formation) l or shale {Timber Creek group l member (of Pearsall forma­ Tornillo clay l tion) in subsurface Upson clay l Hill sand horizon 1 Valverde flags l fLeander beds l Vieja series l Main Street limestone (as mem­ Webberville beds l ber of Denison formation l) Wolfe City sand member (of Maness shale member (of Tyler Taylor marl) * formation) 2 (subsurface) Woodbine sand, clay, l or for­ t Marietta beds 1 mation Maxon sandstone 1 Lower and Upper Cretaceous Mountain bed l Comanche series 1 Muleros sandstone l Lower Cretaceous fNorth Denison sand l t Austin marble 1 Paluxy sand x or formation Bacon limestone member (of Pawpaw formation (as sandy Ferry Lake formation) 2 (sub­ member of Denison forma­ surface) tion ») fBarton Creek limestone l Pearsall formation 2 (subsurface) Bluff bed i fPottsboro subgroup 1 Bluff Dale sand (in Travis Peak formation l formation) l fPreston formation 1 Bluff Mesa formation 2 Quitman bed 1 Bonnellian series 1 Shafter limestone * Boracho sandstone 2 Shingle Hills formation 2 fBosque division 1 fShoal Creek limestone 1 Burnt limestone 2 South Tyler formation 2 (subsur­ Caddo Levee Board horizon 1 face) (subsurface) Sycamore sand (in Travis Peak Campagrande formation 1 formation) l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 549

United States Continued United States Continued Texas Continued Texas Continued Lower Cretaceous Continued Permian Continued Thorp Springs limestone l fDos Alamos gypsum member (of Torcer formation 1 Delaware Mountain formar Travis Peak formation 1 tion) * ^ Travis Peak limestone (in Travis fDothan limestone (in Moran Peak formation) 1 formation) 1 Trinity group or sand 1 t Double Mountain formation l Trinityan series 1 Doublian series l University Mesa marl 1 Dozier sandstone member (of Walnut clay l ; shaly member (of Rush Springs formation); (as Goodland limestone) l in NE member of Peacock forma­ Texas tion ») fWashita limestone 1 Eskota beds l Weatherford lime rock 1 (subsur­ Eskota dolomite or gypsum 1 face) fFrijole limestone member (of Delaware Mountain forma­ Weno limestone or clay (as clay tion) i member of Denison forma­ Frijole shale 1 tion ») Fulda sandstone 1 fWeno subgroup ! Glass Mountains formation l Yucca formation (as bed x) Groesbeck dolomite 1 Upper Jurassic Guthrie dolomite l Malpne formation * Hardin School limestone 1 Triassic Hartgrove limestone member (of Bissett conglomerate l Talpa formation) l Camp Springs conglomerate 1 Hart School bed (in Moran Dockum group l formation) l Dockuman series 1 Hueconian 1 (series) Tecovas formation 1 Indian Creek shale member (of Trujillo formation l Admiral formation) 1 Permian and Triassic Lake Kemp limestone (in Lueders t Brazos series l formation) l Permian Lake Lytle limestone l Abilene formation l Lake Trammel sandstone 1 Acme dolomite (in Blaine forma­ Limpia x (limestone) tion) i Lytle limestone 1 Albanian series l McCaulley dolomite 1 t Albany formation 1 Maravilla dolomite 1 Alta formation x Maybelle limestone 1 Apache limestone l f Memphis sandstone (in Peacock Aspermont dolomite 1 formation) l Bayloran series 1 Millersview limestone member Beaverburk limestone l (of Grape Creek formation) 1 lime 1 (subsurface) Mina Grande formation a fBlowout Mountain sandstone ' fMoran limestone member (of Bluff bone bed l Moran formation) 1 fBone Canyon limestone * Morrison sand 1 (subsurface) Briggs formation 2 Oriana gypsum member (of Pea­ Buffalo Hill sandstone 1 cock formation) 1 Childress dolomite member (of Otero limestone l Marlow formation); (as mem­ Paint Rock bed * ber of Dog Creek shale J) fPeacock formation l Chinati series l Putnam limestone (in Putnam Cibolo formation x formation) l Cieneguita beds * Putnam sandstone (in Putnam Claytonville dolomite 1 formation) 1 Quanah gypsum l Claytonville gypsum 1 Royston formation l fColeman division 1 fRustler Springs formation l Coleman bed, clay, or limestone Shultz limestone member (of (in Admiral formation) 1 Talpa formation) 1 Croton gypsum l Sweetwater dolomite 1 Culberson series 1 Swenson gypsum member ( (of Delaware Mountain sandstone l Peacock formation) 550 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Texas C ont inue d Texas Continued Permian Continued Permian (Guadalupe) Con tinued Texon sand * (subsurface) Vidrio limestone member (of Tye formation l Word formation); (as member Wagon Yard gypsum l of Capitan limestone *) Wahs Creek shale (in Moran Word formation 1 formation) 1 Permian (Leonard-Guadalupe) Ward gypsum l Pipeline shale 2 fWichita conglomerate (in Clear Permian (Leonard) Fork formation) 1 Arroyo formation > Winkler Ford limestone member Bone Spring limestone * (of Grape Creek formation) 1 Bullwagon dolomite 1 member Yates sandstone 2 (subsurface); (of Vale formation) formation 2 (subsurface and Choza formation 1 surface in New Mexico) Clear Fork group (as formation Yoakum dolomite member (of or group J) Queen formation) 2 (subsurface) Collingsworth gypsum member Permian (Ochoa) (of Blaine formation) 1 Castile gypsum J or formation Cutoff shaly member (of Bone Cowden anhydrite member (of Spring limestone) 2 Salado formation) 2 Hess limestone member (of Dewey Lake redbeds 2 (subsur­ Leonard formation) 1 face) Kirby Lake dolomite a Rustler formation l or limestone 1 Leonard formation l or series Salado formation (as halite J); Merkel dolomite member (of (subsurface and surface) Choza formation); (as member Tessey limestone 1 of Clear Fork formation J) Permian (Guadalupe) Pease River group 2 Alibates dolomite lentil (of Rainy limestone member (of Quartermaster formation) l Arroyo formation); (as mem­ Altuda formation (as shaly mem­ ber of Clear Fork formation *) ber of Capitan limestone l) San Angelo sandstone l Bell Canyon formation 2 Sprayberry sandstone 2 (subsur­ Brushy Canyon formation 2 face) Capitan limestone 1 Standpipe limestone member (of Cherry Canyon formation 2 Arroyo formation); (as member Delaware Mountain group (as of Clear Fork formation l) formation x) Vale formation 1 Getaway limestone member (of Victorio Peak gray member (of Cherry Canyon formation) 2 Bone Spring limestone) 1 Gilliam thin-bedded member (of Permian (Leonard?) Capitan limestone) 1 Bead Mountain limestone mem­ Goat Seep limestone 2 ber (of Belle Plains forma­ Guadalupe series (as group J) tion) 1 Hegler limestone member (of Belle Plains formation x Cherry Canyon formation) 2 Clyde formation 1 Lamar limestone member (of Elm Creek limestone member (of Bell Canyon formation); (as Belle Plains formation); (as member of Delaware Mountain member of Admiral forma­ formation x) tion i) McCombs limestone member (of Grape Creek limestone member Bell Canyon formation) 2 (of Clyde formation) * Manzanita limestone member Jagger Bend limestone 1 member (of Cherry Canyon formation) 2 (of Belle Plains formation) Pinery limestone member (of Jim Ned shale member (of Belle Cherry Canyon formation) 2 Plains formation) 2 Rader limestone member (of Lueders limestone 1 Cherry Canyon formation) 2 Talpa limestone l member (of Ross Mine formation 2 Clyde formation) Saddlehorse gypsum lentil (of Valera shale 1 member (of Belle Quartermaster formation) J Plains formation) South Wells limestone member Voss shale member (of Belle (of Cherry Canyon formation) 2 Plains formation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 551

United States Continued United States Continued Texas Continued Texas Continued Permian (Leonard? and Wolfcamp) Pennsylvanian Continued Wichita formation or group l Archer County sand 1 (subsur­ Permian (Wolfcamp) face) Admiral formation 1 Balsora limestone (in Palo Pinto Camp Colorado limestone mem­ formation) 2 ber (of Pueblo formation) 1 Barton Creek limestone (in Mill- Camp Creek shale member (of sap Lake formation) l Pueblo formation) 1 Bend sand 1 (subsurface) Coleman Junction limestone Berino member (of Magdalena member (of Putnam forma­ formation) 2 tion) i Big Valley bed ' Coon Mountain sandstone mem­ Binney sand l (subsurface) ber (of Pueblo formation) * Bishops Cap member (of Mag­ Dean sandstone 2 (subsurface) dalena formation) 2 Deer Mountain red shale mem­ Bond sand 1 (subsurface) ber (of Hueco formation) 1 Boone Creek limestone member Fisk formation 2 (of Palo Pinto limestone) 1 Gouldbusk limestone member Brannon limestone member (of (of Moran formation) 2 Millsap Lake formation) 1 Hordes Creek limestone member Brannon Bridge limestone (in (of Admiral formation) 1 Millsap Lake formation) 1 Horse Creek limestone member fBreckenridge formation l (of Moran formation) l Breckenridge lime 1 (subsurface) Hueco limestone 1 Brelsford sand l (subsurface) Ibex limestone 2 Brick Yard limestone 1 Kriz lens (in Hueco formation) 2 Bridgeport limestone (in Palo Lost Creek shale member (of Pinto formation) 1 Admiral formation) 1 Brown Creek bed (in Strawn Moran formation 1 formation) 1 Overall limestone member (of fBrownwood division 1 Admiral formation) 2 Bryson sand 1 (subsurface) Powwow conglomerate member Buck Creek sandstone 1 (of Hueco limestone) > Buffalo Creek bed (in Strawn Pueblo formation l formation) 1 Putnam formation l Bull Creek sandstone (in Strawn Saddle Creek limestone member formation) > (of Pueblo formation); (as fBunger formation 1 member of Harpersville forma­ Burkburnet sands J (subsurface) tion i) Burkett sand 1 (subsurface) Salt Creek Bend shale J member Burnt Branch bed (in Strawn (of Pueblo formation) formation) 1 Santa Anna shale member (of Buttram sand 1 (subsurface) Moran formation) 1 Caddo 1 (subsurface) Santa Anna Branch shale member Chico Ridge limestone (in Gra- (of Putnam formation) 1 ford formation) 1 Sedwick limestone member (of Childers sand * (subsurface) Moran formation) 1 Cisco Lake sandstone 2 Stockwether limestone member fClear Creek limestone member (of Pueblo formation) 1 (of Graford formation) 1 Waldrip member (of Pueblo for­ Comanche Creek bed (in Strawn mation) ; (as member of Har­ formation) 1 persville formation x) Cook sand 1 (subsurface) Watts Creek shale member (of Cottonwood Creek beds (in Moran formation) 1 Strawn formation) 1 Wildcat Creek shale member (of Cross Cut sand l (subsurface) Admiral formation) 2 Cross Plains sand 1 (subsurface) Wolfcamp formation l or series Cundiff limestone (in Caddo Carboniferous Creek formation') 1 Cimarronian series 1 Dalmar sand 1 (subsurface) Wichitan series ' Dennis Bridge limestone (in Wiley dolomite 1 Millsap Lake formation) l Pennsylvanian Desdemona sand 1 (subsurface) Antelope Creek bed (in Strawn Devils Den limestone (in Gra­ formation) 1 ford formation) l 552 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Texas Continued Texas Continued Pennsylvnnian Continued Pennsylvanian Continued Dickerson member (of Millsap Lake Bridgeport shale 1 Lake formation) 1 La Tuna member (of Magdalena Dimple limestone 1 formation) 2 Dobbs Valley sandstone (in Mill- Lazy Bend member (of Millsap sap Lake formation) 1 Lake formation) 1 Dog Bend limestone (in Mineral Lone Camp limestone (in Min­ Wells formation) 1 eral Wells formation) 1 Dugout beds J Lower Freeman-Hampton sand 1 Earnest sand 1 (subsurface) (subsurface) fEastland formation 1 Lynch Creek bed (in Strawn for­ fEastland limestone member (of mation) 1 Caddo Creek formation) 1 McClesky sand J (subsurface) Eastland sandstone (in Graham McMillan sand l (subsurface) formation) 1 Martin Lake limestone (in Palo Elliott Creek bed (in Strawn Pinto formation) 1 formation) 1 Meek Bend limestone (in Mill- Elm Creek limestone x sap Lake formation) 1 Eolian limestone member (of Milburn shale 1 Pueblo formation) 1 fMillsap division (in Strawn Finis shale member (of Graham group) 1 formation) 1 Moutray sand l (subsurface) Fox Ford bed (in Strawn forma­ Necessity shale member (of Gra­ tion) 1 ham formation) 1 Fry sand 1 (subsurface) Noodle Creek lime 1 (subsurface) Gaptank formation 1 Nimrod limestone l Goen limestone (in Millsap Lake Nimrod shale (in Pueblo forma­ formation) 1 tion) 1 Gonzales Creek shale member Olden sand x (subsurface) (of Graham formation) l Oran sand lentil (in Graford for­ t Gonzales shale 1 mation) 1 Gordon sandstone (in Strawn Posideon shale member (of Gra­ formation) 1 ford formation) 1 Gose sand J (subsurface) fRanger formation l fGraford limestone member (of Ranger oil sand 1 (subsurface) Graford formation) 1 fRanger series l Grindstone Creek member (of Ray sand 1 (subsurface) Millsap Lake formation)1 fRichland sandstone 1 fGunsight formation 1 Ricker Station limestone member Gwinnup sand 1 (subsurface) (of Grindstone Creek forma­ Hanna Valley bed (in Strawn tion)2 formation) 1 Rochelle conglomerate (in Gra­ Harris sand 1 (subsurface) ford formation) 1 Raymond formation 1 Hill Creek beds member (of Mill- Rockhill limestone (in Graford sap Lake formation) 1 formation) 1 Hodges sand J (subsurface) Rough Creek bed (in Strawn sandstone (in formation) 1 Mineral Wells formation) 1 fRough Creek shale member (of Horse Creek clay and shale (in Tesnus formation) 1 Strawn formation) 1 Salesville shale member (of Min­ Hudson Bridge limestone (in eral Wells formation) 1 Palo Pinto formation) 1 Sanders Bridge limestone (in Indian Creek bed (in Strawn Palo Pinto formation) 1 formation) 1 Santo limestone (in Millsap Lake fJacksboro formation 1 formation) 1 Jasper Creek shale (in Graford Seaman Ranch shale member formation) 1 (of Brad formation) 1 Keechi Creek shale and sandstone Shadrick Mill sandstone (in (in Mineral Wells formation) 1 Strawn formation) 1 Kickapoo Falls limestone (in South Bend sandstone and shale Millsap Lake formation) 1 (in Graham formation) 1 Kissinger sand l (subsurface) fSpeck Mountain clay (in Thrifty Lake sandstone J (subsurface) formation) l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 553

United States Continued United States Continued Texas Continued Texas Continued Pennsylvanian Continued Upper Pennsylvanian Continued Spring Creek bed (in Strawn Crystal Falls limestone member formation) 1 (of Thrifty formation); (as Stephens lime 1 (subsurface) member of Harpersville forma­ Steussy shale member (of Mill- tion J) sap Lake formation) 1 Curry clay 2 Swastika sand 1 (subsurface) Fincher sand J (subsurface) Tesnus formation 1 Gonzales limestone member (of Thurber sand 1 (subsurface) Graham formation)1 fTrickham bed (in Graham for­ Graford formation 1 mation) 1 Graham formation 1 Veale sand 1 (subsurface) Gunsight limestone member (of Ventioner bed (in Brad forma­ Graham formation) 1 tion) 1 fHarpersville formation l Village Bend limestone (in Min­ fHog Creek shale member (of eral Wells formation) 1 Caddo Creek formation) 1 fWaldrip bed 1 Home Creek limestone member fWaldrip division l (of Caddo Creek formation) 1 fWaldrip limestone member (of Ivan limestone member (of Gra­ Harpersville formation) 1 ham formation); (as member of White Ranch limestone (in Thrifty formation J) Graham formation) 1 Jacksboro limestone member (of Wilbarger Creek bed (in Strawn Graham formation) 1 formation) 1 Lohn shale member (of Thrifty Willow Point limestone (in Palo formation) 1 Pinto formation) 1 Merriman limestone member Wilmot J [sand] (subsurface) (of Graford formation) 1 Wizard Wells limestone (in Gra- North Leon limestone member ford formation) 1 (of Graham formation) 1 Wolf Mountain shale member Obregon formation 2 (in Graford formation) 1 Palo Pinto limestone x Upper Pennsylvanian Parks Mountain sandstone mem­ Adams Branch limestone mem­ ber (of Thrifty formation) 1 ber (of Graford formation) 1 Placid shale member (of Brad Avis sandstone member (of formation) J Graham formation); (as mem­ Quinn clay 2 ber of Thrifty formation :l) Ranger limestone member (of Belknap limestone member (of Brad formation) 1 Thrifty formation); (as mem­ Rocky Mound limestone member ber of Harpersville formation x) (of Graham formation) 1 Rough Mountain conglomerate Blach Ranch limestone member lentil (in Brownwood shale) 2 (of Thrifty formation) 1 Salem School limestone member Bluff Creek shale member (of (of Graham formation) 2 Graham formation) 1 Specks Mountain limestone Brad formation l member (of Thrifty forma­ Breckenridge limestone member tion) 1 (of Thrifty formation) 1 Staff limestone member (of Brownwood shale member (of Graford formation) 1 Graford formation) 1 Thrifty formation l Bunger limestone member (of Wayland shale member (of Graham formation) 1 Graham formation) 1 Caddo Creek formation 2 Whitt group 2 Canyon group l Wiles limestone member (of Graford formation) 1 Cedarton shale member (of Winchell limestone (as member Graford formation) 1 of Graford formation J) Chaffin limestone member (of Wynn limestone member (of Thrifty formation) 1 Palo Pinto formation) 2 Cisco group l Middle Pennsylvanian Colony Creek shale member (of Brazos River conglomerate mem­ Caddo Creek formation); (as ber (of Garner formation) 1 shale 2) Capps limestone member (of Craddock clay * Mineral Wells formation) 1 554 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Texas Continued Texas Continued Middle Pennsylvanian Continued Devonian Colony School conglomerate 2 Canutillo formation 2 East Mountain shale member Devonian(f) (of Mineral Wells formation) 1 Caballos novaculite : Garner formation 1 t Santiago chert * Gibson limestone member (of Upper(?) Devonian Grindstone Creek formation) 2 fZesch formation 2 Lake Pinto sandstone member Middle(f) and Upper Devonian (of Mineral Wells formation) 1 Ives breccia member (of Houy Millsap Lake formation 1 formation); (as breccia 2) (seep. 621) Mineral Wells formation 1 Middle Devonian Mingus shale member (of Garner Bear Spring formation 2 formation) J Lower or Middle Devonian Ricker sandstone member (of Stribling formation 2 Mineral Wells formation) 1 Lower Devonian Strawn group J Pillar Bluff limestone 2 Turkey Creek sandstone member (of Mineral Wells formation) 1 Silurian Lower and Middle Pennsylvanian Fusselman limestone * Bend group 1 Ordovidan Marble Falls limestone 1 El Pasan series 1 Smithwick shale ' Upper Ordovidan Lower Pennsylvanian Burnam limestone 2 Aylor member (of Big Saline Maravillas chert 1 formation) 2 Montoya limestone J Big Saline group 2 Montoyan series l Brister member (in Big Saline Gap shale or forma­ formation) 2 tion 2 Brook lentil (of Big Saline Upper Ordovidan(f) formation) 2 Solitario formation J Caddo Pool formation 2 (sub­ Middle Ordovidan surface) fBrewster formation 1 Comyn formation 2 (subsurface) Connell sandstone member (of De Leon formation 2 (subsurface) Oil Creek formation) 2 (sub­ Eastland Lake formation 2 (sub­ surface) surface) Fort Pefta formation 1 Gibbons conglomerate lentil (in McKee sandstone 2 (subsurface) Marble Falls formation) 2 Waddell sandstone 2 (subsurface) Kickapoo Creek group 2 Woods Hollow shale * Lampasas series 2 Lower Ordovidan Lemons Bluff member (of Marble Alsate shale 1 Falls formation) 2 Deep Creek division * Parks formation 2 (subsurface) Ellenburger group (as lime­ Rayville formation 2 stone !) Sipe Springs formation 2 (sub­ El Paso limestone l or formation surface) German formation 2 Sloan member (of Marble Falls Honeycut formation 2 formation) 2 Marathon limestone 1 Soldiers Hole member (of Big Monument Spring dolomite mem­ Saline formation) 2 ber (of Marathon limestone) 1 Mississippian Barnett shale 1 or formation Staendebach member (of Tan- Chappel formation * yard formation) 2 Espey Creek limestone member Tanyard formation 2 (of Chappel formation)2 Threadgill member (of Tanyard Helms formation 1 formation) 2 King Creek marl member (of Cambrian and Ordovidan Chappel formation) 2 Bliss sandstone 1 Whites Crossing coquina member Burnet marble 1 (of Chappel formation) 2 t Marathon series l Upper Mississippian Cambrian Las Cruces formation 2 Erna member (of Wilberns for­ Rancheria formation 2 mation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 555

United States Continued United States Continued Texas Continued Texas Continued Upper Cambrian or Lower Ordovi- Precambrian Continued cian Packsaddle schist l Beaver division l Red Bluff granite 2 Hinton division 1 Red Mountain gneiss 2 Hoover division J Sixmile granite 1 Wyo division 1 fTexan system J Upper Cambrian and Lower Ordo- Town Mountain granite J vician(f) Valley Spring gneiss l Leon series 1 Precambrian(?) Upper Cambrian Van Horn sandstone 1 Buttrill Ranch member (of Age(f) Dagger Flat formation)* fAltuda granite l Cap Mountain limestone mem­ Utah ber (of Riley formation); (as Recent formation J) Ice Springs Craters flow 2 Dagger Flat sandstone 1 Pleistocene Hickory sandstone * member (of Alpine formation 2 Riley formation) Bonneville formation 2 Katemcy series 1 group (as beds1) Lion Mountain sandstone mem Provo formation 2 her (of Riley formation); (as Pleistocene (?) member of Cap Mountain Salt Creek fanglomerate : formation x) Pleistocene, upper Morgan Creek limestone mem­ Tabernacle flow : ber (of Wilberns formation) Tertiary fPedernales dolomite member Bullion Canyon volcanics 2 (of Wilberns formation) 2 Crab Creek formation 2 Point Peak shale member (of Crazy Hollow formation 2 Wilberns formation) 2 Delano Peak latite member (of Point Rock shale member (of Bullion Canyon volcanics) 2 Wilberns formation) 2 Dry Hollow latite 2 Riley formation 2 Gray Gulch formation 8 fRiley series 1 Joe Lott tuff 2 Roberts Ranch member (of Dag­ Moroni formation 2 ger Flat formation) 2 Mount Belknap rhyolite 2 San Saba limestone member Orient granite porphyry 2 (of Wilberns formation); (as Oro Plata granite porphyry 2 series x) Roger Park basaltic breccia 2 Welge sandstone member (of fTintic andesite l Wilberns formation) 2 Tertiary, upper (?) Wilberns formation 1 Axtell formation * Precambrian Swansea quartz monzonite (as Allamoore limestone or forma­ rhyolite *) tion 2 Pliocene Bear Mountain granite 2 Barkers fanglomerate * Big Branch gneiss 2 Huntsville fanglomerate 2 fBodeville series J Pliocene(?) fBurnetan system * Cache Valley group 1 Carrizo Mountain schist 1 Malade Valley group l fClick series 1 Parunuweap formation 2 Coal Creek serpentine 2 fDiabolo sandstone * Probably Pliocene fFernandan system 1 Salt Lake formation : Hazel sandstone 1 or formation Pliocene, upper, or Pleistocene, lower Hye granite 2 Pavant flow 2 flron Mountain series 1 Sevier River formation 2 Lanoria quartzite 1 Pliocene, lower to middle Legion Creek granite 2 West Spring formation 2 Llano series 1 Miocene to Pliocene ' 'Lone Grove series 1 Collinston conglomerate 2 Long Mountain series 1 Miocene(f) "Mason series 1 Brian Head formation 2 Millicam formation 1 Miocene, middle to Oligocene(f) Oatman Creek granite 1 Jordan Narrows unit 2 556

United States Continued United States Continued Utah Continued Utah Continued Oligocene Paleocene Continued Duchesne formation 1 Mill conglomerate division Halfway horizon (in Duchesne (of Almy conglomerate) 2 River formation) 1 Valley Mountain facies (of Flag­ Lapoint horizon (in Duchesne staff formation) 2 River formation) 1 Willow Creek facies (of Flagstaff Norwood tuff 2 formation) 2 Randlett horizon (in Duchesne Paleocene, upper and lower Eocene(f) River formation) 1 Flagstaff limestone 1 Oligocene(f) Cretaceous and (or) Eocene Fool Creek conglomerate 2 Claron limestone l Oligocene(?) to Pliocene(f) Cretaceous Camp Williams unit 2 Foxian series l Oligocene, lower t Pinto sandstone J Park City volcanics 2 Upper Cretaceous or Tertiary, lower Post-Eocene fAlta granodiorite 1 fSunbeam monzonite 1 t Clay ton Peak quartz diorite 1 Post-Eocene(f) fLittle Cottonwood granite 1 Fernow rhyolite 1 Upper Cretaceous and Paleocene Eocene or Oligocene North Horn formation 2 Duchesne River formation 1 Upper Cretaceous Eocene Aberdeen sandstone member (of Godiva limestone 1 ; see also Blackhawk formation) 1 Goldiva limestone 1 Alien Valley shale 2 Goldens Ranch formation 2 Asphalt Ridge sandstone 2 fManti beds 1 Bearian series 1 Packard quartz latite (as rhyolite J) Blackhawk formation 1 fPink Cliff series J Bluecastle sandstone member (of fRaddatz porphyry 1 Price River formation) west of fVermilion Creek group 1 Green River; member (of .Eocene (?) Neslen formation) east of Eagle Hill rhyolite * Green River; (as bed *) Shaggy Peak rhyolite l Blue Gate sandstone member (of Tickville rhyolite l Mancos shale) l ; sometimes White Sage formation 1 shale member Eocene, upper, or Oligocene Bob Wright coal group 1 Bald Knoll formation 2 Brownian series x Eocene, upper Buck tongue (of Mancos shale) 1 Myton member 1 (of Uinta fCastlegate coal group (in Black- formation) 1 hawk formation) * Eocene, middle or upper Castlegate sandstone member (of Sage Valley limestone member (of Price River formation) 1 Goldens Ranch formation) 2 2 Eocene, middle Cedar Mountain group 2 Evacuation Creek member (of Desert member (of Blackhawk Green River formation) 1 formation) 2 Horse Bench sandstone bed (in Emery sandstone member (of Evacuation Creek member of Mancos shale) J Green River formation) 1 Farrer formation (as non-coal- Eocene, lower bearing member of Price River Cotton formation 2 formation *) Wasatch group 1 or formation 1 Wasatchan series 1 Ferron sandstone member (of Paleocene or Eocene, lower Mancos shale) 1 Cowly Canyon limestone mem­ Funk Valley formation 2 ber (of Wasatch group) 2 Garley Canyon sandstone mem­ Paleocene ber (of Mancos shale) 1 Fayette facies (of Flagstaff for­ Grassy member (of Blackhawk mation) 2 formation) * Joes Valley member (of North Henefer formation 2 Horn formation) 2 Hinshaw sandstone * Pulpit conglomerate division (of Indianola formation 2 or group 2 Almy,,conglomerate) 2 Eaiparowits formation : INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 557

United States Continued United States Continued Utah Continued Utah Continued Upper Cretaceous^ Continued Jurassic(f) Kelvin formation (as conglomer­ Cedar City tongue (of Kayenta ate ») formation) 2 Kenilworth member (of Black- fColob sandstone 1 hawk formation) 2 fGray Cliff group 1 Masuk member (of Mancos Tenney Canyon tongue (of Kay­ shale); (as sandstone member enta formation) 2 of Mesaverde formation x) f White Cliff sandstone or group 1 fMasuk shale (in Mancos shale) * fWhite Wall sandstone 1 Masukian series 1 Upper Jurassic and Upper Creta­ Neslen formation (as coal-bearing ceous member of Price River forma­ Henryan series 1 tion ») fHenrys Ford group 1 Panther tongue (of Star Point Upper Jurassic sandstone) 1 Arapien shale 2 fPennell sandstone 1 Bishop sandstone 1 Price River formation > Bluff sandstone (as member of Rim Rock sandstone 2 Morrison formation l) Rockport formation 1 Brush formation 1 Sanpete formation 2 Brushy Basin shale member (of Sego sandstone (as member of Morrison formation) J Price River formation J) 1 Sixmile Canyon formation 2 Duchesne limestone * South Flat formation 2 1 fSpring Canyon coal group (in fFlaming Gorge group 1 Blackhawk formation) 1 Junction limestone J Spring Canyon tongue (of Star Moab sandstone member or Point sandstone) 1 tongue (of Entrada sandstone) 1 Star Point sandstone 1 Recapture shale member (of Storrs tongue (of Star Point Morrison formation) l sandstone) 1 Red Mesa member (of Entrada Straight Cliffs sandstone l formation) 2 Sulphur Canyon sandstone bed Salt Wash sandstone member (in Price River formation) 1 (of Morrison formation) 1 Sunnyside member (of Black- : hawk formation) 2 Twelvemile Canyon member (of Thompson Canyon sandstone bed Arapien shale) 2 (in Price River formation) 1 Twist Gulch member (of Arapien Tropic shale 1 shale) 2 Tununkian series 1 Westwater Canyon sandstone Tununk shale (in Mancos shale) 1 ; member (of Morrison forma­ fsandstone member (of Mancos tion) 1 shale) 1 t White Cliff limestone l Tuscher formation 1 Winsor formation 2 Wanship formation 2 Middle and Upper Jurassic 1 Wahweap sandstone 1 San Rafael group 1 Upper Cretaceous(f) Triassic and Jurassic Currant Creek formation * Glen Canyon group 1 Iron Springs formation 2 fKanab sandstone l Marshall Creek breccia 2 Triassic Lower Cretaceous(f) Ankareh shale l , formation, or Buckhorn conglomerate 2 redbeds Jurassic Mahogany member (of Ankareh Homestake limestone 1 member formation) 2 (of Carmel formation) Shinarump clay l Jurassic and Jurassic(?) fShinarump group 1 Lamb Point tongue (of Navajo Shinarumpian series 1 sandstone) 2 Triassic(f) Shurtz sandstone tongue (of Hoskinnini tongue or member Navajo sandstone) 2 (of Moenkopi formation); (as Temple Cap member (of Navajo tongue or member of Cutler sandstone) 2 formation !) 558 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States, Continued Utah Continued Utah Continued Upper Triassic Permian Continued Duffin sandstone and shale (in Halgaito tongue or member (of Chinle formation) 2 Cutler formation) 1 Fire bentonitic shale Harrisburg gypsiferous member (in Chinle formation) 2 (of ) l Gartra grit member (of Stanaker Kirkman limestone 2 formation) 2 Little Loop oil sand 1 (subsurface) Hartley shale and sandstone (in Mackentire "red-beds" tongue Chinle formation) 2 (of Phosphoria formation) 2 Leeds sandstone (in Silver Reef Mendenhall sand 1 (subsurface) sandstone member of Chinle t Monument Valley shale J formation) 2 Organ Rock tongue or member Moss Back member (of Chinle (of Cutler formation) 1 formation) 2 Park City formation l or group Petrified Forest member (of fShafer limestone 1 Chinle formation) 2 White Rim sandstone member Shinarump member (of Chinle (of Cutler formation) 1 formation); (as conglomerate1) Post-Pennsylvanian tSilver Reef sandstone 1 Last Chance quartz monzonite * Stanaker formation 2 Carboniferous Suicide grit 2 Heber limestone J Tecumseh sandstone (in Silver Oquirrh quartzite 1 Reef sandstone member of Park sandstone 1 Chinle formation) 2 fWeberan series 1 Trail Hill sandstone (in Chinle Carboniferous(?) formation) 2 Phelan limestone 2 tVermilion Cliff group 1 Vipont limestone 2 Upper^ Triassic(f) Wardlaw shale 2 Springdale sandstone member Pennsylvanian or Permian (of Moenave formation) 2 Arcola sand 1 (subsurface) Lower Triassic Pennsylvanian and Permian Emigration formation l fGopdridge formation 1 Harrington formation 1 Oquirrh formation 1 Pinecrest formation 1 Pennsylvanian Red Wash formation 2 Amber sand * (subsurface) Shnabkaib shale member (of Argenta limestone 1 Moenkopi formation) 1 or mem­ Bingham quartzite ' ber (of Moenkopi formation) Bullard limestone * Sinbad limestone member (of Butterfleld limestone member Moenkopi formation) 1 (of Bingham quartzite) 1 Thaynes limestone 1, formation, Columbus quartzite J or group Commercial limestone member Timpoweap member (of Moen­ (of Bingham quartzite) 1 kopi formation) 2 Elephant limestone 1 Virgin limestone member (of Galena King limestone 1 Moenkopi formation) 1 Goose Neck sand 1 (subsurface) fVerkin shales 1 Hercules limestone l Woodside formation (as shale J) Highland Boy limestone member Paleozoic (of Bingham quartzite) 1 Allah quartzite 2 Hobble formation J Orient formation 2 Honaker sand 1 (subsurface) Permian and Triassic Honerine limestone l fOljeto sandstone member l (of Jordan limestone member (of Moenkopi formation) Bingham quartzite) 1 Permian Kelly formation 2 Baby sand 1 (subsurface) Lenpx limestone member (of fBogus tongue (of Cutler for­ Bingham quartzite) 1 mation) 1 Maverick limestone 1 Morgan formation l Cedar Mesa sandstone member North Ada limestone 1 (of Cutler formation)' fOntario quartzite J Diamond Creek sandstone 1 Parnell limestone 1 Gerster formation 1 or limestone fPetro limestone lentil (of Bing­ Goodridge sand 1 (subsurface) ham quartzite) 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 559

United States Continued United States Continued Utah Continued Utah Continued Pennsylvanian Continued Upper Devonian Phoenix limestone lentil (of Aneth formation 2 (subsurface) Bingham quartzite) 1 City Creek limestone 2 fRambler formation 1 Hades quartzite l Round Valley limestone 2 McCracken member (of Elbert Tilden limestone lentil (of Bing­ formation) 2 (subsurface) ham quartzite) 1 Mowitza shale ] Utah Metals limestone 1 Victoria formation (as quartz­ Weber conglomerate 1 ite J) Weber quartzite 1, sandstone, Middle Devonian formation, or shale Guilmette formation * Yampa limestone lentil (of Bing­ Sevy dolomite 1 ham quartzite) 1 Simonson dolomite l fYampa sandstone ! Lower Devonian Pennsylvanian (?) Water Canyon formation 2 Talisman quartzite ' Silurian jMisstssippzan Dora member (of Bluebell for­ fHumbug limestone 1 mation) 2 Mississippian and Devonian(f) Laketown dolomite 1 Topache limestone 1 Noah member (of Bluebell for­ Upper Mississippian and Pennsyl­ mation) 2 vanian fParadise limestone l Manning Canyon shale 1 Silurian(?) and Devonian(?) Upper Mississippian Red Warrior limestone 1 Brazer limestone 1, dolomite, or Middle Silurian group dolomite 2 Deseret limestone l Harrisite dolomite 2 Doughnut formation 2 Lost Sheep dolomite 2 fGarber limestone 1 Thursday dolomite 2 JGold Ledge porphyry 1 Ordovician to Mississippian Great Blue limestone * or for­ fGodiva limestone 1 mation fWasatch limestone 1 Herat shale member (of Ochre Ordovician Mountain limestone) 1 Chief Consolidated limestone 1 Humbug formation 1 Gemini limestone 1 Humbug sandstone 1 Lion Hill formation J Ordovician and Cambrian(?) Long Trail shale member (of Grampian limestone 1 Great Blue formation) 1 Upper Ordovician, Silurian, and Ochre Mountain limestone 1 Devonian Mono limestone 1 Bluebell dolomite 1 fPine Canyon limestone 1 Upper Ordovician and Silurian Reed formation 1 Beecher member (of Bluebell fSilver Ledge porphyry 1 formation) 2 Tetro member (of Deseret lime­ Upper Ordovician and (or) Silurian stone) ; (as limestone x) Floride dolomite 2 Utah Queen formation 1 Upper Ordovician Woodman formation 1 Eagle member (of Bluebell for­ Lower and Upper (?) Mississippian Benson limestone 1 mation) 2 Lower Mississippian Middle Ordovician fBuckhorn limestone 1 Swan Peak formation (as quartz­ Hidden Treasure limestone 1 ite J) Leatham formation 2 Lower Ordovician Midridge limestone 2 Box Elder limestone 1 Devonian Fillmore limestone 2 Becks limestone 2 Garden City formation (as lime­ Beirdneau sandstone member (of stone J) Jefferson formation) 2 fGeneva quartzite 1 Hyrum dolomite member (of House limestone 2 Jefferson formation) 2 Juab limestone 2 Upper Devonian and Mississippian Kanosh shale 2 t Gardner dolomite » Opohonga limestone1 Pinyon Peak limestone 1 Wahwah limestone 2 560 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Utah Continued Utah Continued Cambrian and Lower Ordovician Lower and Middle Cambrian fEureka limestone l fAlta shale 1 f Mammoth limestone 1 fOgden quartzite l Cambrian Ophir formation : or shale Busby quartzite member (of fTintic slate 1 Langston formation) 2 Lower Cambrian Butlerville quartzite J Barkley quartzite * Dagmar limestone member (of Busby quartzite : Ute formation) 2 Cabin shale 1 Holliday shale 1 Dale quartzites l t Milliard limestone 1 fRobinson quartzite > Naomi Peak limestone member Tatow limestone 2 (of Langston formation) 2 Uintan series J Opex formation (as dolomite J) Lower Cambrian and Precam- Pine Valley quartzite 2 brian(f) Timpanogos shales 1 Tintic quartzite 1 Cambrian(?) Precambrian Morehouse quartzite 1 Bald Mountain formation 2 Sentinell limestone 2 Big Cottonwood formation (as Sentinell quartzite 2 quartzite series x) Upper Cambrian and Ordovician(f) Box Canyon member (of Mutual Chokecherry dolomite 1 quartzite) 2 Upper Cambrian Cottonwood schists and gneisses J Ajax dolomite (as limestone x) Emmpns Peak quartzite 1 Emerald member (of Ajax dolo­ Farmington Canyon complex J mite) 1 Little Willow series 2 Hicks formation 1 Mineral Fork tillite 2 Lamb dolomite * Mutual formation 2 Notch Peak limestone 1 Red Creek quartzite 1 Orr formation 1 Red Pine shale 2 Weeks limestone l fUinta quartzite and sandstone * Upper and Middle(f) Cambrian Uinta Mountain group : Lynch dolomite 1 Vermont Middle Cambrian to Lower Ordovi­ Eocene cian Brandon lignite l Centennial limestone * Paleozoic Middle and Upper (?) Cambrian Belvidere Mountain amphibolite 1 Maxfield limestone ] Lowell Mountain formation J Middle Cambrian Upper Paleozoic Abercrombie formation 1 Plymouth granite 1 limestone l Carboniferous Bluebird dolomite 1 Mount Ascutney granite * Bowman limestone 1 Devonian Cole Canyon dolomite l Barre granite J Dagmar limestone l Bethel granite 1 Dome Canyon limestone 1 Calais granite l Golden Ray limestone 1 Craftsbury granite l Hartmann limestone 1 Groton granite * Herkimer limestone * Hardwick granite 1 Hodges shale member (of Bloom- Irasburg granite 1 ington formation) 1 Newark granite 1 Howell formation * Newport granite J Landston formation J Orange granite l Marjum limestone 1 Pomfret granite 1 Millard limestone 2 Randolph granite 1 Swasey formation 1 Ryegate granite 1 Teutonic limestone 1 Tunbridge granite l Trippe limestone 1 Vernon limestone 1 Ute limestone 1 West Dummerston granite l Wheeler formation 1 Williamstown granite x Young Peak dolomite 1 Woqdbury granite 1 Middle and Lower(?} Cambrian Devonian and Silurian(f) Brigham quartzite l Gile Mountain formation 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 561

United States Continued United States Continued Vermont Continued Vermont Continued Upper or post-Devonian Middle Ordovician Continued Durkee Hill greenstones * Shoreham member (of Sherman Upper Devonian(f) Fall formation) * Brocklebank granite * Sudbury marble 1 Silurian(f) and Devonian(?) West Rutland marble l Waits River formation (as lime­ Weybridge member (of Beldens stone l) formation) 2 Silurian or Lower Devonian Whipple member (of Berkshire Westmore formation z schist) 2 Silurian Youngman formation 2 Barton River formation ! Middle Ordovician(f) Silurian(f) Meetinghouse slate 2 Guilford slate * Standing Pond volcanics 2 Middle Silurian Lower or Middle Ordovician Northfield slate l Walloomsac slate ' Middle or Lower(f) Silurian Lower and Middle Ordovician Shaw Mountain formation 2 Highgate Springs series 1 Post-Ordovician Isle La Motte marble 1 Bellows Falls granite gneiss 1 Lower Ordovician Ordovician (see also Cambrian and Albany conglomerate * Ordovician) Boardman formation s Bascom formation * Bridport dolomite 2 fBradford schist l Cassin formation x Brattleboro phyllite l Corliss conglomerate ' Columbian marble l Coventry conglomerate x Coventry limestone 1 Cutting dolomite 2 Fairlee quartz monzonite (as Fort Cassin formation x granite gneiss l) Georgia slate ' Memphremagog slate l Grandge slate 2 fMontpelier slate 1 Ira slate ' Moretown formation * Isle La Motte sandstone l Morgan Corners formation l Monastery formation l Orleans phyllite 1 Morses Line slate 2 Vershire schist l Northfield conglomerate * f Washington limestone ' Poultney slate ' Woodstock schist * Province Island limestone 2 Ordovician and Cambrian(?) Shelburne marble * Stowe formation * Sutherland Falls marble * Ordovician(?) Wing conglomerate l Irasburg conglomerate 1 Cambrian or Lower Ordovician Waterford slate l Turkey Mountain member (of Upper Ordovician(?) Hoosac formation) (J. B. Bird Mountain grit l Thompson, Jr., 1952, Geol. Middle Ordovician to Upper Soc. America Guidebook for Devonian field trips in New England, p. Vermont sequence * 41) Middle Ordovician Cambrian and Ordovician Addison formation * Dorset limestone l Beldens formation * fEolian limestone l Burchards limestone 2 Grahamville formation 2 Carman quartzite * Whetstone Hill member (of More- Chipman group * town formation)* Cram Hill formation * Cambrian Harlow Bridge quartzite member Barnard gneiss 1 (of Cram Hill formation) 2 Newbury granite gneiss l Hortonville slate 1 Ottauquechee formation 1 Hyde Manor limestone l Cambrian(?) Larrabee member (of Glens Falls Pico Peak series 2 formation) * Plymouth Union series * Maquam group ! Springfield conglomerate * Middlebury limestone * Upper Cambrian Orwell limestone 2 Bethel group * Randolph phyllite l Bethel schist 1 562 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Vermont Continued Vermont Continued Upper Cambrian Continued Lower Cambrian Continued Cavendish schist l Stiles phyllite 1 Clarendon Springs dolomite ' fSwanton marble l Gorge formation 1 fSwanton slate 1 Hungerford formation 2 Tyson member (of Monastery Lunenburg schist * formation) * Milton dolomite l fVermont formation l or quartz­ fMissisquoi formation * ite 1 Reading gneiss 1 Wallace Ledge formation * Rockledge limestone breccia * Wallingford dolomite 1 Russell slate * Winooski marble 1 Saxe Brook formation 8 Zion Hill quartzite l Williston limestone l Lower Cambrian(?) Upper Canibrian(?) Brackett member (of Stowe for­ Gassetts schist 1 mation) * Halifax chlprite schist * Sherman marble * Heartwellville schist l Precambrian Highgate slate 1 Forestdale marble 1 Missisquoi schist l Green Mountain gneiss l Readsboro schist * Harmon Hill gneiss * Whittingham schist l Lana conglomerate 1 Middle or Upper Cambrian Lana shale l Skeels Corners formation 2 Mendon dolomite l Middle Cambrian Mendon schist l Boucher formation ! Moosalamoo phyllite 1 Mill River conglomerate 1 Mount Holly gneiss 1 St. Albans slate 1 Nickwaket graywacke 1 Middle(?) Cambrian Ripton conglomerate * Rugg Brook dolomite conglom­ Rochester quartzite * erate l Romance arkose * Lower Cambrian to Lower Ordo- Saltash formation ! vician Stamford granite gneiss * fSwanton conglomerate l Westford schist ! Lower Cambrian Wilcox formation ! Barker quartzite 1 fWoodford gneiss 1 Battell member (of Monastery Precambrian(f) formation) 8 East Mountain schist * Beebe limestone l Fairfax schist * Bennington quartzite 1 Bomoseen grit l Averill granite ' Brezee phyllite 1 Beadle Green granite l Brigham Hill graywacke * Black Mountain granite * Bull slate 1 gneiss 1 tColchester formation 1 Kirby granite l Connor facies (of Dunham dolo­ Knox Mountain granite l mite) 2 Roll Quarry limestone l Danby formation > Virginia fGeorgian epoch or series 1 Pleistocene Granville formation 2 fDismal Swamp formation l Hancock member (of Pinney f Franconia gravel 1 Hollow formation) 2 Princess Anne formation ' Hooker slate 1 Pleistocene or Pliocene(?) Hubbardton slate 1 fAppomattox formation l Mallet dolomite l t Norfolk formation l Monastery formation * Monkton quartzite 1 Miocene Noah Parker horizon l Bermuda earth * Parker slate l fRichmond earth 1 Pine Hill quartzite * fVirginian * [deposits] Pinney Hollow schist l Miocene, upper Plymouth conglomerate l Yorktown formation 1 Plymouth marble l Eocene, upper Rutland dolomite 1 Chickahominy formation 2 (sub­ Sherburne conglomerate 1 surface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 563

United States Continued United States Continued Virginia Continued Virginia Continued Eocene, lower and middle Mississippian Continued Pamunkey group 1 Cloyd conglomerate member (of Woodstock greensand marl mem­ ) 2 ber (of Nanjemoy formation) 1 Falls Mills limestone (in Hinton Eocene, lower formation) * Aquia formation 1 or greensand Falls Mills sandstone (in Hinton Paspotansa greensand marl formation) 1 member (of Aquia formation) ' Falls Mills shale (in Hinton for­ Lower Cretaceous mation) l ' Aquia Creek series 1 Graham limestone (in Bluefield ' Brooke formation * formation) 1 Fredericksburg sandstone 1 Graham sandstone (in Bluefield ' James River series 1 formation) 1 Mount Vernon series 1 Graham shale (in Bluefield for­ ' Rappahannock series l mation) l Upper Triassic fMontgomery buhr, grits, .or fBorder conglomerate 1 sandstone 1 Boscabel boulder beds 1 Mud sandstone (in Bluestone Bull Run shales l formation) * Chesterfield group 1 Mud shale (in Bluestone forma­ Otterdale sandstones * tion) i Tuckahoe group * fPulaski shale ' Vinita beds l Upper Mississippian Paleozoic(f) * Arch marble 2 fCove Creek limestone 1 Archer Creek formation 2 fFido sandstone 1 Candler formation 2 ' Evington group 2 Little Valley limestone * Joshua schist 2 Maccrady shale l Max Meadows fault breccia ! Pennington shale,1 formation, or Mount Athos formation 1 group Pelier schist 2 Lower Mississippian Slippery Creek greenstone 2 Price sandstone l, formation, or Upper Paleozoic siltstone Petersburg granite 1 Upper Devonian and Lower Missis­ Pennsylvanian sippian Dismal conglomerate lentil (in Big Stone Gap shale 1 Dismal formation) * Upper Devonian Dismal formation > Hilton shale member (of Portage Panther conglomerate l formation) * fPocahontas group l Jennings formation l Pocahontas sandstone 1 Kimberling shale ' Middle Pennsylvanian Walker shale 1 Addington sandstone member Middle and Upper Devonian (of Wise formation) 1 Millboro shale 2 Gladeville sandstone 1 Lower Devonian McClure sandstone member (of Clifton Forge sandstone member Norton formation) 1 (of Keyser limestone) 1 Norton formation 1 Craigsville limestone 1 Wise formation l Healing Springs sandstone mem­ Lower and Middle Pennsylvanian ber (of New Scotland lime­ Lee formation 1 or group stone) 1 Lower Pennsylvanian Longdale limestone * Bald Rock conglomerate member fMonterey sandstone l (of Lee formation) 1 Rocky Gap sandstone l l Saltville chert l Sequoyah formation 1 Silurian or younger Tellowa formation * Bremo quartzite 2 Silurian and Lower Devonian Bent limestone (in Bluestone for­ Giles formation 1 mation) l Silurian Broad Ford sandstone (in Pocono Crabbottom sandstone (in Wills sandstone) * Creek formation) 2

504835 5S 564 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Virginia Continued Virginia Continued Silurian Continued Middle Ordovician -Continued flngles conglomerate member J Tumbez limestone 2 (of Price formation) Walker Mountain sandstone Middle Silurian (of ) Cacapon sandstone member (of (Charles Butts and R. S. Ed- Clinton formation) * mundson, 1943, Geol. Soc. Iron Gate facies (of Clinton for­ America Bull., v. 54, no. 11, mation) 2 p. 1678) Lower Silurian Ward Cove limestone member Hagen shale member (of Clinch (of Cliffield formation)* sandstone) 2 Wardell formation 2 Poor Valley Ridge member (of Whistle Creek limestone 2 Clinch sandstone) 2 Witten limestone 2 Post-Ordovician Woodway limestone * Stafford Store quartz monzonite * Lower and Middle(?) Ordovician Upper Ordovician and Silurian Pearisburg limestone 1 fMassanutten sandstone l Lower Ordovician Upper Ordovician Draper dolomite member (of Arvonia slate 1 Nittany formation) 2 House Mountain shales 1 Everona limestone' Quantico slate 1 fLiberty Hall limestone * Middle Ordovician JMurat limestone * Benbolt limestone 2 Narrows chert (in Beekmantown Ben Hur limestone * limestone) 1 2 Oglesby marble member (of Bolarian series 2 Nittany formation)* Botetourt limestone member (of Cambrian ) 2 Mechunck limestone 1 2 Oronoco formation 3 Burkes Garden limestone mem­ Upper Cambrian ber (of Benbolt limestone) 2 Chances Branch dolomite mem­ Cliffield formation 2 ber (of Maynardville lime­ Collierstown limestone 2 stone) 2 Dot limestone 2 Low Hollow limestone member Edinburg formation 2 (of Maynardville limestone) 2 Effna limestone 2 Middle and Upper Cambrian Eggleston limestone 1 fNatural Bridge limestone 1 Elway limestone 2 Middle Cambrian Five Oaks limestone member (of Honaker limestone or dolomite ' Cliffield formation) 2 Lower and Middle Cambrian Gratton limestone 2 tBuena Vista shale 1 Hardy Creek limestone 2 Graysonton formation * Hurricane Bridge limestone 2 t Russell formation * Lantz Mills facies (of Edinburg Lower Cambrian formation) 2 Austinville dolomite member (of Lexington limestone l Shady dolomite)2 Lincolnshire limestone 2 Ivanhoe limestone member (of Martin Creek limestone * Rome formation); (as member Moccasin limestone l or forma­ of Shady dolomite x) tion Loudoun formation l New Market limestone 2 Patterson limestone member (of Oranda formation 2 Shady dolomite) 1 Peery limestone member (of fSherwood limestone 1 Cliffield formation) 2 Snowden member (of Harpers Poteet limestone 2 formation) 2 Rob Camp limestone 2 Precambrian Rockdell limestone 2 Abbyville gabbro l St. Glair facies (of Murfreesboro Air Point granite l formation) 2 Amelia-Goochland quartz mon­ St. Luke limestone member (of zonite gneiss l Edinburg formation) 2 Buffalo granite * Shannondale limestone member Carsonville granite 2 (of Benbolt limestone) 2 Cartersville granite * Thompson Valley limestone 2 fColumbia granite 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 565

United States Continued United States Continued Virginia Continued Washington Continued Precambrian Continued Recent Crest Hill granite 2 Colwood formation * Elk HU1 complex 1 Pleistocene Fauquier formation * Admiralty dirft * or clay Fredericksburg gneiss 1 Arlington gravel member (of Fredericksburg granite 1 Vashon drift) 2 Goshen schist 1 Cowiche gravel 1 Grayson granodiorite gneiss (as fDouty gravel 1 granite gneiss 1) Esperance sand member (of Hyco quartz porphyry 1 Vashon drift) 2 Leatherwood granite ' Gale sand' 1 Locust Grove diorite * Logan Hill formation 2 Locust Grove granite 1 Marysville sand member (of Lovingston granite gneiss l Vashon drift) 2 Lynchburg gneiss l Midland sand * Marshall granite 1 Nespelem silt 1 Melrose granite facies (of Colum­ Okanogan l (till) bia granite) 1 Orting drift (as gravel ') Moneta biotite - hornblende Osceola clay 1 gneiss ! fOsceola glacial drift 1 Monticello rhyolites 1 Palouse formation 1 Monticello schist * Pilchuck clay member (of Vashon Mount Athos greenstone l drift) 2 Occoquan granite l Puyallup formation (as sand !) Old Rag granite 1 Queets beds 2 Pedlar formation 2 Ringold formation l Redoak granite ' Satsop formation 1 Rockfish conglomerate l Steilacoom gravel ' Roseland anorthosite 2 Stillaquamish sand member (of Schuyler soapstone > Vashon drift) 2 Shelton granite gneiss l Taholah formation 2 Somerville granite * Tieton andesite 1 State Farm gneiss 2 Tiflis member (of Wahluke for­ Striped Rock granite * mation) 2 * Touchet beds 2 Virgilina group, volcanic group, Vashon drift * or greenstone l Wahluke formation ! Warrenton agglomerate member Willapa clays ! (of Catoctin series) * Tertiary Precambrian(?) Camas basalt * Neabsco Run diorite * Cathedral granite l Point Lookout granite * Cloudy Pass diorite * Age(?) Tiger formation 2 Charlottesville formation 2 Tertiary (f) East Waynesboro formation * Palmer volcanics * Esmont slate facies (of Candler Phalen Lake volcanics 1 formation) 2 Underwood lava 1 Flat Rock Creek granite 2 Tertiary, upper (f) Johnson Mill graphite schist 2 Pend Oreille Valley andesite ! Lydia granodiorite 2 Pre- Tertiar y Mount Jefferson sandstone mem­ Mount Stuart granodiorite ' ber (of Rockfish conglomer­ Peshastin formation 1 ate) * Pre-Tertiar y(f) fSheep Rock conglomerate * Newaukum series 1 Swannanoa formation 2 Pliocene Washington Quinalt formation ' Quaternary Soleduck formation * Dogs Head andesites * Pliocene(f) Drumheller silts 2 Hoko formation l Glacier Peak volcanics * Howson andesite ' Goat Rock pyroclastic deposits 2 Raft River formation l lava 1 Miocene or Pliocene lavas l Snipes conglomerates 2 Mount St. Helens lavas 2 Sugarloaf andesite 2 566 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Washington Continued Washington Continued Miocene or Pliocene Continued Eocene to Miocene Summit conglomerate 2 Keechelus andesite series 1 Miocene and Pliocene Twin River formation 1 Elephant Mountain flow 2 Eocene Selah Butte flow 2 Bayne series l Skamania andesite series 2 Bellingham beds 1 Miocene Burnett formation l Browns Point formation 3 Carbonado formation 1 Clallam formation 1 Carbon River (coal) series 1 Eagle Creek formation 1 Chehalis sandstone l Fifes Peak andesite 2 Evans Creek coal series * Hammer Bluff formation l Fairfax * (coal bearing rocks) Selah tuff member (of Ellensburg Franklin sandstone l formation) 2 Franklin series l Silver Star granodiorite 2 Guye formation 1 Squaw Creek diatomite member Kachess rhyolite l (of Yakima basalt) 2 Knob Hill andesite 2 Taneum andesite 1 fKittitas system l Miocene and Oligocene(f) Kummer sandstone l Hoh formation ! Kummer series 1 Miocene(f) Lyre formation 2 Howard arkose 1 Manastash formation 1 Quillayute formation l Melmont * (coal bearing rocks) Miocene, upper, and Pliocene, lower Naches formation ' Ellensburg formation l Natapoc formation * Miocene, upper Olequa formation 1 Enumclaw volcanic series 1 fPittsburg formation l Douglas Canyon formation * Puget group 1 Lake Vantage lavas 2 Puyer formation 1 Montesano formation 1 Roslyn formation ' Miocene, middle or upper South Prairie formation l Latah formation 1 Sumas shales (in Chuckanut Miocene, lower and middle formation) 2 Yakima basalt 1 member (of Swauk formation l Columbia River basalt) Teanaway basalt 1 Miocene, lower Wilkeson [coal] series l Chehalis formation * Wiikeson formation 1 Wahkiakim formation 1 Eocene (?) Wenas basalt l Pipestone Canyon formation 3 Oligocene Eocene, upper Blakeley formation * Cowlitz formation ' Gerome andesite 1 Northcraft formation 2 Lincoln formation * Olequa Creek member (of Cow­ Marrowstone shale 2 litz formation) 2 Porter shale * Pe Ell volcanics member (of Restoration Point horizon * Cowlitz formation) 2 Seattle formation 1 Skookumchuck formation 2 Oligocene (?) Stillwater Creek member (of Snoqualmie granodiorite l Cowlitz formation) 2 Oligocene, middle Eocene, middle to upper Orchard Point conglomerate Mclntosh formation 2 member (of Blakeley forma­ Eocene, middle and lower(?) tion) 2 Crescent formation ' Oligocene, lower Eocene, lower Gries Ranch formation (as hori­ Chuckanut formation l zon J); see also Greece Ranch Mesozoic horizon 1 Kruger Mountain malignite * Quimper sandstone ! granodiorite 2 Townsend shale 2 Cretaceous Eocene or Miocene Cle Elum formation 2 West Index andesitic series 1 Winthrop sandstone ! INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 567

United States Continued United States Continued Washington Continued Washington Continued Cretaceous (?) Pennsylvanian and (or) Permian Bogachiel formation 1 Granite Falls limestone 2 Loon Lake granite 1 Devonian and Carboniferous Soleduck formation 1 San Juan series l Probably Cretaceous Probably Devonian, Carboniferous, fColville granite * or granodio- and Mesozoic rite 1 Covada group l Upper Cretaceous Upper and Middle(f) Devonian and Midnight Peak formation 2 JVi. ississippian Lower and Middle Cretaceous Orcas group 1 Virginian Ridge formation 2 Ordovician Lower Cretaceous Ledbetter slate 2 Pasayten formation 1 Maloney metamorphic series 1 tSimilkameen formation * Pre-Ordovician^f) or Carboniferous(f) Spieden formation 1 Easton schist 1 Jurassic Pre-Ordovician Tye granite 1 Chiwaukim schist 2 Jurassic(f) Swakane gneiss ! Eagle Cliff porphyrite l Pre-Ordovician (?) Index granodiorite l Buckskin schist 2 Meteor granodiorite 1 Fernow gneiss 2 Osoyoos granodiorite 1 Martin Ridge schist 2 Remmel granodiorite * Cambrian Gypsy quartzite 2 Upper Jurassic Middle Cambrian Shuksan formation 2 Metaline limestone or formation2 Turtleback complex * Northport limestone l Upper Jurassic(f) Lower or Middle Cambrian Chelan granodiorite * Maitlen phyllite 2 Pre-Jurassic Lower Cambrian Hawkins formation l Addy quartzite l Triassic(f) Precambrian Fidalgo formation l Bead Lake formation 2 Newby formation 2 Buffalo Hump formation 2 Ventura formation l Deer Trail group (as argillite l) Upper Triassic Edna dolomite 2 Haro formation 1 Huckleberry formation (based Paleozoic on Huckleberry conglomerate 2 Ghewalah argillite > and Huckleberry greenstone 2) Colville quartzite * Leola volcanics 2 Deer Lake argillite 1 McHale slate 2 Eagle Mountain quartzite l Moon Hill quartzite member (of Old Dominion limestone 1 Skookum formation) 2 Paleozoic(f) Newport group 2 Boundary argillites 1 No Name argillite 2 Cedar Creek argillite * Shedroof conglomerate 2 Clugston limestone 1 Skookum formation 2 Deep Lake argillite l Stensgar dolomite (as dolomite Fish Creek argillite * member 1) Lead Point argillite 1 Togo formation 2 Mission argillite 1 Precambrian(f) Red Top limestone l Marshall diorite 2 Republican Creek limestone * Orient gneiss l Stevens series * Ribbon gneiss 1 Upper Paleozoic or Mesozoic Jumbo volcanics 1 Carson lava 1 Sheep Creek conglomerate 1 Leecher metamorphics 2 Carboniferous Methow gneiss 2 Hozomeen series * West Virginia Leech River group * Pleistocene Carboniferous (?) Barboursville silts 2 Chopaka basic intrusives ' Teay formation 1 Chopaka schist 1 Pliocene(?) Gunn Peak formation 1 Shepherdstown gravel 1 568 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued West Virginia Continued West Virginia Continued Permian Pennsylvanian Continued Bellton coal group (in Greene and Cairo gas, silt, or oil sand x (sub­ Washington formations) 1 surface) Bristol limestone (in Washington Cambridge red bed (in Cone­ formation) l maugh formation) 1 Burton sandstone (in Greene Campbell Creek limestone (in formation) l Kanawha formation) 1 Cassville shale member (of Campbell Creek (Lower) sand­ Washington formation) 1 stone (in Kanawha formation) l Creston shale (in Washington Canaan Mountain fire clay l formation) 1 Cannelton limestone (in Kana­ Dolls Run sandstone (in Wash­ wha formation) 1 ington formation) 1 Cannelton shale (in Kanawha Elm Grove limestone member formation) 1 (of Washington formation) 1 Carroll sand l (subsurface) Fish Creek shale (in Greene Cedar Grove sandstone (in Kana­ formation) l wha formation) l Gilmore limestone (in Greene Cedarville sandstone (in Monon­ formation) 1 gahela formation) 1 Hundred sandstone (in Washing­ Charleston sandstone l ton formation) 1 Chilton sandstone (in Kanawha Mannington sandstone (in Wash­ formation) l ington formation) 1 Clark formation 1 Proctor sandstone (in Greene Clarksburg fire clay shale (in formation) 1 Conemaugh formation) 1 Rockport limestone (in Greene Clarksburg red shale (in Cone­ formation) l maugh formation) 1 Rush Run sandstone (in Greene Cleveland sandstone (in Kana­ formation) l wha formation) 1 St. Cloud sandstone (in Greene Coalburg sandstones (in Kana­ formation) l wha formation) 1 Shannon Run limestone (in Coalburg shale (in Kanawha for­ Washington formation) l mation) 1 Washington fire clay shale (in Corinth sandstone (in Cone­ Washington formation) l maugh formation) 1 Pennsylvanian Decota sandstone (in Kanawha Albright limestone (in Cone- formation) 1 maugh formation) 1 Dingess limestone (in Kanawha Ames shale (in Conemaugh for­ formation) l mation) 1 Dingess sandstone (in Kanawha Annabelle shale (in Monon- formation) 1 gahela formation) 1 Dingess shale (in Kanawha for­ Arnoldsburg limestone (in mation) 1 Monongahela formation) 1 Dorothy limestone and shale (in Arnoldsburg sandstone (in Kanawha formation) 1 Monongahela formation) 1 Dotson sandstone 1 Bald Knob shale (in Kanawha Dotson (Lower) sandstone l formation) 1 Douglas shale (in Kanawha for­ Bens Creek sandstone (in mation) x Kanawha formation) 1 Eagle limestone (in Kanawha Blackwater shale and limestone 1 formation) 1 Braxton formation 1 Eagle sandstone (in Kanawha formation) 1 Breedon sand l (subsurface) Eagle shale (in Kanawha forma­ Brownstown sandstone (in Kana­ tion) 1 wha formation) 1 East Lynn sandstones (in Alle­ Brush Creek fire clay shale (in gheny formation) l Conemaugh formation) 1 Eckman sandstone (in Pottsville Brush Creek shale (in Cone­ group) 1 maugh formation) 1 Elk fire clay (in Conemaugh for­ Buffalo Creek limestone (in Ka­ mation) x nawha formation) 1 fElkgarden formation 1 Burning Springs sand J (sub­ fElk River series l surface) Fairfax formation ! INDEX TO THE GEOLOGIC NAMES OF NORTH AMEKICA 569

United States Continued United States Continued West Virginia Continued West Virginia Continued Pennsylvanian Continued Pennsylvanian Continued Fairfax limestone * Newlon limestone and shale (in fFayette sandstone * Kanawha formation) 1 Flattop Mountain sandstone 1 fNew River coal series 1 Gilbert sandstones (in Kanawha fNew River system 1 formation) 1 North Fork shale l Gilbert shale (in Kanawha for­ Nuttall (Lower) sandstone 1 mation) x Oceana limestone (in Kanawha Grafton sandstone (in Cone- formation) l maugh formation) 1 limestone (in Cone­ Grampus 1 (sand) (subsurface) maugh formation) 1 Grapevine sandstone (in Kana­ Peerless sandstone (in Kanawha wha formation) 1 formation) l Guayandot sandstone (in Sewell Pickens sandstone 1 formation) l t Piedmont sandstone (in Potts- Hammond fire clay (in Kanawha ville formation) 1 formation) l Pierpont sandstone x Hardman fire clay (in Allegheny Pineville sandstone l formation) l Piney Creek conglomerate 1 Hartridge shale 1 Quakertown slate (in Kanawha Harvey conglomerate lentil (in formation) l Sewell formation) * tQuinnimont beds or coal group 1 Hernshaw sandstone (in Kana­ Quinnimont sandstone 1 wha formation) 1 Raymond limestone (in Monon- Homewood (Lower) sandstone gahela formation) 1 (in Kanawha formation) 1 Rich Mountain conglomerate l Horseneck sand l (subsurface) Rift shale 1 Horsepen 1 (coal group) Ritchie red beds (in Monon­ Hughes River flint (in Cone- gahela formation) 1 maugh formation) 1 fRoaring Creek sandstone (in laeger sandstones (in New River Kanawha formation) 1 formation) l Rosedale gas sand 1 (subsurface) Indian Gap limestone (in Kana­ Royal formation l wha formation) * Royal shale 1 Irondale limestone (in Cone- Ruffner fire clay (in Allegheny maugh formation) 1 formation) 1 Island Run sand 1 (subsurface) Sandy Huff shale 1 Jane Lew sandstone (in Cone- Seth limestone (in Kanawha maugh formation) l formation) l Kanawha black flint (in Kana­ wha formation) 1 Skelt shale1 Keystone sandstone 1 Stockton limestone (in Kanawha Landgraff sandstone (in Poca- formation) l hontas formation) 1 Stockton shale (in Kanawha fLogan sandstone (in Kanawha formation) 1 formation) 1 Stockton slate (in Kanawha Maiden sandstones (in Kanwha formation) 1 formation) l Summers series ! Mason shale (in Conemaugh for­ Sutton limestone (in Conemaugh mation) l formation) 1 Matewan sandstone (in Kanawha Thornton fire clay (in Conemaugh formation) 1 formation) l Minshall sand l (subsurface) Twomile limestone (in Cone­ maugh formation) 1 Mona limestone (in Conemaugh Tyler red beds (in Monongahela formation) 1 formation) 1 Monitor sandstone (in Kanawha Vivian sandstone * formation) 1 War Eagle sandstone (in Kana­ Monitor (Lower) sandstone (in wha formation) 1 Kanawha formation) 1 Welch sandstone 1 Moundsville sand ! (subsurface) Weston sandstone (in Monon­ Murphy sand 1 (subsurface) gahela formation) 1 Naugatuck sandstone (in Kana­ Weston shale (in Monongahela wha formation) l formation) 1 570 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued West Virginia Continued West Virginia Continued Pennsylvanian Continued Mississippian Continued Wharncliffe sandstone 1 Bellepoint shale (in Hinton for­ Wheeling group 1 mation) 1 Williamson sandstone (in Kana- Bent sandstone (in Bluestone wha formation) 1 formation) 1 Winifrede limestone (inKanawha Bent shale (in Bluestone forma­ formation) l tion) 1 Winifrede sandstone (in Kana- Bertha sandstone (in Bluefield wha formation) 1 formation) 1 Upper Pennsylvanian Bertha shale (in Bluefield forma­ Benwood limestone member (of tion) 1 Monongahela formation) l Bickett shale (in Bluefield forma­ Clarksburg limestone member tion) 1 (of Conemaugh formation) 1 Big Spruce Knob sandstone 1 Fulton shale member (of Monon­ Big Spruce Knob shale l gahela formation) 1 Bradshaw limestone (in Bluefield Gilboy sandstone member (of formation) 1 Monongahela formation) 1 Bradshaw sandstone (in Blue- Morgantown sandstone member field formation) 1 (of Conemaugh formation) 1 Bradshaw shale (in Bluefield Uffington shale member (of Cone­ formation) 1 maugh formation) 1 Bratton sandstone (in Bluestone Middle Pennsylvanian formation) l Kanawha formation 1 Bratton shale (in Bluestone for­ Pugh formation * mation) l Quinnimont shale ' fCanaan formation1 Thurmond formation ' Clayton sandstone (in Bluefield Upshur sandstone ' formation) 1 Lower Pennsylvanian Clayton shale (in Bluefield for­ Bayard formation * mation) 1 Bear wallow conglomerate1 Coney limestone (in Bluefield Blackwater formation 1 formation) x (as group l Coney shale (in Bluefield for­ or series J) mation) 1 Nuttall sandstone member (of Dawson sand 1 (subsurface) Sewell formation) 1 Denmar formation ! Raleigh sandstone 1 Droop sandstone (in Bluefield Sequoyah formation l formation) 1 Sewell formation 1 Edray sandstone (in Bluefield Teilowa formation 1 formation) 1 Welch formation 1 Five mile shale (in Hinton forma­ Mississippian tion) » Ada shale (in Bluefield forma­ Glady Fork sandstone (in Blue tion) 1 stone formation) 1 Alderson limestone (in Greenbrier Glenray limestone (in Bluefield limestone) l formation) > Goodwyn sandstone (in Hinton Anawalt sandstone 1 formation) 1 Avis limestone (in Hinton for­ Goodwyn shale (in Hinton for­ mation) x mation) l Avis sandstone (in Hinton for­ f Greenbrier series * mation) 1 fGreenbrier shales l Avis shale (in Hinton forma­ Greenville shale (in Greenbrier tion) » limestone) 1 Ballard Harmon sandstone 1 Hackett sandstone (in Hinton Beckett sand l (subsurface) formation) x Belcher sandstone (in Bluestone Hackett shale (in Hinton forma­ formation) 1 tion) 1 Belcher shale (in Bluestone for­ Hartwell sandstone l mation) l fHinton limestone (in Hinton Bellepoint limestone (in Hinton formation) 1 formation) 1 Hinton sandstone 1 Bellepoint sandstone (in Hinton Hunt sandstone (in Bluestone formation) 1 formation) l INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 571

United States Continued United States Continued West Virginia 'Continued West Virginia Continued Mississippian Continued Mississippian Continued Hunt shale (in Bluestone for­ Tophet sandstone (in Hinton mation) l formation) 1 Indian Mills sandstone (in Blue- Tophet shale (in Hinton forma­ field formation) * tion) 1 Indian Mills shale (in Bluefield Union limestone (in Greenbrier formation) J limestone) 1 Keener sand l (subsurface) Webster Springs sandstone (in fLewisburg limestone 1 ) 1 Lillydale shale (in Bluefield for­ Upper Mississippian mation) l Bent Mountain member (of Blue- Lindside sandstone (in Pocono stone formation) J sandstone) l Bluefield shale 1 or formation Low Gap limestone (in Hinton Greenbrier limestone l formation) 1 Hillsdale member (of Greenbrier Low Gap sandstone (in Hinton limestone) 1 formation) 1 Mud Fork member (of Bluestone Low Gap shale (in Hinton for­ formation) 2 mation) 1 Taggard red member (of Green- Maxton sand J (subsurface) brier limestone) (as shales J) Pageton sandstone l Stony Gap sandstone member Patton limestone (in Greenbrier (of Hinton formation) 1 limestone) 1 1 Patton shale (in Greenbrier lime­ Lower Mississippian stone) l shale 1 Payne Branch sandstone (in Myers shale 1 Hinton formation) 1 Pinkerton sandstone l Payne Branch shale (in Hinton Purslane sandstone l formation) l Rockwell formation l Pickaway limestone (in Green- Upper Devonian brier limestone) 1 Benson sand 1 (subsurface) Pipestem shale (in Bluestone for­ Burnside sand 1 (subsurface) mation) 1 Childress sand 1 (subsurface) Pluto limestone (in Hinton for­ Elkins sandstone l mation) l Hampshire formation x Pluto shale (in Hinton forma­ Hendricks sandstone l tion) 1 Riley sand 1 (subsurface) Possumtrot shale (in Bluefield Rowlesburg sandstone (in Chemung formation) l formation) l Pride shale (in Bluestone forma­ Valley Head sandstone l tion) 1 Whetstone Run sand 1 (subsur­ Raines Corner limestone (in face) Bluefield formation) 1 Woodmont shale member (of Raines Corner shale (in Bluefield Jennings formation) l formation) l Middle Devonian Reynolds limestone (in Bluefield Landes limestone 1 formation) 1 Romney shale 1 Rouzer sand 1 (subsurface) Lower Devonian Sinks Grove limestone (in Green- Big Mountain shale member (of brier limestone) 1 Keyser limestone) 1 Taggard limestone (in Greenbrier l limestone) 1 Keyser limestone (as member of Talcott shale (in Bluefield forma­ Helderberg limestone l) tion) 1 fLewistown chert lentil l (in Tallery limestone (in Hinton Lewistown limestone) formation) 1 Morgan series 1 Tallery sandstone (in Hinton for­ 1 mation) l Silurian Tallery shale (in Hinton forma­ Williamsport sandstone l tion) 1 Middle ana Upper Ordovician Terry limestone (in Hinton for­ Martinsburg shale l mation) 1 Lower Cambrian Terry shale (in Hinton forma­ Antietam sandstone 1 or quartzite tion) 1 (as shale J) 572 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued West Virginia Continued Wisconsin Continued Lower Cambrian to Middle Ordo- Cambrian vician Port Wing brownstone member Shenandoah limestone l (of Orienta formation) J Wisconsin Upper Cambrian Pleistocene (Wisconsin) Arcadia member (of Trem- fEast Wisconsin formation 1 pealeau formation) J Two Creeks forest bed 8 Birkmose member (of Franconia Wisconsin drift or till l formation) J Cretaceous or Tertiary fBlack Earth dolomite member l (of St. Lawrence formation) l Devonian Eau Claire grit l Belgium member l (of Lake Eau Claire sandstone 1 Church formation) Devils Lake sandstone l Lake Church formation l Goodenough member (of Fran­ Middle Devonian conia sandstone) l Berthelet member l (of Milwau­ Hudson member (of Franconia kee formation) sandstone) l Lindwurm member l (of Milwau­ fronton sandstone member (of kee formation) Franconia sandstone) l Milwaukee formation 1 Lodi member (of Trempealeau North Point member l (of Mil­ formation); (as member of St. waukee formation) Lawrence formation J) Ozaukee member J (of Lake Madison sandstone * Church formation) Mazomanie sandstone 1 Thiensville formation 1 Mendota dolomite member (of Silurian St. Lawrence formation) l Byron beds l 1 Iron Ridge ore bed * Myers Hill sandstone l Mayville limestone l Norwalk sandstone member (of t Mound limestone l Jordan sandstone) * Wauwatosa formation J Sparta shale 1 Upper Silurian Sunset Point formation J Waubaukie dolomite * Tomah member (of Franconia Middle Silurian formation) J l Trempealeau formation 1 Waukesha limestone 1 Woodhill member (of Franconia Lower Silurian formation) J Burroughs dolomite l Precambrian to Upper Cambrian Upper Ordovician Sauk sequence a l or member (of Precambrian Maquoketa shale) Alloa rhyolite l Middle Ordovician Amnicon formation l Beloit dolomite l Arpin conglomerate and quartz- Magnolia member (of Platteville ite ! limestone) l Athelstane granite l Mifflin member (of Platteville Bad River dolomite x limestone) a fBad River gabbro l l or forma­ |Bad River sandstone l tion Baraboo quartzite l Quimbys Mill member (of Platte­ Baraboo series * ville formation) J Barren quartzite l Lower Ordovician Bayfield group 1 Berlin rhyolite gneiss l Genoa member (of Oneota forma­ fBlack River iron-bearing series l tion) a Breakwater quartzite l Hickory Ridge member (of One­ Chequamegon sandstone l ota formation) J Chippewa quartzite l Mound Ridge member (of One­ Conover slate 1 ota formation) a Copper Creek beds 1 New Richmond sandstone * Dake quartzite l Prairie du Chien group 1 Denzer diorite * Stoddard member (of Oneota Denzer tuff * formation) J Devils Island sandstone x f Willow River limestone l Douglas County traps * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 573

United States Continued United States Continued Wisconsin Continued Wyoming Continued Precambrian Continued Pleistocene Eileen sandstone l Arvada formation * Endeavor granite 1 Buffalo drift » Flambeau quartzite l Bull Lake drift » Freedom dolomite l Pinedale drift l ( Hamburg slate 1 Tertiary Junction City quartzite l fCarbon group l Lohrville granite 1 Castle rhyolite 2 Lower Narrows rhyolite l Cataract basalt 2 Marathon conglomerate l Clear Creek gravels 8 Marcellon quartz porphyry l Elkhorn basalt 2 Marion granite l Lodgepole rhyolite and obsidian 8 Marquette quartz prophyry l Meadow rhyolitic tuff 2 Marquette rhyolite * Ramshorn volcanic series * Marshall Hill conglomerate 1 Sheepeaters basalt 2 Mellen or High Bridge granite 1 Tertiary, upper Merrimac rhyolite 1 Sylvan intrusives * Montello granite l Pliocene Mosinee conglomerate l fCanyon conglomerate l Moundville quartz porphyry 1 fSouth Pass group l Mukwa granite l Tower Creek conglomerate ' Necedah quartzite l fYellowstone Lake group * North Mound conglomerate and Pliocene, lower quartzite 1 Camp Davis formation 2 Observatory Hill quartz por­ Miocene and (or) Pliocene phyry > Canyon basalt 2 Orienta sandstone 1 Crescent Hill basalt 8 Oronto group 1 Elk Creek basalt 2 Otter Creek granite l Geode Creek basalt * Pence ferruginous slate member Lost Creek trachyte l (of Ironwood-iron formation) l Oxbow Creek basalt * fPenokee series 1 Miocene or Pliocene Pike River granite l Burnt Gulch conglomerate 2 Plymouth ferruginous chert Miocene member (of Ironwood-iron for­ Electric Peak intrusives l mation) l Ishawooa intrusives * f Portland quartzite 1 Sherman diorite l Powers Bluff quartzite * Sunlight intrusives 1 Rib Hill quartzite ' Miocene(?) Rowley Creek slate ! Bishop conglomerate l Rudolph quartzite l fWyoming conglomerate l St. Cloud granite l Miocene, upper, and Pliocene, lower Seneca quartz porphyry l Spoon Butte beds l Sunday quartzite l PostrOligocene (?) Utley metarhyolite l Caldwell Canyon volcanics 8 Washburn beds l Waterloo quartzite 1 Hat Creek beds * Wausau granite l Sweetwater group * Wausau graywacke l Sweetwater member * (of White Waushara granite l River group) f Western sandstone l Wiggins formation * Wisconsin Valley slates l Oligocene(f) Age(?) Tatman Mountain gravels 1 Baxter Hollow granite 8 Oligocene, lower Wyoming Beaver Divide conglomerate Quaternary member (of Chadron forma­ Hot Springs formation 1 tion) 2 Quaternary (?) Yoder formation * Salt Lake conglomerate l Eocene and Oligocene Recent Sand Draw sandstone lentil (of Kaycee formation 8 White River formation) 2 Lightning formation ' Eocene Recent (f) Bates Hole formation * Ucross formation 2 fBitter Creek group l 574 GEOLOGIC NAMES OF NORTH AMERICA United States Continued United States Continued Wyoming Continued Wyoming Continued Eocene Continued Eocene, tower Continued Black Rock coal group 1 Newberger sand 1 (subsurface) Blacks Fork member (of Bridger New Fork tongue (of ) 1 formation) 4 Burnt Fork white layer 1 fMorrow Creek member (of Green Cove beds 1 Green River formation) 1 Greenian series * Niland tongue (of Wasatch for­ Hanna formation 1 mation) 2 Knight formation l fRalston formation l fPinyon Peak conglomerate 1 Red Desert tongue (of Wasatch Twin Buttes member (of ) a formation) 1 fSand Coulee beds l Ulm coal group (in Wasatch for­ Tatman formation 1 mation) 1 Tipton shale member or tongue Ulm formation 1 (of Green River formation) 1 Wagonhound member * (of Uinta Wilson sand 1 (subsurface) formation) Wind River formation 1 Eocene, upper Paleocene to Eocene Fowkes formation 1 Will wood formation 2 Tepee Trail formation 2 Paleocene Eocene, upper(f) Almy formation > or conglomerate Continental Peak formation 2 fEvanstonian series 1 Eocene, middle and upper (?) Mantua lentil (of Polecat Bench Bridger formation l formation) 2 fBridgerian series v Pinyon conglomerate 1 Lone Tree white layer 1 Polecat Bench formation a fWashakie formation 1 Rock Bench quarry beds (of Eocene, middle Polecat Bench formation) z Aycross formation 2 Silver Coulee beds (of Polecat Cottonwood white layer x Bench formation) 2 Fontenelle member (of Green Tongue River member (of Fort River formation) 2 Union formation) 1 Laney shale member (of Green Cretaceous River formation) 1 Custerian series 1 Pass Peak conglomerate 2 Upper Cretaceous and Paleocene Sage Creek white layer 1 fDe Smet formation l Tower sandstone lentil (of Green Evanston formation 1 River formation) 1 Ferris formation l Eocene, lower and middle fShoshone group l Battle Spring formation 2 Upper Cretaceous Green River formation ' Adaville formation l Eocene, lower Almond formation 1 Alkali Creek 1 (red stratum in Bacon Ridge sandstone 2 Wind River formation) Basin shale 1 Cathedral Bluffs tongue (of Wa­ Baxter shale * satch formation) 1 tBeaver Creek chalky member fClark Fork beds l (of Niobrara formation) 1 Cottonwood Draw banded lay­ Belle Fourche shale member ers J (in Wind River forma­ (of Graneros shale) 1 tion) Black Buttes coal group l fGray Bull beds l fBlack Butte quartzite l Hoback formation 2 Blair formation 1 Indian Meadows formation 3 Bow formation or group l Kingsbury conglomerate member Chimney Rock tongue (of Blair (of Wasatch formation) 1 formation) 2 Lost Cabin member (of Wind Cody shale l River formation); (as forma­ Elk Basin sandstone member tion i) (of Telegraph Creek forma­ Luman tongue (of Green River tion) 1 formation) 2 Ericson sandstone 1 or formation Lysite member (of Wind River Fitzhugh sands 1 (subsurface) formation); (as formation x) Frontier formation; 1 sandstone Moncrief member (of Wasatch member (of Mancos shale) in formation) 4 NW Colorado and NE Utah INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 575

United States Continued United States Continued Wyoming Continued Wyoming Continued Upper Cretaceous Continued Upper Cretaceous Continued Gammon ferruginous member Torchlight sandstone member (of Pierre shale) 1 (of Frontier formation) 1 fGebo formation 1 Torrington member (of Lance fGolden Wall sandstone (in Blair formation) l formation) l Turner sandy member (of Car­ Hailey shale l lile shale) 1 Hilliard formation l or shale Wall Creek sandstone member fllo formation l (of Frontier formation) * Kimball sand l (subsurface) Lower Cretaceous Knobs-Cherokee coal group * Aspen shale 1 Lance formation 1 Barrett shale 1 Lazeart sandstone member (of Bear River formation : Adaville formation)> Clay Spur bentonite bed (in Little Missouri lens (in New­ ) 1 castle formation) 4 fComo beds * fLittle Pine Ridge sandstone ! Cloverly formation l Medicine Bow formation l Greybull sandstone member (of Meeteetse formation l Cloverly formation) > Mitten black shale member (of Hay Creek formation l Pierre shale) 1 Inyan Kara group 1 Monument Hill bentonitic mem* Mowry shale 1 or member (of ber (of Pierre shale) 1 Mancos shale) Muddy sandstone member (of Newcastle sandstone (as mem­ Thermopolis shale); (as sand J) ber of Graneros shale *) tNefsy shale member (of Gran- Oak Creek beds 1 eros shale) 1 Skull Creek shale (as member Newcastle lens (in Newcastle of Graneros shale !) formation) 4 Thermopolis shale l New Haven lens (in Newcastle Upper Jurassic and Cretaceous formation) 4 Beckwith formation l Octh Louie sand 1 (subsurface) Upper Jurassic Osage lens (in Newcastle forma­ fBeulah clays ! and shale l tion) * Canyon Springs sandstone mem­ Oyster Ridge sandstone member ber (of Sundance formation) 4 (of Frontier formation) 1 Gypsum Spring formation 4 Parkman sandstone ; locally, Hulett sandstone member (of member 1 of several forma­ Sundance formation) 4 tions Lak member (of Sundance forma­ Peay sandstone member (of tion) * Frontier formation)» fShirley stage 1 Pedro bentonite bed (in Pierre Beaver shale member shale) l (of Sundance formation) 4 Pine Ridge sandstone member Sundance formation l (of Mesaverde formation) 1 Middle and Upper Jurassic Piney formation l Twin Creek limestone l or forma­ fPoint of Rocks group J tion Quealy sand J (subsurface) Lower Jurassic Rawlins sandstone 1 Nugget sandstone 1 Rock Springs formation l Triassic Sage Breaks member (of Carlile Crow Mountain sandstone mem­ shale); (as shale member of ber (of ) 2 Niobrara formation !) Little Medicine tongue (of Din- tSalt Wells group 1 woody formation) 1 Shannon sandstone member (of Red Peak member (of Chug- Steele shale) l or member (of water formation) 4 Cody shale) Wyopo formation 4 Steele shale * Triassic (?) fSulphur Creek group l fFreezeput limestone * Sussex sandstone member (of Upper Triassic Cody shale) a Alcova limestone member (of Teapot sandstone (as member of Chugwater formation) 1 Mesaverde formation J) 1 576 GEOLOGIC NAMES OF NORTH AMERICA

United States Continued United States Continued Wyoming Continued Wyoming Continued Upper Triassic Continued Middle Ordovician Popo Agie member (of Chug- Aladdin sandstone J water formation); (as beds J) Cambrian Lower Triassic Buck Spring formation 2 Dinwoody formation l Bull Lake Creek shales l Upper Paleozoic Open Door limestone a Pope Springs sandstone 2 Shoshoni limestone l Permian and Triassic Upper Cambrian Chugwater formation l Boysen formation a fEmbar formation l or group l Du Noir member (of Gallatin fTeton formation l formation) 1 Permian Middle Cambrian Cassa group 2 Death Canyon member (of Gros Ervay carbonate member (of Ventre formation) 1 Park City formation); (as Depass formation 1 tongue* of Phosphoria forma­ Gros Ventre formation l tion ») Precambrian Forelle limestone 1 Anderson phyllite l Freezeout tongue (of Chugwater Deep Lake metaquartzite l formation) l French slate x Glendo shale a Headquarters schist l Satanka shale l Heart metagraywacke l Sybille tongue (of Phosphoria Lookout schist l formation) 1 quartzite s Pennsylvanian, Permian, and Mis­ Medicine Peak metaquartzite 1 sissippian^) Nash marble series1 Hartville formation l Ranger marble1 Pennsylvanian or Permian Seeley slate l Broom Creek group a Seminoe formation 1 Pennsylvanian t Sheridan quartzite l Amsden formation l Sherman granite l Darwin sandstone member (of Sugarloaf metaquartzite l Amsden formation); (as Dor- Towner greenstone 1 win !) Whalen group x Fairbank formation 2 Age(?) Hayden group 2 Jardine "basalt" 2 Meek group 2 Canada Quadrant formation l or quartzite 1 Alberta Reclamation group a Pleistocene Roundtop group 2 Drywood soil 2 Tensleep sandstone l Lenzie silt 2 Wendover group a Strathcona sand and silt s Upper Pennsylvanian and Permian Tofield sand 2 Casper formation 1 Tertiary (?) Foothills series l Sacajawea formation l Eocene (see Upper Cretaceous or Lower Mississippian Eocene) fLittlehorn limestone l Palocene chert member Coalspur beds 2 (of Madison limestone) (J. D. Post-Cretaceous Love, 1939, Geol. Soc. America Ice River intrusive complex v Special Paper 20, p. 25) Cretaceous Devonian and Mississippian Allison Creek sandstone l Guernsey formation l Bad Heart sandstone member l Middle and Upper Devonian (of formation) Darby formation 1 Bellyan series 1 Lower Devonian Berland River shales l Beartooth Butte formation 1 Bighorn formation x Upper Ordovician Blood Reserve sandstone 1 Bighorn dolomite 1 Bulwark sandstone l Lander sandstone member (of Cardium sandstone l Bighorn dolomite) 1 Clearwater shale 1 Leigh dolomite member (of Big­ Crowsnest volcanics v horn dolomite) 1 Dalhousie sand l (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 577

Canada Continued Canada Continued Alberta Continued Alberta Continued Cretaceous Continued Upper Cretaceous Continued Eastend formation l Manyberries member (of Bear- Elk conglomerates * paw formation) 2 Kaskapau member * (of Smoky Medicine Lodge member (of River formation) ) 2 Lea Park formation 1 Milk River sandstone l Lineham member * (of Cardium Mulga tongue 2 (subsurface) formation) Myrtle Creek formation l sandstone l Oldman formation 3 Ribstone Creek formation l Pakan formation l Rocky Mountain limestone l Pakowki formation 1 St. John formation l Pelican shale or sandstone l Saunders group 2 Pouce Coupe sandstone (in Smoky Viking sand or sandstone J (sub­ River shale) 2 surface) Ryegrass sandstone (in Bearpaw Cretaceous (?) shale) l Brazean formation l St. Mary River formation l Upper Cretaceous or Eocene Sawridge formation l Porcupine Hill series l Shandro shale l Upper Cretaceous and Eocene (?) Solomon sandstone member (of * Upper Cretaceous Brazeau formation) 2 Alberta shale l Tar sands l Allison formation l Vanesti tongue 2 Bassand member (of Bearpaw Verdigris sandstone l shale) l Victoria sandstone l Baytree member (of Cardium Wapiabi shale 1 formation) 2 Wapiti formation l formation l Lower or Upper Cretaceous Birch Lake sandstone 1 Joli Fou formation 2 Black Eagle sandstone (in Bear- Lower and Upper Cretaceous paw formation) 4 Blairmore formation 1 Blackstone shale l Lower Cretaceous Brosseau formation 1 2 (subsurface) Chinook member (of Wapiabi Borradaile member (of Mann- formation) 2 ville formation) 2 (subsurface) Chungo member (of Brazeau for­ Bull Head Mountain sandstone * mation) 4 Cadomin conglomerate l Doe Creek sandstone (in Dun- Cadotte member (of Peace River vegan formation) 2 formation) 2 Drumheller marine tongue (of Cummings member (of Mannville formation) 2 formation) 2 (subsurface) Dunvegan sandstone l Deville formation 2 (subsurface) Edmonton formation * Dina member (of Mannville for­ Entrance conglomerate (in Ed­ mation) 2 (subsurface) monton formation) 2 Ellerslie member (of Blah-more Foremost formation l formation) 2 (subsurface) Grizzly Bear formation l Falher member (of Highwood sandstone (in Wapiabi formation) 2 (subsurface) formation) 2 Grand Rapids sandstone l Howard Creek sand (in Kaska­ Harmon member (of Peace River pau formation) 2 formation) 2 Jumpingpound member (of Al­ Islay member (of Mannville for­ berta shale) 2 mation) 2 (subsurface) Kipp sandstone (in Bearpaw Kootenay formation (Eootenai shale) * formation l of U.S.) Kneehills tuff 2 Looma member (of Grand Rapids La Biche shales * formation 2 (subsurface) Lethbridge member (of Oldman Luscar formation l formation) 2 McLeod member (of Lloydminster shale 2 (subsurface) formation) l Loon River shale l McMurray formation l Magrath sandstone (in Bearpaw Mannville formation 2 (subsur­ shale) l face) 578 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Alberta Continued Alberta Continued Lower Cretaceous Continued Carboniferous Continued member (of Cummings member (of Mount Kootenay formation) 2 Head formation) 2 Mountain Park formation l Etherington member (of Rocky Nikanassin formation 1 Mountain formation) 2 Notikewin member (of Spirit Greenock formation 2 River formation) 4 Livingstone formation J O'Sullivan member (of Mann- Marston member (of Mount ville formation) 2 (subsurface) Head formation) 4 Paddy member (of Peace River Mount Head formation s formation) 2 Pekisko member (of Livingstone formation) 4 Pocaterra Creek member (of Rocky Mountain quartzite 1 Blairmore formation) 2 Salter member (of Mount Head St. Edouard member (of Grand formation) 2 Rapids formation) 2 (subsur­ Wileman member (of Mount face) Head formation) 2 St. Paul member (of Grand Carboniferous and Devonian(f) Rapids formation) 2 (subsur­ Banff series l face) Pennsylvanian to Permian formation 3 (sub­ Storm Creek formation * surface) Mississippian and Pennsylvanian(f) Sunset sandstone * Tunnel Mountain member (of Tovell member (of Mannville Rundle formation) 4 formation) 2 (subsurface) Mississippian Vanalta sand * (subsurface) Bedson limestone * Wabiskaw member (of Clear- Debolt formation 2 (subsurface) water formation) 2 (subsurface) Dyson Creek member (of Rundle Wilrich member (of Spirit River formation) 2 formation) 2 (subsurface) Loomis member (of Mount Head Jurassic formation) 2 Conrad sandstone member (of Moosehorn limestone 1 Sawtooth formation) 2 (sub­ Shunda member (of Rundle for­ surface) mation) 2 Crow Indian Lake member (of Turner Valley member (of Tun­ Sawtooth formation) 4 (sub­ nel Mountain formation) 2 (sub­ surface) surface) Lille member (of Fernie forma­ Devonian and Carboniferous tion) 2 Turtle Mountain group l Nordegg member (of Fernie for­ Devonian mation) 2 formation 3 (sub­ Pigeon Creek member (of Fernie surface) formation) 2 Blackface Mountain shale l Triassic Blue Ridge member (of Graminia Spray River formation l formation) 2 (subsurface) Sprayan series 1 Cairn formation 4 Lower Triassic Calmar member (of Winterburn Sulphur Mountain member (of formation) 2 (subsurface) Spray River formation) 4 Cheviot formation 4 Permian (see Pennsylvanian to Chinchaga formation 8 (subsur­ Permian) face) Permian and Pennsylvanian(f) member (of Wood- Norquay Mountain member (of bend formation) 2 (subsurface) Rocky Mountain formation) 2 Duvernay member (of Woodbend Tunnel Mountain member (of formation) 2 (subsurface) Rocky Mountain formation) 2 Fairholme formation 4 Carboniferous Graminia member (of Winter- Banner silt (in Turner Valley burn formation) 2 (subsurface) member of Livingstone forma­ Ireton member (of Woodbend tion) 4 formation) 2 (subsurface) Baril member (of Mount Head Keg River formation 2 (subsur­ formation) J face) Carnarvon member (of Mount Leduc member (of Woodbend Head formation) 4 formation) 2 (subsurface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 579

Canada Continued Canada Continued Alberta Continued Alberta Continued Devonian Continued Ordovician Miette member (of Minnewanka Sarceen series l formation) 2 Skoki formation * Minnewanka formation 1 Lower Ordovician Mount Wilson quartzite l Mons formation l Muskeg formation 2 (subsurface) Sarbach formation l Nisku member (of Winterburn Cambrian and Lower Ordovician(f) formation) 2 (subsurface) Sawback formation * Palliser formation 2 Cambrian Roche Miette limestone l Barker shale l Southesk formation s Bosche formation l Wabamun formation 2 (subsur­ Chetang limestone 1 face) Mahto sandstones 1 Watt Mountain formation 8 (sub­ Sulliyanian series l surface) Tatei formation l (see also Tatay Winterburn formation 2 (sub­ limestone *) surface) Thompson dolomite 1 Woodbend formation 2 (subsur­ Titkana limestone 1 face) Upper Cambrian Devonian (?) Arctomys formation l formation l fBosworthian series l Upper Devonian Chetamon limestone l Alexo formation * Lyell formation l Banffian series l Pika formation 2 Big Valley member (of Wabamun Sawbackian series l formation) 2 (subsurface) Snaring formation l Boule limestone l Sullivan formation l Cinquefoil limestone l Tangle Ridge formation 2 Coronach shale 1 Middle Cambrian Costigan member (of Palliser Eldon limestone l formation) 2 Eldonian series 1 Delburne formation 2 Murchison formation l Delia member (of Woodbend Naiset formation 2 group) 2 limestone l Donalda formation 3 Sunwapta Peak formation 2 Exshaw shale 2 Lower Cambrian Fenn formation 2 Cavell formation l Fiddle limestone l Fairview formation * Gog formation» Grosmont member (of Woodbend shale l formation) 2 (subsurface) Louise formation x Hondo member (of Woodbend Mount Whyte formation l formation) 2 (subsurface) Piran series l Kiln shale 1 St. Piran sandstone l Leahurst formation 2 Whyte formation l Morro member (of Palliser forma­ Precambrian and (?) Lower Cam­ tion) 2 brian Mount Hawk formation * Jonas Creek formation 2 Perdrix shale l Precambrian Spence River shale 2 (subsurface) Albertian series l Stettler member (of Wabamun Athabasca sandstone l formation) 2 (subsurface) Blackfoot Canyon facies (of Belt Territories formation 2 (subsur­ series)2 face) Carthew member (of Altyn for­ Waterways formation 2 mation)2 Corral formation * Middle Devonian Corral Creek formation l Fort Vermilion member (of Slave Cour d'Alene facies (of Belt Point formation)1 series) 2 Flume dolomite * Glacier Park facies (of Belt Steen River formation * (sub­ series) 2 surface) Goat River horizon of McBride Silurian group) 2 Elk Point formation > (subsurface) Hector formation * 504835 59 12 580 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Alberta Continued British Columbia Continued Precambrian Continued Tertiary Continued Hell Roaring member (of Altyn Kruger alkaline body l formation) 2 Mann Creek formation 1 Jasper series l Masset volcanics l McBride group 2 Park granite 1 Meagher fades (of Belt series) 2 Rapid formation * Miette formation l Rexmont porphyry * Mount Rowe member (of Miller alkali granite l Peak formation) 2 Sheppard granite l Tete Jaune horizon (of McBride Similkameen beds l group) 2 Skonun formation l Waterton dolomite l (see also Sophie Mountain conglomerate * Watertown formation *) Spence Bridge series l British Columbia Sunloch metagabbro * Quaternary Tranquille beds l Cordilleran formation l Tuya lavas l Hoodoo lavas 2 Valhalla granite l Iskut River lava 2 White Lake formation * Stikine lavas 2 Tertiary (?) Recent Similkameen granite 1 Alouette gravel s Miocene (see also Oligocene or group * Miocene) Salish group 2 Carmanah Point beds 1 Tseax River lava flow l Nipple Mountain series 8 Pleistocene to Recent Otter granite * Bose gravel 2 Skull Hill formation l Cloverdale sediments 2 Miocene(?) Sunnyside sand 2 Chilliwack granodiorite l Posi^Pleistocene (?) Lightning Creek diorite l Bellabella formation l Salmon River monzonite l Pleistocene Slesse diorite l Abbotsford gravel J Oligocene and (or) Miocene Colebrook gravel 2 Sooke formation * Colwood sands and gravels l Oligocene or Miocene Cordova sands and gravels J Kamloops volcanic group l Garibaldi volcanic formation l Midway volcanic group * Lynn outwash 2 Oligocene Marysville sands 1 Allenby formation J Maywood clay 1 Cedar volcanic series l Newton stony clay s Coldwater group 1 Nicomekl silt (see also Nikomeki Curry Creek series l sand and silt1) Escalante formation s Point Grey formation 1 Franklin monzonite l Quadra group 2 Sooke gabbro group or intru- Saanich formation l sives 1 St. Eugene silts * Oligocene(f) Sapperton sediments J Ashcroft rhyolite porphyry 1 Semiamu group 2 French Bar formation 1 Semiamu till 2 Kettle River formation l Seymour group 3 Taseko formation l Seymour till 2 Oligocene or younger Sisters varved clay 2 Endako group J Surrey till a Eocene or Oligocene silts 1 Princeton group J Wreck Bay formation ' Post-Eocene Wycliffe glacial epoch and drift ! Prospect Point eruptives l Tertiary (see also Mesozoic or Eocene Tertiary; and Cretaceous or Burrard formation l Tertiary) Chu Chua formation l formation l Huntingdon formation ' Coquihalla series 1 Marron formation 2 Etheline volcanics ! Metchosin volcanics 1 Kitsilano formation l Springbrook formation 3 INDEX TO THE GEOLOGIC NAMES OP NORTH AMERICA 581

Canada Continued Canada Continued British Columbia Continued British Columbia Continued Eocene(f) Upper Cretaceous Continued Beaverdell quartz monzonite * Helveker volcanics 2 Kishenehn formation x Hornby formation * Rexmount volcanics * Kotaneelee formation * Eocene or older Lambert formation 2 Australian members (of Fraser group l River formation) * Newcastle formation l Mesozoic or Tertiary Northumberland formation l Beaver Mountain group l Protection formation 1 Mesozoic Quah'cum formation 2 Rossland monzonite x Smoky group 2 Mesozoic(f) and older (?) Smoky River series 1 Phoenix volcanic group l Spray formation 2 Mesozoic and Carboniferous(f) Sukunka member (of Dunvegan Wallace group 2 formation) l Lower Mesozoic Sustut group 2 Shonektaw formation * Tribune formation 2 Cretaceous or Tertiary group 1 Bulkley eruptives 1 sandstones l Skagit volcanic formation l Upper Cretaceous(f) Sloko group 2 Sifton formation 2 Whitemans Creek granite 2 Lower or Upper Cretaceous Cretaceous (see also Jurassic or Leckie group 2 Cretaceous) Post-Lower Cretaceous Cedar District formation * Bridge River augite diorite ' formation l Lower Cretaceous Eagle diorite * Brew group 2 Eldorado series l or granodiorite ' Brockenback Hill formation l formation * Buckinghorse formation 2 Ganges formation * Bullhead group * Gates formation 1 Canyon sandstone member (of Gething member l (of Bullhead ) 2 Mountain formation) Commotion formation 2 Haida member (of Queen Char­ Cruiser formation 2 lotte series) l Curved Tree Point sandstone Honna formation * member (of Gething forma­ Komooks beds * tion) 2 Moosebar formation * Gust Island sandstone member Quesnal River beds * (of Gething formation) 3 Skidegate formation 1 Dunlevy formation 2 Cretaceous(f) Elk conglomerate 2 Baker gabbro * Galloway sandstone member (of Beady formation * Gething formation) 2 Bitter Creek peridotite l Garbutt formation 2 Duncan formation * Goodrich formation 2 Fife gabbro 1 Hasler formation 2 Quesnal River series * Heron Creek sandstone member Silver King porphyry 2 (of Gething formation) 2 Tamihy series * Jackass Mountain conglomerate Upper Cretaceous or Tertiary group 1 Sheba group 2 Jackass Mountain group * Upper Cretaceous Kingsvale group 2 Benson formation » Larry sandstone member (of group x Gething formation) 2 Cranberry formation * Lepine formation 2 De Courcy formation l Lillooet group 2 Denman formation 2 Nechacco series l Departure Bay calcarenites l One Tree formation 2 East Wellington formation x Peninsula formation l Extension formation l Queen Island forma­ Fort Nelson formation 2 tion x Gabriola formation l Scatter formation 2 Goeffrey formation 3 Shaftesbury formation 2 Haslam formation l Sikanni formation 2 582 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued British Columbia Continued British Columbia Continued Lower Cretaceous Continued Jurassic(f) Skajit River beds l Baldie granite x sandstone, 1 series, 1 or Beale diorite 1 formation l Bralorne intrusives * Uslika formation * Camp Cove series » Lower Cretaceous(f) Custer granite gneiss 1 formation 2 Darlington granodiorite x Inklin group 2 Denain formation * Pre-upper Lower Cretaceous Fairview granodiorite a Hedley diorite-gabbro 2 Gillies intrusives * Jurassic or Cretaceous Goose Bay formation l Open Bay group 1 Hazelton group 1 Spearing group 2 Kano quartz diorite ' Spence Bridge volcanic group 1 Kootenay granite * Jurassic or Cretaceous (?} Mount Murray diabase l Bonnington complex (R. Mulli­ Olalla pyroxenite 2 gan, 1952, Canada Geol. Sur­ Oliver granite * vey Paper 52-13, p. 10-13). Osoyoos granodiorite x Tachek group 2 Peterson Creek syenite * Jurassic (see also Triassic or Pine River formation * Jurassic; and Triassic and Rykert granite * Jurassic) Sinwa group * Agassiz series 1 Sumas diorite » Ashcroft series * Sumner gabbro 3 Basque formation 1 Westkettle quartz diorite * Black Canyon formation 1 Yonakina group * Boulder granite * Upper Jurassic and Lower Creta­ Colquitz gneiss l ceous Cornwall formation x Armagosa member (of Red Rose Coryell syenite 2 formation) * Dewdney Creek series * Blind Boy member (of Red Rose Dolly Varden formation l formation) 2 Eagle granodiorite 1 Dawn member (of Red Rose Fernian series x formation) * 1 Mill member (of Red Rose Franklin granodiorite l formation) * Harbledown formation l Red Rose formation 3 Hurley formation 2 Upper Jurassic or Lower Cretaceous Image member (in Queen Char­ Beattie Peak formation * lotte group) * Chuchi Lake syenite 2 Kaslo schists l Duckling Creek syenite a Kitzault River formation * Monach formation * Ladner series x Monteith formation * Langara quartz diorite 1 Upper Jurassic Maude argillites l Agassiz Prairie formation * Minabariet formation * Billhook formation * Mount Sicker formation x Kent formation * Nelson granodiorite l Mysterious Creek formation * Ntlakapamux formation 1 Middle or Upper Jurassic Opuntia formation 2 John Brown formation 3 Rock Creek granodiorite, 1 or Middle Jurassic gabbro and diorite * Echo Island formation * Rock Creek member (of Fernie formation ' formation) 2 Lower to Middle Jurassic Saanich granodiorite 1 Nazcha formation * Salmon River conglomerate 1 Lower Jurassic Sicker series 1 Takwahoni group * Smelter granite * Jurassic and Triassic(f) Taylor group 2 Nitinat formation 1 Thompson series * Sutton formation * Trail granodiorite 2 Jurassic and (or) younger Tyee porphyrite > Olalla syenite 2 Wark gneiss l Oliver syenite * Yakoun volcanics 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 583

Canada Continued Canada Continued British Columbia Continued British Columbia Continued Triassic or Jurassic Middle Triassic Bear River formation 1 Liard formation 3 Bitter Creek formation 1 Whitehorse member (of Spray Goat Mountain formation * River formation) a Marble Bay formation » Lower Triassic Nass formation x Grayling formation a Triassic and Jurassic Triassic and for) older Sansum formation a Barslow formation a Vancouver series * Bradshaw formation a Triassic (see also Carboniferous or Independence formation 3 Triassic; and Carboniferous and Triassic or older Triassic) Old Tom formation a Aberdeen formation * Shoemaker formation a formation l Triassic and older (f) Baldonnel formation * Ymir group a Cadwallader series » Paleozoic (see also Precambrian or Charlie Lake formation * Paleozoic) China Creek andesite 2 Ainsworth formation * or series 1 Cultus formation * Josephine formation » Franklin Creek basalt * Hall series 1 Paleozoic(f) Hedley formation 2 Caulfield formation * Henry formation a Upper Paleozoic Karmutsen volcanics * Bear River beds * Kaslo series l Stoddard formation a (subsur­ Lucky Jim limestone (in Zincton face) member of Slocan series) 2 Upper Paleozoic(t) Nicola series l Highland formation l Pardonet member (of Schooler Permian Creek formation) a Blind Creek formation a Parson Bay group l Buttle Lake group : Quatsimo limestone * Kedahda formation a Redtops formation * Teslin formation a Slollicum series * Permian (?) Thibert series 1 Fergusson series a Toad formation a Permian and older (f) Valdes group l Asitka group 2 Whitewater limestone a Permian to Ordovician(t) Zincton member (of Slocan Dease series 1 series) a Post- Carboniferous (f) Triassic(?) Lardeau diabase schists l Elise formation a Carboniferous or Triassic Kitsalas formation 1 Boston Bar group 1 Shulaps volcanics * Prince Rupert formation l Topley granite a Red Mountain formation * Tulameen group * Slocan series * Wolf Creek formation 3 Sunnyside limestone l Triassic(f) and (or) older Carboniferous and Triassic Bowen Island group * Milford group l Gambier group a Carboniferous and (or) Permian Upper Triassic to Upper Jurassic Jackpot limestone a Takla group a Carboniferous and Permian Upper Triassic or Jurassic Mount Steyens greenstone and Pioneer formation a amphibolite 2 Upper Triassic and Lower Juras- Carboniferous sic(f) Brooklyn formation l Bonanza group * Cache Creek group or series l Upper Triassic Campbell Creek beds » Honakta formation a Franklin group l King Salmon group a Kaslo volcanics l Noel formation a Kingston limestone l Schooner Creek formation l Marble Canon limestone x Stuhini group 2 formation l Tyaughton group a Rawhide formation * 584 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued British Columbia Continued British Columbia Continued Carboniferous Continued Devonian Redtop formation l H arrogate limestone l Ruth argillite l McConnell formation a Silver Hoard formation l Messines formation x Siwash series l Muncho formation a Skyline formation l Pipestem formation l Star limestone 1 Starbird formation l Stevenson limestone * Devonian(f) Carboniferous and older (?) Mount Foster formation l Chilliwack series l Perkins group x Carboniferous(f), Triassic(f), Juras- Taku group 1 sic(?) Post-Middle Devonian, pre-Upper Rossland volcanic group * Mississippian Carboniferous (?) Sylvester group a Anarchist series l Middle Devonian Ashnola gabbro 1 H arrogate formation * Attwood series 1 Nahanni formation * Brittania formation 1 Pre-Middle Devonian Cascade series 1 Mountain Creek formation * Kobau group a Silurian and Devonian Kruger schist l Hidden Valley group a Lemieux Creek formation 1 Silurian and (or) Middle Devonian Malahat volcanics l Burnais formation a Nickel Plate formation 1 Silurian Sutherland schistose complex » Briscp formation * Vaseaux formation 2 Ordovidan (see also Cambrian or Vedder greenstone l Ordovician; and Cambrian and Carboniferous(?) and older(?) Ordovidan) Pend Oreille group 1 Active formation a Carboniferous and younger Glenogle shale * Leach River (formation) * Gloucester formation * Thompson group 2 Robson limestone 2 Carboniferous or pre-Carboniferous Sinclair formation * Early Bird formation » Wapta formation 1 Point Woodbury formation * Wonah quartzite x Princess formation 1 Ordovician(?) and younger Pre-Carboniferous Seeman group 2 Knob Hill group 1 Upper Ordovician and Lower Silu­ Pennsylvanian or Permian(f) rian Bridge River series * Sandpile group a Pennsylvanian Upper Ordovician Rundle limestone 1 Beaverfoot formation * Rundlian series l Lower and Middle Ordovician Mississippian Walker group a Antler formation * Lower Ordovician Dessa Dawn formation 2 Chushina formation 1 Greenbury formation 1 Cambrian or Ordovician Guyet formation 1 Bluebell limestone 2 Kindle formation 2 Cambrian and Ordovician Slide Mountain series l Goodsir formation 1 Wardner limestone l Cambrian and Ordovician(f) Wayerly formation x Fieldian series x Devonian(f), Mississippian, and Cambrian (see also Precambrian or Pennsylvanian(?) Cambrian; Precambrian and Wadin group 2 (or) Cambrian; Precambrian Upper Mississippian and Pennsyl­ and Cambrian) vania^?) Adolphus formation 1 Nizi formation a Chancellor formation x Proserpine intrusives * Chancellorian series * Devonian or Carboniferous Cranbrook formation * Victoria series l formation 1 Whitecap schist series 1 Elko formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 585

Canada Continued Canada Continued British Columbia Continued British Columbia Continued Cambrian Continued Precambrian or Cambrian Con. Hitka formation l Fennell formation * Hota formation l Ishpa formation 2 Jubilee limestone * Kimball formation J McNaughton sandstones 1 Lostway member (of Richfield Mumm limestone l formation) 2 Mural limestone x Matthew formation * Ottertail formation 1 Roundtop member (of Richfield Ottertail limestone * formation) 2 Ottertailian series l Precambrian and (or) Cambrian Redwall breccia * Cunningham limestone 2 Sir Donald formation 1 Midas formation 2 Tah formation * Midas limestone member (of Cambrian(f) Midas formation) 2 Mount Selwyn formation l Snowshoe formation 2 Nisconlith series 1 Yankee Belle formation 2 Upper Cambrian and Ordovician Yanks Peak quartzite 2 McKay group * Precambrian and Cambrian Upper Cambrian group 1 Bosworth formation l Creggan Creek formation * Lynx formation l Reeves limestone member (of Paget limestone 1 Reeves McDonald formation) a Sabine formation * Reeves McDonald formation 2 Sherbrooke limestone * Precambrian to Lower Cambrian(f) Sherbrookian series 1 Bee member (of Richfield forma­ Middle Cambrian tion) 2 Burgess shale * Precambrian Burton formation * Adamsian l (series) Cathedral limestone l Adams Lake series * or group l Cathedralian series x Albert Canyon division * Lake Agnes shale lentil (of Mount Aldridge conglomerate * Whyte formation) * Aldridge formation l Nelway formation 2 Badshot formation * Ross Lake shale member (of Baker member (of Richfield for­ Ptarmigan formation) * mation) 1 Stephen formation * Bakerville formation * Stephensian series 1 schist l Yoho shale lentil (of Mount B. C. member » (of Richfield for­ Whyte formation) 2 mation) Middle Cambrian(?) Beehive formation l Canyon Creek slate 1 Cariboo schists * Lower, Middle and Upper Cambrian Chase quartzite member (in Shu- group l swap series) x Galton series 1 Cinnemousum limestone * Lower and Middle Cambrian Cougar formation x Atan group 2 Cougarian series l Horseranch group 3 Creston quartzite l Lower Cambrian Dewdney formation l Donald strata * Dutch Creek formation l Fort Mountain sandstone 1 Elkoan series l Ingenika group 2 Fort Steele formation 2 Laib group 2 Glacier division x Peyto limestone member (of St. Hamill series 1 Piran sandstone) 2 Horsethief formation * Precambrian or Paleozoic Horsethief Creek formation l Eagle Bay formation 2 Hudson member (of Richfield King Edward formation 2 formation) * Larkin formation 2 Illecillewaet quartzite l Mara formation 3 Kitchener quartzite l group 2 Lardeau series x Precambrian or Cambrian Laurie formation l Badger Creek formation * Lewis series l Barriere formation * Lone Star formation 1 586 GEOLOGIC NAMES OF NORTH AMERICA Canada Continued Canada Continued British Columbia Continued British Columbia Continued Precambrian Continued A ge(t) Continued Lourian series l Goose Bay argillite » Lowhee member (of Richfield Grand Forks schist * formation) l Ice River formation * McDonald formation l Krao limestone l Misinchinka schists * Lost Creek granite body * Monk formation * Lost Horse intrusives * Moose meta-argillite > Oblique Creek formation 2 Motherlode series 2 Port Renfrew series l Mount Nelson formation 1 Proserpine quartz porphyry l argillite 1 (see also Mooyie Providence Cove beds l argillite or formation *) Richter Mountain hornblendite * Moyie sill (gabbro) * Tagish series * Nakimu limestone x Texado group l Nakimuan series 1 Trent River shales * Nisconlithian series * Tutshi series » Nugget series 2 Verde Creek granite l Phillips formation * Wark diorite l Pleasant Valley formation 1 Priest River group (as terrane) : Pleistocene Purcell basalt 1 Keewatin till J or drift * Purcell series 1 Tertiary Quartzite Range formation * Boissevain sandstone l Quesnal Lake crystalline series l Paleocene Rainbow member (of Richfield Turtle Mountain formation a formation) * Cretaceous Reno formation l Ashville beds l Richfield formation l Assiniboine series * Ripple quartzite l Boyne beds x Roosville formation 1 Keld beds l Ross quartzite 1 Morden beds l Rossian series * Pembina beds l Ruby group 2 Pembina Mountain 1 (group) Saddleback series l Riding Mountain beds l Salmon series * Vermilion River beds l Salmon Arm schist l Upper Cretaceous Selkirk series * Cheval beds * Shuswap granite 1 Favel formation a limestone l Millwood formation * Sicamous series l Odanah series l Sujeh formation 1 Souris lignitic * Tenakihi group * Swan River beds 1 Three Sisters formation l Jurassic or older Toby conglomerate l Amaranth formation 2 Tonkawatla formation 1 Upper Jurassic Tshinakin formation x Melita formation 8 Wigwam formation * Waskada formation 3 Windermere series 2 Middle Jurassic Wolf formation l Reston formation 2 Yahk quartzite l (see also Yaak Devonian quartzite l) Elm Point limestone * Precambrian(f) and younger formation * (sub­ Wolverine complex 2 surface) Precambrian (?) Lyleton shale 2 (subsurface) Azure River series l Manitoba formation l Hobson Lake series * Moose Jaw Group ' (subsurface) Irene conglomerate l Qu'Appelle group ' (subsurface) Irene volcanic formation l Stony Mountain shales l Navada member (or Quartzite Range formation) 2 Upper Devonian(?) Manitoban 1 (series) Anderson River group l Middle or Upper Devonian Bear River greenstones l Point Wilkins member (of Man­ Big Sheep volcanics * itoban formation) 8 INDEX TO THE GEOLOGIC NAMES OP NORTH AMERICA 587

Canada -Contimi ed Canada Continued Manitoba Continued Manitoba Continued Middle Devonian Precambrian Continued Dawson Bay formation * (sub­ Noriss granite 2 surface) Oxford group 2 Mafeking formation a Ralph Lake conglomerate a Winnipegosis formation > Reed granite a Silurian or Lower Devonian Rice Lake series * Ashern formation 2 San Antonio formation a Silurian Sherridon group a Interlake group a series 1 Port Nelson limestone l Snow group a Stonewall limestone l Squall Lake granite a Tapukok granodiorite a Ordovician Vamp Creek granodiorite a Nelson limestone 1 Wallace Lake granite a limestone l Wanipigow diorite 2 Selkirk limestone 1 Wasekwan series a Shammattawa limestone 1 Wekusko group l Stony Mountain limestone l Wekuskoan group 2 Upper Ordovician New Brunswick Birse member (of Stony Moun­ Quaternary tain formation) 2 Grand Falls drift a Cat Head limestone l St. Jacques drift 2 Dog Head limestone * Triassic Gunton member (of Stony Moun­ Lepreau formation a tain formation)* Quaco conglomerate * Penitentiary member (of Stony Carboniferous Mountain formation) 2 Bathurst formation l J (subsur­ Boyd series l face in Williston basin, U.S.) Hillsborough series 1 Stony Mountain formation l (sub­ Red Head formation l surface in Williston basin, U.S.) Weldon series * Stony Mountain shale member Woodstock conglomerate * (of Stony Mountain forma­ tion)' Upper Carboniferous Courtenay Bay formation a Middle Ordovician Cranberry Point formation a Winnipeg sandstone 1 (subsur­ McCoy Head formation a face in Williston basin, U.S.) Partridge Island formation a Cambrian Tynemouth Creek formation a Churchill arkose sandstone l Post-middle Carboniferous Precambrian Chance Harbour granite a Aikens Lake granite a Lower or Upper Carboniferous Alberts Lake granodiorite 3 Hammond River formation 2 Amisk group or series * Lower Carboniferous Assean Lake series 2 Boar Head formation a Beresford phase x Kennebecasis formation or series2 Bird River intrusive complex a Pr e- Carboniferous Black Trout diorite 2 Caledonia group l Bulger Lake granite 2 Duck Lake gabbro a Churchillian group * Fairville granite 2 Cliff Lake granite porphyry » Germaine Brook granite 2 Cross Lake group * Golden Grove intrusives a Dismal Lake granodiorite-gneiss * Grand Lake formation l File granite 2 Indiantown gabbro 2 Ham granite 8 Kennebacasis granite 2 Hayes River group l Mayflower Lake quartz diorite a Hughes Lake conglomerate a Milkish Head granite and grano­ series l diorite 2 Kaminis granite ' Portland series * Kiski volcanics l Rockwood Park granodiorite a Laguna series a Pennsylvanian Manigotagan granite * Clifton formation * Naosap granodiorite a Coal Creek formation * Nekik granodiorite a Enragg formation 2 Nokomis group 8 Grande Anse formation 2 588 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued New Brunswick Continued New Brunswick Continued Pennsylvanian Continued Upper Silurian Hurley Creek formation * Jones Creek formation * Macdonald Glen formation * Long Reach formation * Minto formation * Post-Ordovician Newcastle Creek formation * Austin Brook quartz porphyry x Petitocodiac series x Ordovician to Devonian formation * Fournier group l Salisbury formation * Ordovician Scoudouc formation * Beccaguimic formation * Shepody formation 2 Millstream series * Sunbury Creek formation * Tetagouche series l Tormentine formation a Ordovician(f) Pennsylvanian or older Charlotte group a Hardwood Ridge flow a Lower Ordovician Mississippian and (or) Pennsylva­ Navy Island formation 3 nian Suspension Bridge formation a Balls Lake formation a Cambrian (see also Precambrian or Maringouin formation * Cambrian) West Beach formation * Narrows formation a Mississippian Upper Cambrian Albert formation * Agnostus Cove formation 2 Demoiselle formation » Black Shale Brook formation2 Gautreau formation > Middle Cambrian Memramcook formation * Fossil Brook formation * Moncton group 2 Hastings Cove formation a Upham formation 2 Loch Lomond series a Weldon formation l Porter Road formation a Devonian or Carboniferous St. Jean group * formation 1 St. John group * Lancaster formation x St. Johns shales * Devonian (see also Silurian or Lower Cambrian Devonian; and Ordovician to Etcheminian series 1 or group * Devonian) Glenn Falls formation a Barberie andesite l Hanford formation * Bon Ami andesite 1 Hanford Brook formation * Campbellton formation » Hanfordian series * Inch Arran latites * Ratcliffe Brook formation a Maple Green andesite l Precambrian or Cambrian Mispec group > Coldbrook group 1 Restigouche volcanic series * Precambrian Saint George granite or plu- Coastal group * tonics a Green Head formation a Scauminac formation a Kingston group * Stewart andesites 1 Portland group * Sugar Loaf dacites * Robin Hood formation a Devonian(t) Saint John volcanics a Nipisiguit granite x St. Martins intrusives and ex- Middle Devonian(f) trusives 2 Lepreau diorite 3 Musquash granite * Age(f) Lower Devonian Gauvin andesite l Dalhousie shales » Newfoundland (proper) Silurian to Mississippian Carboniferous Coal Creek formation > Humber grit series * Silurian or Devonian Upper Carboniferous Little River group 1 Barachois series 2 Silurian and Devonian (?) Mississippian Mascarene series * Anguille series a Silurian Aquathuna limestone a Belledune group 1 Black Point formation or lime­ Dalhousie limestones l stone a Elmtree slates : Boswarlis beds 3 Oak Bay formation 2 sandstone 2 Turgeon formation 1 Cape Rouge series a INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 589

Cana da Continued Canada Continued Newfoundland (proper) Continued Newfoundland (proper) Continued Mississippian Continued Silurian Continued Codroy breccia 2 Pike Arm formation 2 Codroy series 2 Pikes Island conglomerate a Codroy shale * Sops Island member (of Natlins Cormorant limestone 2 Cove formation) 2 Crabbs limestone a Silurian(?) Deer Lake (group) 2 Baie d'Espoir series a Fishells conglomerate 2 Springdale formation a Fishels limestone 8 Heatherton limestone 2 Upper Silurian or younger Highlands sandstone 2 Garrison Hills granite 2 Humber Falls formation 2 Post-Ordovician Jeffreys limestone 2 North Brook granite 2 Rocky Brook formation a Twillingate granite 2 Seacliffs sandstone 2 Ordovidan (see also Cambrian and Searston beds 2 Ordoviciari) Ships Cove limestone 2 Andersons Cove slates 2 Snakes Bight shale 2 Baie Verte formation a Spear Point formation 2 Bide Arm formation 2 Woody Cove shale 2 Breakheart basalt 2 Woody Head beds 2 Cape St. John group a Woody Point sandstone 2 Cutwell group 2 Devonian or Mississippian Deadmans Cove member (of Rencontre formation 2 Giles Cove formation) 2 Devonian(?) or Carboniferous(f) Englee formation 2 Smiths Hole conglomerate 2 Exploits series 2 Devonian Fortune tuffs and cherts a Baggs Hill granite 2 Foulke Cove slate and shale 2 Burlington granite 2 Giles Cove formation a Cape Brule granite 2 Goose Tickle slate 2 Chetwynd granite a Gravel Head formation 1 Dolman gneiss 2 Hornet conglomerate 2 Dunamagon granite 2 Ireland Point volcanics (in Maid­ La Poile group 2 en Point sandstone) 2 Roti granite 2 Jacksons Arm conglomerate Devonian (?) member (of Giles Cove forma­ Colchester granodiorite-quartz di- tion) 2 orite 2 Lawrence Harbour shale 2 Dollond Arm Head quartz di- Luke Arm formation 2 orite 2 Maiden Point sandstone 2 Grand Beach rhyolite-pprphyry 2 Mortons volcanics 2 Mansfield Head granodiorite 2 Nippers Harbour group 2 North Bay granite 2 Northwest Arm formation 2 Northern Bight granite 2 Parsons Pond beds 2 Powder Horn diorite 2 Round Head breccia 2 South Brook biotite-quartz-mon- St. Pauls group 2 zonite 2 Sansom graywacke and quartz 2 Lower or Middle Devonian Simms Ridge shale 2 Bay du Nord group 2 Sivier formation 2 Lower Devonian Snooks Arm series 2 Clam Bank series 2 Taylors Pond shale member (of Pre- Devonian Giles Cove formation) 2 Keepings gneiss a Ordovician(f) Victoria River series a Belle Bay volcanics 2 Post-Silurian Brent Island limestone 2 Ackley granite 2 Burin series 2 Silurian Farewell group 2 Botwood formation 2 Fogo group 2 Gander Lake series 2 Goose Cove schist 2 Goldson formation 2 Goss Pond volcanics 2 Herring Head conglomerate 2 Little Lawn formation 2 Indian Island group 2 Long Harbor series 2 Natlins Cove formation 2 Lushs Bight group 2 Notre Dame series 2 Mings Bight formation 2 590 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Newfoundland (proper) Continued Newfoundland (proper) Continued Ordovician (?) Continued Cambrian (see also Precambrian and Mooring Cove volcanics 2 Cambrian) Mount Margaret volcanics 2 Beaver Brook shale 2 Pilleys series 2 Belle Isle shale ' Red Cliff volcanics 2 Chamberlins Brook formation l Wellmans Cove diorite 2 Doucers marble and limestone 2 Upper Ordovician or Devonian Grand Lake Brook series 2 Blow-me-down complex 2 Kippens formation 2 Middle and Upper Ordovician Long Pond formation » Canada Head formation 2 Newfoundland series l Humber Arm series x Random Sound series * Post-Middle Ordovician St. Johns slate l Bay of Islands complex 3 Youngs Cove group 2 Bluff Head volcanics 2 Upper Cambrian Mount Barren metamorphic com­ East Arm formation 2 plex 2 Elliot Cove formation * Middle Ordovician March Point formation * Cooks limestone tongue (of Middle Cambrian Humber Arm series) 2 Cloud Rapids formation 2 limestone breccia l Killigrews Brook formation 1 (see Hare Island limestone 2 also Kelligrews Brook forma­ Long Point series l tion i) Portland Head group 2 Manuels formation * Table Head series * Petit Jardin formation 3 Middle Ordovician(f) Treytown Pond formation 2 Badger Bay series 2 Middle(f) Cambrian Beaver Bight formation 2 Sound Island formation * Burtons Head group 2 Lower and Middle Cambrian Crescent Lake formation 2 Fortune Brook formation * Gull Island formation 2 Lower Cambrian Julies Harbour group 2 Bonavista formation l Roberts Arm volcanics 2 formation l Shoal Arm formation 2 Devils Cove formation 2 Wild Bight volcanics 2 Doten Cove formation 2 Lower Ordovician Goose Cove formation 2 Apsey formation * Hawke Bay formation * or Beach formation ' quartzite 1 Bell Island series 1 Placentia * (terrane) Brown Mead formation > Pools Cove formation 2 Chimney Arm formation 2 Smith Point formation * Clarenville series * Terra Nova l (series) Dominion ore bed * Lower Cambrian and Precambrian(f) Eastern Head formation 1 Dantzic group 2 Green Point series * Precambrian and later Kelly Island formation 1 Terranovan l (series) Lance Cove formation x Precambrian and Cambrian Little Bay Head lavas 2 Bay d'Est formation 2 Little Bell Island formation x Bull Arm felsite member (of McGraw bed 1 ) 2 Maidment formation * Cloud Mountain series 1 Salt Water Fund series l Redmond formation l Spoon Cove formation 2 Riders Brook formation l Spyglass Cove formation * St. George series l Tilt Point formation 2 Scotia ore bed x Precambrian Southern Arm limestone 2 Avalon group l Wabana series l Avalonian formation l Western Arm basalts or group 2 Avondale volcanics l Western Brook Pond group 2 Barrys zone (in Headland gneiss) 2 Cambrian or Ordovician Birchy schist 2 Buchans series * formation 2 Waban formation l Cabot group * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 591

Canada Continued Canada Continued Newfoundland (proper) Continued Newfoundland (Labrador) Con. Precambrian Continued Precambrian Continued member (of Logy Duley Lake group * formation) 2 Ferriman series 2 Capta zone (in Headland gneiss) a Hamilton series 2 formation 2 Harp Lake anorthosite 2 Cloud River granite 2 Holyrood granite 2 Conception slate * Hopedale gneiss 2 Connecting Point group 2 Kaipokok gneiss 2 Fleur de Lys group 2 Kaniapiskau series 2 Fresh Pond granodiorite 2 Kaumajet volcanic series 2 series l Makkovik granite 2 Great Harbour Deep granite 2 Mealy Mountains anorthosite 2 Halls Town formation 2 Mountignais formation 2 volcanics 2 Mugford series 1 Headland gneiss 2 Nain anorthosite 2 Hibbs Hole formation 2 Point series 2 Highlands formation 2 Ramah series 1 Hodgewater group 2 Red Wine anorthosite * Lanse a Loup series * Sandgirt Lake formation * Lince-a-Jardin member (of Logy Sims group 2 formation) 2 Strawberry granite 2 Logy formation 2 Wapussakatoo group l Lue Point member (of Logy Zebra slate 2 formation) 2 Northwest Territories (Franklin) Momable slates l Cretaceous or Cenozoic Pardee gneiss 2 Eureka Sound group 2 Partridge granite 2 Cretaceous or Tertiary (f) Pigeon gneiss 2 Intrepid Bay formation 2 Random formation * Lower Cretaceous or younger St. Lawrence granite 3 Christopher formation 2 Signal Hill formation * Hassel formation 2 Shoalrocks gneiss 2 Isachsen formation 2 Snows Pond formation 2 Lower Cretaceous Starboard gneiss 2 Deer Bay formation 2 Torbay slate l Lower Jurassic(f) Whiteway formation a Cape With formation 2 Woody Cove member (of Logy Middle to Upper Triassic formation) 2 Blaa Mountain formation 8 Ygol member (of Logy forma­ Paleozoic (see Precambrian or Paleo­ tion) * zoic) Precambrian(f) Upper Paleozoic or Mesozoic Musgravetown group 2 Disappointment Bay formation 2 Rattling Brook group 2 Permian Age(f) Greely Fjord group 2 Humber limestone 1 Permian or older Newfoundland coal formation 1 Sail Harbor group 2 North Arm complex 2 View Creek group * Port au Port shale and gritstone * Carboniferous or Permian Trinity Bay sandstone ' Feilden group 2 White Bay group 2 Guide Hill group 2 Newfoundland (Labrador) Middle Pennsylvanian Quaternary Canyon Fjord formation 8 Labrador formation * Devonian Paleozoic Dana Bay beds 8 Double Mer sandstone * Snowblind1 Bay formation 2 Cambrian Silurian and Ordovician(f) L'Anse au Loup limestones * Lower Cambrian Alien Bay formation 2 Bradore formation l Ordovician and Silurian Forteau formation l Read Bay formation 8 Labrador series 2 Ordovician Precambrian Cape Baird limestone 8 Aillik formation * Putnam Highland formation 8 Domino gneiss * Thorup Fjord limestone 8 592 GEOLOGIC NAMES OF NORTH AMEEICA

Canada Continued Canada Continued Northwest Territories (Franklin) Northwest Territories (Mackenzie) Continued Continued Upper Ordovician Upper Devonian Continued Cornwallis formation 2 Kee Scarp limestone member (of Silliman Mount formation * Fort Creek formation) 2 Middle or Upper Ordovician Trout River formation 2 limestone 2 Middle Devonian Lower Ordovician Amco horizon (of Slave Point Mingo River formation * formation) 2 Nadlo Point limestone * Silurian or Devonian Middle Cambrian Bear Rock formation 2 Bear Point limestone * Silurian Ooyahgah formation 2 Bear Mountain formation ! Lower Cambrian formation l Police Post limestone * Fitzgerald limestones l Rabbit Point sandstone 8 Lone Mountain dolomite l Precambrian or Paleozoic Mount Kindle formation l Cape Columbia group 2 North Nahanna River dolomite * Mount Disraeli group 2 Ronning group 2 Northwest Territories (Keewatin) Ordovician Precambrian Sunblood formation 8 Belcher series l Cambrian Belcher Island series 2 Macdougal group 2 Dubawnt group 2 Saline River formation 1 Hurwitz group 2 Middle Cambriqn Keepalloo iron formation 1 Mount Cap formation 1 Marble Island quartzite 8 Cambrian and (or) older Tookcarak diabase * Katherine group 2 Northwest Territories (Mackenzie) Precambrian Cretaceous Akaitcho flow (in Yellowknife Meander shales * group) 2 Mountain shales 1 Baker Creek member (in Yellow- Rabbitskin sandstone * knife group) 2 Upper Cretaceous Bode conglomerate 2 East Fork formation or series 2 flow (in Yellowknife Little Bear formation 2 group) 2 Slater River formation 2 Brock group 2 Lower Cretaceous Cameron Bay series > San Sault group 2 Charlton group 1 Devonian Coppermine River series * Beavertail limestone 1 Drill Camp flow (in Yellowknife Bosworth sandstone and shale * group) 2 Camp Creek series 1 Echo Bay series 1 Carcajou Mountain beds * Epworth dolomite 1 _ Fort Creek shale 1 Et-Then series * Hare Indian River shale * Fox flows 2 Hare River shales 1 Goulburn quartzite 1 Horn River shales * Great Slave group * Mount Charles formation 1 Hornby Bay series 2 Pine Point limestone * Kahochella formation 8 Presqu'ile dolomite * Kanuyak formation * Rampart limestone * Lindsley Bay granite porphyry 1 Simpson shale l Lone Land formation 1 Slave Point limestone 1 Marian group 2 Upper Devonian Millsite flow (in Yellowknife Alexandra formation 2 group) 2 Canyon sandstone (in Fort Creek Murky conglomerate * formation) 2 Negus flow 2 Carcajou series 2 Nob Hill flow (in Yellowknife Grumbler formation 2 group) 2 series 2 Nonacho series 2 Imperial formation * Pearson formation 2 Jungle Ridge limestone member Pekanatui series 1 (of Fort Creek formation) 2 Pethei formation 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 593

Canad a Continued Canada Continued Northwest Territories (Mackenzie) Nova Scotia Continued Continued Carboniferous (see also Devonian or Precambrian Continued Carboniferous) Point Lake phase (of Point Lake- Riversdale formation 1 Wilson Island group) 2 Shulie formation 1 Point Lake-Wilson Island group 2 Smalls Brook limestone * Powder House flow (in Yellow- Smelt Brook formation 1 knife group) 2 Stellarton formation * Preble formation 2 Westville formation l Prosperous Lake granite 2 Pennsylvanian (see also Mississip- River Lake granite 2 pian or Pennsylvanian) Runa Lake granodiorite 2 Albion member (of Stellarton Snare group 2 series) 2 Snowdrift series * Boss Point formation l Sosan formation 8 Broad Cove formation * Staff House flow (in Yellowknife Canso series 2 group) 2 Cape Dauphin formation * Stalk group l Coal Brook member (of Stellar- Stark formation * ton series) 2 Stock flow a Cumberland series l Tazin series l Harrington River formation 1 Teshierpi granite a Hawkesbury series 2 Tochatwi group l Inverness formation a Townsite flows 2 Lismore formation 1 (also as Union Island group 2 Listmore formation J) Wilson Island phase (of Point Mabou Mines formation 8 Lake-Wilson Island group)* McLellan Brook sub-member (of Yellorex flow a Thorburn member of Stellar- Yellowknife group 2 ton series) 2 Age(f) Marsh Brook submember (of Coppermine series * Thorburn member of Stellar- Nova Scotia ton series) 2 Pleistocene Morien series 1 Bridgewater conglomerate 2 Parrsboro formation 1 Triassic Point Edward formation 1 Annapolis formation 1 Port Hood coal measures l Blomidon shale * Riverside series 2 Cape Spencer flow 2 . St. Ann formation a Five Islands volcanics * Shale Brook submember (of Grande Pre formation l Thorburn member of Stellar- North Mountain basalt l ton series) 2 Scots Bay formation l Skinner Brook member (of Stel­ Wolfyille sandstone * larton series) 2 Carboniferous (see also Devonian or Thorburn member (of Stellarton Carboniferous) series) 2 Canary lime ' West Bay formation 2 Cape John formation 1 Lower Pennsylvanian Gaspereau formation * Millsville conglomerates * Hopewell sandstone * Pennsylv anian (?) Horton Bluff formation l Claremont formation 2 Joggins formation * MacFarlane redbeds 1 Mabou formation 1 Middle Bridge formation l Merigomish formation l Mississippian or Pennsylvanian Middleborough member 1 (of Scotch Village formation 2 River John series) Ainslie sandstone l formation 1 Ardness formation * Millsville member l (of Lismore Avon River limestone * formation) Cheverie formation l New Glasgow conglomerate * Grantmire member (of Windsor Pictou formation * series) 2 Pictou freestones * Horton series 1 Plymouth member 1 Judique series * Ribbon limestone * Kennetcook limestone * 594 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Nova Scotia Continued Nova Scotia Continued Mississipian Continue d Middle Cambrian Continued McAras Brook formation l Dugald formation 2 Macumber formation 2 Dugald Brook series 2 Maxner limestone 1 Dugaldian series 2 Miller limestone ! Eskasoni formation 2 Pembroke formation 2 Gregwa formation 2 River John series 1 Kelvin Glen group 2 Tennycape formation 2 MacLean Brook formation 2 Windsor group l MacMullin formation 2 Trout Brook formation 2 Dunbar series * Middle Cambrian(f) Kewstqke conglomerate l Myrabayan series 2 Lower Mississippian Lower Cambrian Pilier conglomerate and sand­ Canoe Brook formation 2 stone 2 MacCodrum formation 2 Devonian or Carboniferous Morrison River formation 2 Union formation l Precambrian or Cambrian Devonian Goldenville formation * Bear River formation 2 Halifax formation * Knoydart formation * Whiterock quartzite * Lower or Middle Devonian McAdam Lake formation 2 Precambrian Silurian or Lower Devonian Fourchu group 2 Middle River group 2 George River series * Silurian Meguma series 1 Arisaig series 1 Precambrian(f) Beechhill formation l Clyburn formation 1 Beechhill Cove formation l Ingonish gneiss * Cobequid series l Age(?) Kentville formation l Chegoggin Point formation l McAdam formation l Franey granite 1 Moydart formation 1 George River limestone 1 Nictaux beds 2 South Mountain granite 2 Ross Brook formation * Ontario Stonehouse formation * Pleistocene Torbrook sandstone 1 Algoma sand J Silurian(f) Artemisia gravel l New Canaan formation * Clarke interglacial * (sands and Ordovician clays) Baxters Brook formation J Don beds (in Toronto forma­ Browns Mountain group l tion) 1 James River formation * Erie clay l Malignant Cove formation 1 Irpquois clay l Stewart Brook formation 2 Nipissing clay l Lower Ordovician(f) Patrician drift l James River granite 2 Saugeen clay J Lower Ordovician and Upper Cam­ Scarboro beds l brian^) Toronto formation 1 McLeod Brook formation 2 Warren gravel l Cambrian (see also Precambrian or Upper Jurassic or Lower Cretaceous Cambrian) Mattagami series l Atlantic Coast series J Devonian Barachois slate 1 Abitibi River formation 1 Bears Brook formation 1 Arkona beds l Guysborpugh formation l Ipperwash limestone 1 Mira series or formation l Ipperwash limestone member l Cambrian and older(?) (of Hamilton formation) Morrison formation 2 Long Rapids shale 1 Upper Cambrian Norfolk formation 2 Bretonian l (series) Petrolia shale l MacNeil formation 2 Petrolia shale member (of Ham­ Middle Cambrian ilton formation) 1 Bourinot group 2 Port Lambton beds l Coldbrookian series 2 Sextant formation 1 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 595

Canada Continued Canada Continued Ontario Continued Ontario Continued Devonian Continued Lower Silurian Continued Thunder Bay shales * Keppel dolomite l Widder beds 1 member (of Williams Island limestone l Cataract formation) 1 Upper Devonian Power Glen formation 8 Kettle Point black shale 8 St. Edmund dolomite lentil (of William Island formation 8 member) 1 Middle Devonian Thoroid sandstone member (of member (of Albion sandstone) 1 Lucas formation); (as member Ordovician (see also Cambrian and of Detroit River dolomite l) Ordovician) Decewsville formation J Billings formation 2 Hungry Hollow formation * Blue Mountain formation * Springvale sandstone 1 Christie member (of Dundas Lower and Middle Devonian formation)1 Moose River formation * Coboconk limestone * Silurian Cobourg limestone 1 Attawapiskat coral reef * Cragleith formation 8 Attawapiskat limestone 1 Danforth member (of Dundas Barton beds 1 formation) 1 DeCew limestone l Eastview formation 8 Ekwan limestone l Haileybury formation l Ekwan River limestone l Kirkfield limestone group * Eramosa member l (of Lockport Liskeard formation 1 formation) Nottawasaga group 2 (subsurface) Gait limestone * Ottawa beds l Kenogami River formation l Picton formation l Pagwa River formation 1 Rideau sandstone l Severn limestone * Rouge River formation 8 Severn River limestone * St. Marys sands 1 Wabin formation 1 Simcoe group 2 (subsurface) Wingfield formation a Verulam formation 2 Middle Silurian Vincent member (of Meaford Albemarle group 2 formation) ' Amabel formation 8 Whitby group 2 (subsurface) Ancaster member (of Eramosa Winnipeg limestone 1 formation) 2 Upper Ordovician Assignack member (of Burnt Carlsbad formation 2 Bluff formation) 2 Collingwood formation * Billings member (of Burnt Bluff Credit member 1 (of Dundas formation) 2 formation) Colpoy Bay member (of Amabel Davenport member * (of Dundas formation) 2 formation) Fossil Hill formation 2 Don River member 1 1 Dundas formation 1 Lion Head member (of Manis- Erindale member * tique formation) 2 Humber member J (of Dundas Speedwell member (of Eramosa formation) formation) 2 Humber River 1 (member) Suspension Bridge member (of Kagawong beds l Lockport dolomite) 2 Meadowvale member l Wiarton member (of Gasport Meaford member l formation) 2 Queenston shale 1 Lower Silurian Rosedale member * (of Dundas Bidwell member (of Cataract formation) formation) 2 Russell formation 2 Cabot Head shale member (of Sheguindah beds l Cataract formation) 1 Streetsville member * Cataract formation 1 Wekwemikongsing beds l Dyer Bay dolomite lentil (of Middle Ordovician Cabot Head shale member) 1 Cloche Island beds * Grimsby sandstone J Glenburnie member (of Chau- Kagawong member (of Cataract mont formation) * formation) 1 Gull River formation * 504835 59 13 596 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Ontario Continued Ontario Continued Middle Ordovician Continued Precambrian Continued Hallo well member (of Cobourg Cobalt series l formation) 2 Cobalt tillite or conglomerate (in Hillier member (of Cobourg Gowganda formation) 2 formation) 2 Confederation granophyre * formation 8 Coniston series 2 Napanee member (of Rockland Copper Cliff arkose * formation) 2 Cosmo series 2 Rockcliffe formation 2 Creighton granite 2 Rockland formation l Crowduck Lake conglomerate l Selby member (of Rockland Daredevil formation l formation) 2 Deer Lake syenite 2 Shadow Lake formation 2 Deloro group 2 Swift Current beds * Dobie volcanics 2 Lower Ordovician Dome conglomerate 1 March formation 2 Dome dacite (in Vipond forma­ Oxford formation 2 tion) 2 Lower Ordovician and Upper Cam- Dore" conglomerate 1 Dore" series l Nepean sandstone 2 Driving Creek formation l Cambrian and Ordovician Duncan greenstone 1 Battlemill beds 2 Dysart granite gneiss 2 Brockville beds 2 formation 2 Maitland beds 2 East Bull Lake gabbro 2 Prescott series 2 slate 1 Upper Cambrian Elsie Mountain greenstones a Sault St. Mary sandstones l Espanola granite * Precambrian Espanola graywacke l Abram conglomerate 1 Espanola limestone * Abram series 1 Frood series 2 Acme porphyry 2 Ghost Range complex 2 fAgawa iron-formation member Gillies Lake porphyry 8 (of Knife Lake slate) l Glamorgan gabbro 1 Ament Bay arkosites l Glamorgan granite gneiss 8 Animikie group l ; group in Min­ Goldale formation 2 nesota, series in Michigan Gold Centre series * Anstruther granite gneiss 8 Gowganda formation l Atic Oban series 1 Grassy Island granite gneiss l Atikokan series * Green Lake limestone * Attewell Lake gabbro 2 Grenville series l Aweres formation l Gros Cap greenstone l Bad Vermilion Lake granite l Gullwing Lake conglomerate * Batchawana series * Gullwing Lake volcanics 2 Belmont amygdaloidal basalt and Hallnor conglomerate 2 tuff 1 Handy Lake volcanics l Birch Lake series l Hardrock "porphyry" 2 Blessington gabbroic anorthosite 2 Hastings series l Boulter gabbro 2 Helen iron-formation * Boulter granite 2 Hill group 2 Brockville granite l Hinchinbrooke granite 8 Brownridge sediments 2 Howey diorite 2 Brownridge volcanics 2 Hoyle sedimentary series 2 Bruce conglomerate 1 Huronian series 1 Bruce series l Island Lakes gabbroic anortho­ Burleigh granite gneiss 2 site 2 Caribou complex 2 Jackfish Lake conglomerate l Carpenter sediments 2 Juttan volcanics l Carpenter volcanics 2 Kakabeka formation * Central series 2 Kaministikwia group l (see also Centre Hill complex 2 Kaministiquia formation l) Centre Lake leuco-granite gneiss 2 Kashabowie series 2 Chelmsford sandstone l Kennebec volcanics 2 Clarabell granite 2 Kenoran volcanics 2 Clearwater volcanics 2 Kiask series x INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 597

Canada Continued Canada Contir.ued Ontario Conti nued Ontario Continued Precambrian Continued Precambrian Continued Killarnean granites 2 Seine River series * Killarney granite * Serpent quartzite J Krist fragmental (unit) 2 Shabu series 1 Lac Seul series * Shoal Lake conglomerate * Larder Lake series 1 Sibley series * Levack granite 2 Silver Lake granite 2 Linklater formation 2 Slate Lake series 2 Long Lake diorite 1 Snider series 2 Lorrain granite * Soo series * Lorrain quartzite 1 Soultan series * Mclntyre series l Steep Rock series or group * MacKenzie Island graywacke 2 Steep Rock Lake series l McKim graywacke l Stobie series 2 Mallard Lake metagabbro 2 Sudbury norite * Mamainse diabase 1 Sudbury meries * Mallorytown granite 1 Sudbury-Bruce series 2 Marshall Lake series 1 Swayze series 2 granite 2 Tait volcanics 2 Matachewan series l Thanet gabbro 1 Mather sediments 2 Thessalon group * Meach Lake conglomerate 2 Thunder Bay slates l Miller Lake porphyry 2 sediments 2 Millerton porphyry 2 Thunder River volcanics 2 Miminiska series 2 Tichborne) gabbroic anorthosite 2 Mining Mountain granite gneiss 2 Tichborne-Buck Bay granite and Miniss series * alaskite 8 Mississagi quartzite 1 Tisdale group 2 Moira granite * Tot-Gullwing Lakes granite 2 Monck Lake leuco-granite gneiss 2 Trembling Lake limestone l Mud Lake granite * Trout Lake conglomerate 1 Murray granite 2 Uchi series 2 Neepawa volcanics 2 Umfraville gabbro 1 Newfield diabase 2 Varennesic period * Nipogon group 1 Vermilion-Bluett Lakes con­ Oconto gabbroic anorthosite 2 glomerate 8 Olden gabbro 2 Vermilion-Centrefire Lakes vol- Onaping tuff l canics 2 Onwatin slate * Victoria gabroic anorthosite 2 Osier series 1 Vipond series 1 Ottawa gneiss l Wabigoon volcanics 2 Ottertail white quartzite J Wanapitei quartzite l Pamouf conglomerate 2 Wanipigow series » Parham gabbro a Warclub ]l

Canad a Continued Canada Continued Quebec Continued Que bee Continued Middle Silurian Upper Ordovician Continued Anse Gascon formation 2 Pabos formation * Mount Alexander series 2 Whitehead formation 1 Ordovician or Silurian Middle and Upper Ordovician Ladystep volcanics * Mictaw series l Moulton Hill granite 2 Middle and Upper(f) Ordovician Ordovician Stanbridge slate l Basswood Creek formation 1 Middle Ordotician Beauceville series 1 Ayers Cliff formation 2 Beauharnois formation 1 Blondeau limestone conglomer­ Becancour River formation 2 ate 2 Bedford formation J Caughnawaga member (of Laval Breault member (of Nicolet River formation) 2 formation) 2 Galet beds 2 Carmel River member (of Becan­ Hull limestone l cour River formation) 2 Laval formation 2 Charleton formation 1 Mile End formation 2 series 1 Montreal formation 2 Compton formation * Ouareau transition beds 2 Corey limestone * Rosemount member (of Montreal Ellis Bay formation 2 formation) 2 English Head formation » St. Domini que formation 8 Eustis-Moulton Hill series 2 St. Martin formation 2 Farnham limestone * St. Michel member (of Montreal Gamachian series l formation) 2 Iberville formation * Sainte The'rese member (of Laval Lachine formation a formation) 2 Lacolle conglomerate l Shipshaw beds 2 Leclercville shale a Simard beds 2 Lotbinie're shale a Stony Creek formation 2 Magog formation l Terrebonne formation 2 Matapedia series 1 Tetreauville formation 8 Mingan formation 1 Tremblay beds 2 Mystic * (formation) Lower Ordovician Nicolet River formation 2 Aylmer formation 1 Pierreville member (of Becancour Hastings Creek formation * River formation) 2 Large Island beds (of^Romaine Pohenagamuk formation l formation) 2 Pontgrave1 River formation 2 Luke Hill limestone 1 Quebec City formation 1 Magog conglomerate * Romaine formation 1 Matane shale 2 St. Armand limestone l Metis shale 2 St. Francis series 2 Nay lor Ledge formation 1 Sr. Hilaire member (of Nicolet Pillage Bay sandstone (of Ro­ River formation) 2 maine formation) 2 St. Marc limestone J Pillar sandstones 2 Sherbrooke series 2 Quarry Island beds (of Romaine Tomif obia slates and limestone l formation) 2 Vaurial formation 1 Solomons Corner limestone * Wallace Creek formation * Tpurelle sandstone 2 Ordovician(?) Ville Guay conglomerate 8 Cabano conglomerate * Lower Ordovician and older(f) Frontiere group 2 Philipsburg series 1 Gagne Brook series l Pre-Ordoyician Maquerean series 1 Coleraine se-ries 8 Shickshock formation l Pre-Ordovician (f) Weedon schist * Frontenac formation l Upper Ordovician Stoke granite 2 Cape Blanc formation 1 Weedon porphyry 2 Cape Canon formation 1 Cambrian or Ordovician Limekiln conglomerate 1 Lauzon formation l Little Indian Pool beds 2 Macquereau series l Macastey black shale * I Sillery formation * 600 GEOLOGIC NAMES OF NORTH AMERICA

Canada Continued Canada Continued Quebec Continued Quebec Continued Cambrian and Ordovician Precambrian Continued Cape Rosier beds 2 Bourlamaque granpdiorite 2 Carillon limestone 2 Brassier-Bollard biotite granite r Chatham limestone 2 Bristol series * Lachute beds 2 Broadback series 1 Levis formation * Brock series > Missisquoibay series 2 Broughton series 1 Rigaud passage beds 2 Buckingham gneiss l St. Flavien basic eruptives 2 Buit Lake granite 2 Cambrian Cache Lake gabbro J L'lslet formation l Cadillac group 2 Manitounuck group 1 Capisisit Lake granite 2 Mistassini formation l Cedar Rapids granite 2 Pinnacle graywacke * C61oron granite 2 Pointe Leyis group 1 Chadbourne series l Redoute limestone * Chertsey facies (of Morin an­ Sutton schists * orthosite) 2 Cambrian(f) Chibougamau complex l Armagh group 2 Chioack conglomerate-sandstone * Caldwell series * Claverny albite granodiorite 8 Kamouraska formation * Cl6ricy granodiorite 2 Rosaire group 2 Ctericy sediments 2 Upper Cambrian Cl^ricy porphyritic syenites * Mansonville slates 1 Coom Lake diorite-gabbro 2 Murphys Creek formation l Dalquier granite 2 Oak Hill slate » Dastur metagabbro 2 Rock River formation * Dauversidre granite 2 Strites Pond formation l David Lake group 2 Lower Cambrian Davy Lake breccia 2 Bunker slate 1 Denault dolomite 2 Call Mill slate » Dor6 Lake group 8 Charny formation 2 Doublet group 2 Dunham dolomite * Dufault diorite and quartz dio- Dunmore quartzite 2 rite 2 Oilman quartzite l Dufault granodiorite 2 Melbourne limestone 2 Duparquet sediments 2 Scottsmore quartzite l Duverny granite 8 Sweetsburg slate 1 Pabre series l Vail slate l Fiedmont granodiorite 2 West Sutton slate 1 Figuery granodiorite 2 White Brook dolomite l Fenimore iron formation 2 Lower(?) Cambrian Flavrian granite 2 Corner-of-the-Beach formation * Fleming chert breccia 2 Precambrian, Cambrian, and Ordo­ Fort Chimo group 2 vician Fourniere sediments 2 Quebec group 1 Glenwood series 2 Precambrian Grenville limestone * Abitibi group * Goeland granite 2 Albanel group 2 Goldvue quartz diorite 2 Aldermac syenite porphyry 2 Granada conglomerate 2 Alison quartzite 2 Granada greywacke 2 Ashuanipi complex or series 2 Guenette granite aplite 1 Attikamagen formation 2 anorthosite 2 Auger Lake conglomerate z Harricanaw series * Bachelor Lake granite 2 High Falls granite * Barraute gabbro 2 Holmes gneiss 2 Barry Lake gneiss 2 Home rhyolites 2 Beattie syenite porphyry 2 Howse group 2 Bell River anorthosite 2 Hub Lake syenite * Bennett quartzite * Josselin gneiss 8 Bernetz gneiss 2 Kastasakau complex 2 Billy Lake quartz porphyry 2 Kayrand quartz gabbro 2 Black River group 2 Kensington syenite 2 Blake River group 2 Kewagama group 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 601

Canada Continued Canada Continued Quebec Continued Quebec Continued Precambrian Continued Precambrian Continued Kinojevis group 2 Preissac granite 2 Kirkland Lake series * Preissac syenites 8 Kitchigama granite 2 Quinville granite 2 Knob Lake group 2 conglomerate * Koksoak series 2 Red Chute quartz diorite 2 LaBelle series 1 Richmond group 1 Labyrinth Lake granite 2 Richmond Gulf group 2 LaCorne hornblende - granodio­ Roberval (as Robervel) forma­ rite * tion * Lacoste series * Roberval (as Robervel) granite l Lake Evans series * Rolland granite 1 Lake Mistassini group 2 Rouyn Lake sediments a Lake Robertson granite 2 Ruth Lake formation 2 Landrienne gabbro-peridotite Saguenay formation 1 complex 2 Saint Jude igneous breccia * La Motte granite 2 Seaforth porphyry J La Motte-LaCorne granite J Seal Lake series J La Pause syenites 2 Seward grits J Laporte group J Siscoe granodiorite J La Reine granite J Sokoman formation 2 Lichen Lake granite 2 Soma gabbro 2 Loranger series 1 Stadacoma tuffs 2 Lorrain series * Strangway granite 2 Louvieourt granodiorite 2 Sutton Mountain series * McWatters group 2 Temiscamie group J Maikasagi River gneiss J Tibbit Hill schist » Malartic granodiorite 2 Tonnancourt quartz monzonite * Malartic volcanics 2 Trembling Mountain gneiss J Matagami series 1 Unison granodiorite 2 Menihek formation 2 Verneuil granite 2 Mildale gabbro J Wareham Lake series 2 Mistassini limestone l Waswanij)i granite J Moisie series J Wilson granite J Moose Lake granite 2 Wishart quartz ite J Morin series (F. F. Osborne, Precambrian(t) 1936, Quebec Dept. Mines Pentecote granite 2 Ann. Rept. 1935, pt. C, p. 63) Dalhousie Mountain andesites * Murdock group 2 Disraeli series 1 Nastapoka series J Maria latite * Nelson Lake granite 2 Nouvelle dacites l Nemenjish series l Rosenburg series J Newbec breccia 2 Thetford series 1 Newport albitized quartz dio­ rite 2 Pleistocene Nipissing diabase * Regina clay l Noranda Lake granite 2 Saskatchewan gravels * Obatogamau granite J Tertiary or Quaternary Okikeska series * South Saskatchewan gravels l Olga quartz diorite 2 Miocene, middle or upper Onslow syenite * Wood Mountain gravels * Opaoka River complex J Oligocene Opemiska granite * Cypress Hills beds l Opemiska series 1 Eocene Osisko Lake rhyolites J Roche Perc6e group l Ottawa gneiss * Swift Current formation * Palmarolle granodiorite J Eocene (?) Papaskwasati.group 2 Estevan formation l Pascalis-Tiblemont granodiorite J Eocene, upper Pine Hill syenite 2 Swift Current Creek formation * Pontiac schist 1 or group * Eocene, lower Port Harrison series J Willowbunch member (of Powell granite J Ravens crag formation) ' 602 GEOLOGIC NAMES OF NORTH AMERICA Canada Continued Canada Continued Saskatchewan Continued Yukon Continued Upper Cretaceous or Tertiary Tertiary or Pleistocene Ravenscrag beds 1 Carmack basalt 1 Upper Cretaceous Klusha intrusives * Battle formation 2 Tertiary (see also Triassic and Belanger member (of Bearpaw Tertiary) formation) 2 Flat Creek beds 1 Frenchman formation 2 Horsefly gravels 1 Oxarart member (of Bearpaw Hutshi group 1 formation) 2 Klondike drift J Thelma member (of Bearpaw 2 formation) 2 Skukum volcanic rocks 2 Whitemud formation ' Wheaton River volcanics l Jurassic Tertiary (?) Davidson formation^2 (subsur­ Chieftain Hill volcanics J face) Schwatka andesites * Gravelbourg formation 2 (sub­ Cretaceous surface) Perkins volcanics * Shaunavon formation 2 (subsur­ Tutshi series * face) Lower Cretaceous Dezadeash group 2 Vanguard formation 2 (subsur­ Jurassic or Cretaceous face) Laberge series * Watrous formation 2 (subsurface) NordenskiOld dacite 1 Devonian Upper Jurassic or Cretaceous Davidson evaporite 2 (subsur­ Quiet Lake intrusives J face) Tantalus conglomerate l Saskatchewan group 2 (subsur­ Upper Jurassic or Lower Cretaceous face) Mount Nansen group 2 Upper Devonian Upper Jurassic or Cretaceous(f) Duperow formation 2 (subsurface) Glenlyon granodiorite 2 Ordovician Jurassic and Triassic(f) Mush Lake group * Black Island member (of Winni­ Triassic to Tertiary peg formation) 2 Huishi-Schwatka group J Deer Island member (of Winni­ Triassic peg formation) 2 Lewes River series J Grindstone Point unit (in Winni­ Paleozoic(f) peg formation) 2 Moose Hide group * Precambrian Carboniferous or Permian Athona granite * Kaskawulsh group 2 Beaverlodge series 2 Carboniferous Brindson Lake granite 2 Raquet series l granite 2 Carboniferous (f) Churchillian group J Braeburn limestone * Elliot Bay conglomerate 2 Pennsylvaman to Lower Cretaceous Frontier Lake conglomerate 2 Orange group > Kenwood River granite 2 P re-Carboniferous Kisseynew gneisses J Harvey group 2 La Ronge group 2 ; Lac La Rouge Devonian or Carboniferous(?) series * Montague group * Lodge Bay granite 2 Ordovician Mackintosh Bay granite 2 Tatonduk shales 1 Missi formation 1 Cambrian Morin limestone * Hunker Creek series l Nistoassini-Nayelles Lakes granite 2 Indian River series J Pebble Island conglomerate 2 Cambrian(?) Waddy-Contact Lakes granite 2 Kluane schists 2 White Lake granite 2 Precambrian Yukon Pelly gneiss J Recent Razor Mountain group l Kluane silt 2 Yukon group l Slims Valley silt 2 Precambrian(f) Pleistocene and Recent Klondike series ! Selkirk volcanics 1 Mount Stevens group or series J INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 603

Canada Continued Mexico C pnti nued Yukon Continued Baja California Continued Age(f) Precambrian Hunker series l Volcan group * Indian River group l Campeche Moosehide diabase l No geologic formations with type Windy Arm series 1 localities in the State of Cam­ St. Pierre and Miquelon peche have been recorded in the Post-Cambrian Lexicon files. Galantry breccia * Chiapas Precambrian Miocene or Pliocene Cape series * Tenejapa formation l Mexico Miocene, upper Aguascalientes Simojovel formation l Cretaceous Eocene or Oligocene Onto limestone * Triunfo formation * Jurassic(f) Cretaceous Alta Mira limestone l Comitdn limestone J Age(f) Cristobal formation l Santa Francisea rhyolite * Petapa (formation) 2 Baja California Tuxtla formation l Quaternary Permian Tres Vfrgenes volcanics a Grupera formation * Pleistocene La Vainilla limestone * Santa Rosalia formation 2 Paseo Hondo formation * Tertiary Santa Rosa littoral marine for­ Cuesta formation 1 mation l Pliocene Age(?) Salada formation * Cintalapa beds a Pliocene, upper Chihuahua Infierno formation a Tertiary Marquer formation a Talamantes volcanic series a Pliocene, middle Tertiary, lower Carmen formation J Bufa rhyolite series * Gloria formation a Divisidero rhyolite series * Pliocene, lower Pliocene, upper Boleo formation J San Marcos formation s Boquilla formation a Miocene Temosacliic formation a Comondu formation l Yepomer;a formation 2 Isidro formation * Mesozoic Oligoctne(?) to Miocene, lower (?) Santa Barbara series s San Gregorio formation a Cretaceous Oligocene(f) Angela formation l Purisima Nueva formation a Buena Suerte formation l Eocene Los Lamontos formation * Tepetate formation 1 Ojinaga formation * Eocene, lower San Vicente formation l Sepultura formation J Soledad beds * Mesozoic Sonora formation l Todos Santos formation l Tlaxcala formation l Cretaceous Triste formation l Catarina formation 1 Lower Cretaceous Encina Sola quartz diorite 8 Aurora formation * La Grulla granodiorite 2 Las Vigas. formation x La Providencia granite 2 Age(?) Mesa sandstones * Rosario formation * Chorreras granite l Santa Eulalia formation a Conchos gravels 1 San Fernando formation 2 Navosaigame formation 1 San Jose" quartss diorite 2 Plomosas formation J San Telmo formation J Coahuila Lower Cretaceous Pleistocene^) Alisitps formation 2 Mayrdn formation 8 Paleozoic(?) Pliocene(f) Volcan Peak group * Santo Madero formation 2 604 GEOLOGIC NAMES OF NORTH AMERICA

Mexico Continued Mexico Continued Coahuila Continued Guanajuato Continued Cretaceous Triassic Las Cortinas formation 2 La Luz basalts * Las Esperanzas formation * Age(?) Indidura formation 1 La Luz schists l Monclova shale 1 Pinguico rhyolites * Papagayos formation1 ; Papa- Guerrero gallos formation * Upper Cretaceous Peyotes division 1 Escamela limestone 1 Rubio shale 1 Middle Jurassic Upper Cretaceous Tecqcoyunca beds 2 Caracol formation 2 Triassic(f) Difunta formation 2 Cualac quartzite 2 Parras shale J Hidalgo Lower Cretaceous Tertiary, middle or upper Barril Viejo shale 2 Las Espinas volcanics 2 Coahuila group 2 Tertiary, lower or middle Cuesta del Cura limestone a El Morro fanglomerate 2 Cupido limestone 2 Oligocene La Mula shales 2 Huatla basalt l La Pena formation 2 Cretaceous Menchacha limestone a Bofay formation 2 Padilla limestone J El Monte limestone 2 Parritas formation 2 Maltrata division J Patula arkose 2 Necoxtla formation l San Marcos arkose 2 Jalisco Taraises formation 2 Quaternary Pre-Cretaceous Estancia basalt * Boquilla slate J Pleistocene (?) Upper Jurassic Chapala beds 1 La Caja formation 2 Tertiary La Casita formation 2 Tizapan basalt * La Gloria formation 2 Mexico (Estado) Paleozoic Recent Delicias beds * Barrilaco caliche 2 Permian Noche Buena formation 2 Pichagua limestone 2 Pleistocene, upper Colina Becerra formation 2 No geologic formations with type Totolssingo formation 2 localities in the state of CoUna Miocene have been recorded in the Lexi­ Ajusco formation 2 con files. Oligocene (?) Distrito Federal Sierra Nevada formation 2 Pleistocene Upper Cretaceous(?) Armenta horizon (of Becerra for­ Jasso formation 2 mation) * Michoacan Morales caliche 2 Tertiary Tacubaya formation * Zumpimito formation 2 Pleistocene (?) Lower Cretaceous Tarango formation 2 Cochixtla beds 2 Durango Mezcal beds 2 Cretaceous Middle Cretaceous Los Muertos formation l Chile limestone J Lower Cretaceous Morelos Carbonera formation 2 Nayarit Durango group 2 No geologic formations with type Age(?) localities in the States of Morelos Copper Queen intrusion l and Nayarit have been recorded in Guardarraya intrusion 1 the Lexicon files. Guanajuato Nueyo Le6n Tertiary Miocene, lower Guanajuato conglomerate l Norma gravel * Cretaceous or Tertiary Eocene Bufa sandstone * Arenal formation * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 605

Mexico Continued Mexico Contir ued Nuevo Le6n Continued San Luis Potosi Cretaceous Eocene Tulillo beds » Tanlajas formation * Upper Cretaceous Cretaceous San Juan formation * Cardenas formation ' Lower Cretaceous Xilitla beds 2 Nuevo Le6n group 2 Upper Cretaceous Oaxaca Guadalcazar limestone 2 Pleistocene, upper San Felipe formation * Colotepec formation 2 Taninul limestone 1 Tertiary Velasco formation * Cuicatlan formation 2 Lower Cretaceous Tertiary(f) El Abra limestone * Huajuapan beds 2 Tamasopo series * Yanhuitlan beds 2 Lower Cretaceous(f) Miocene, upper Novillo beds 1 Tuxtepec formation l Tenistipa limestone ' Cretaceous Upper Jurassic Santa Cecilia limestone 2 Corona formation 2 Upper Cretaceous Pimienta beds l Petlalcingo limestone 2 Taman beds 1 Tilantongo marls 2 Upper (?) Jurassic Middle Cretaceous Santa Emilia formation 2 Magdalena series 2 San Jos6 formation 2 Lower Cretaceous Sinaloa Tlaxiaco beds 2 No geologic; formations with type Pre-Cretaceous localities in the State of Sinaloa Cacalote sandstone 2 have been recorded in the Yogana series 2 Lexicon files. Upper Jurassic Sonora Teposcolula limestone 2 Quaternary Santa Domingo flood plain de­ Tlaltepexi gypsum series 2 posits ] Lower Jurassic Tertiary Mixtepec - El Consuelo beds J Henrietta diorite porphyry],1 Pre-Mesozoic Trincheras division * Acatlan schists 2 Late Tertiary Puebla Baucari division 1 Cretaceous Mesozoic San Juan Raya formation > Lista Blanea complex or division l Upper Mesozoic or lower ^Tertiary Zapotitlan formation 1 Campana, diabase and gabbro * Middle Cretaceous Colorada quartz porphyry 2 Cipiapa limestone 2 Mesa formation 2 Lower Jurassic Cretaceous(f) Totolapa facies 2 Tarahumara formation 2 Queretaro Upper Cretaceous Upper Cretaceous Cabullona group J Soyatal formation 2 Camas sandstone * Packard shale 1 Lower Cretaceous Snake Ridge formation x Cerro Ladron facies (of El Lower Cretaceous Doctor limestone) 2 Morita formation * El Doctor limestone 2 Palmer fc»rmation * El Socavon facies (of El Doctor Potrero formation 2 limestone) 2 Triassic La Negra facies (of El Doctor Barranca division l limestone) 2 Permian San Joaquin facies (of El Doctor Tigre formation 2 limestone) 2 Upper Pennsylvanian Quintana Roo Caborca series * Monos beds * Miocene Nacozari limestone * Dos Bocas formation 2 Lower Pennsylvanian Estero Franco formation 2 Gamusa beds 2 606 GEOLOGIC NAMES OF NORTH AMERICA

Mexico Continued Mexico Continued Sonora Continued Tabasco Continued Mississippian Oligocene Represo beds * Enearnaei6n shale 2 Venada beds * Macuspana limestone 2 Devonian or Carboniferous Macuspana shale 2 Santa Rosa beds * Misopa shales * Cambrian Eocene or Oligocene Bolza quartzite l Pichucalco beds * Esperanza limestone * Eocene, middle and upper Upper Cambrian(f) China! limestone 2 Puertecitos limestone * Chinal shales * Middle Cambrian Puente de Piedra conglomerate * Arrojos formation * Upper Cretaceous Tren formation * Ocozocualta (formation) a Lower Cambrian Paso Mono limestone 3 Buelna formation * Lower Cretaceous Cerro Prieto formation * Chival (formation) * Proveedora formation * Guayal limestone 2 Puerto Blaneo formation * San Ricardo (formation) 2 Precambrian or Lower Paleozoic Tamaulipas Atil sandstone * Tertiary, upper Precambrian Cerro Topila beds J Altar schists * Quintero limestone 2 Capote quartzite * Pliocene and Pleistocene or Recent Jajoba formation * Reynosa formation J and lime­ Age(f) stone * Bella Union granite * Miocene Caliche Mountain rhyolite l Pamoranes beds (in San Fer­ Cananea granite l nando formation) 2 Capote limestone l Miocene, lower Caridad conglomerate * Guajalote formation * Caridad quartz monzonite * Oligocene Cuitaca granodiorite l Palo Alto formation 2 Durazno formation J Pinole formation J Elenita syenite porphyry l Saladito formation 2 Elisa quartz monzonite por­ San Fernando formation * phyry » San Rafael formation x El Torre syenite 1 Encinas quartz porphyry * Eocene Golden Bar andesite rocks * Los Esteros formation 1 Huacalote rhyolite 1 Eocene, upper La Brisca formation * Los Guerros sandstone member Magallanes rhyolite * (of Fayette formation) l Mariquita diabase 1 Roma sandstone member (of Nacozari granite * Fayette formafcion) 1 Pilares monzonite * Sanchez sandstone member (of San Pedro andesite * Fayette formation) * Santo Domingo rhyolite l Villa Nueva sandstone member Saracachi formation * (of Fayette formation) l Tinaja granite porphyry * Eocene, middle Tabasco Alamo sandstone member (of Pleistocene Yegua formation) 1 Tierra Colorada formation * Alberca sandstone member (of Miocene Yegua formation) * Amate (Lower and Upper) for­ Mier sandstone member (of mation * Yegua formation) * Encajonado formation a Once Lomas sandstone member Gonzalez sands * (of Carrizo formation) * Miocene, upper Saucito sandstone member (of Belem formation * Cook Mountain formation) 1 Tres Puentes formation * Eocene, lower Miocene, middle Chalma shale (in Chicontepec Zargazal formation 2 formation) 2 Miocene, lower Jaco sandstone (in Chicontepec Prudencia sandstone * formation) 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 607

Mexico Continued Mexico C ontinued Tamaulipas Continued Vera Cruz Continued Eocene, lower Continued Eocene Puerto Colorado sandstone mem­ Chapatan formation 2 ber (of Indio formation) l Chicontepec formation 1 Upper Cretaceous Guayabal formation l Solis limestone J Idolo beds l (subsurface) Victoria limestone l Tantoyuca formation. l Middle Cretaceous Tempoal shale * Otates horizon (of Tamaulipas Eocene, upper limestone) 2 Carmen (formation) f San Tamaulipas formation J (sub­ Chapappte formation * surface) Eocene, middle and upper Tamaulipas limestone J Nanchital conglomerate series * Jurassic Eocene, lower Huizachal formation J Aragon formation l Oliyido formation 2 Nanchital shales J Permian Uzpanapa conglomerate 8 Guacamaya beds J Cretaceous Mississippian Limon beds * Peregrina formation * Orizaba limestone * Tlaxcala Tamabra * (formation) No geologic formations with type Tamesi formation l localities in the State of Tlax­ Upper Cretaceous cala have been recorded in the Agua Nueva formation a Lexicon files. Barranc6n beds J Vera Cruz Mendez formation * Tertiary Panuco gray limestone x (subsur­ Ozuluama series * face) Pliocene Penuela limestone J Acalapa conglomerate 2 Middle Cretaceous Miocene Sierra Madre limestone * Coatzacoalcos formation l Tamiahua faeies J Papantla formation J Lower Cretaceous Punt a Gorda (formation) a Comal series 2 Teapa (formation) 2 Jurassic Tuxpan formation l San Bartolo formation 2 Veronica (formation) 2 Upper Jurassic to Lower Cretaceous Miocene, upper Chinameca limestone * Cedral formation J Lower Jurassic Miocene, middle Divisadero faeies 2 Agueguexquite formation 1 Huayacocotla formation a Pajaritos (formation) J Yucatan Paraje Solo formation * Tertiary Santa Rosa beds x Sierrita limestone J Miocene, lower Oligocene or Miocene Concepcion (Lower and Upper) Icaich6 formation 2 series 2 Zacatecas Encanto series J Filisola series 3 Tertiary Oligocene Mazapil conglomerate * Alazan shale 1 Middle Cretaceous or older C6atzintla formation 8 Proafio group 2 Deposito series 3 Lower Cretaceous Escolin series J Nazareno bed (in Cupido lime­ La Laja series 3 stone) 2 Meson beds 1 Nieva shale J Palma Real 1 (formation) Upper Jurassic Temapache limestone l Texistepec (formation) 8 Zuloaga limestone s Oligocene, lower Central America Huasteca formation J British Honduras Eocene to Oligocene Miocene Horcones formation 2 Rio Dulce limestone l 608 GEOLOGIC NAMES OF NORTH AMERICA

Central America Continued Central America Continued Costa Rica Honduras Continued Pliocene Cretaceous(?) Limon clays * Aquacatal porphyritic andesite 8 Penitas formation 2 Reforma hypersthene andesite a Suretka conglomerate l Upper Cretaceous or lower Tertiary Miocene Valle de Angeles formation 2 Bonilla formation l Upper Cretaceous Nicoyan series * Esquias formation l Sheroli formation l Upper Triassic Miocene, lower El Plan formation * Uscari shale 1 Tegucigalpa * (formation) Oligocene or lower Miocene Pre-Upper Triassic Amoura shale 2 Peten formation * Oligocene Nicaragua Guallava sandstone ' Quaternary Manzanilla beds 1 Saclin formation * Eocene(?) Soulala formation l Cartago formation 1 Tertiary Puerto Carballo arenaceous lime­ Brito formation * stone series J Oligocene(?) Cretaceous or Lower Tertiary Machuca formation * Desamparados formation 1 Panamd and the Canal Zone San Miguel limestone l Pleistocene and Recent Age(f) Atlantic muck J Aguacate series l Chargres alluvium 2 Colorado limestone J Pacific muck 2 Rio Seco diabase * Pleistocene Sabana Grande siliceous lime­ Aguadulce formation * stone J Armuelles formation 2 El Salvador Mariato formation l Pliorene(?) Mount Hope formation l Rio Torola limestone * San Carlos formation 1 Guatemala P re-Pleistocene Tertiary Azuero formation 1 Sepur beds J Pliocene Miocene(?) Caribbean limestone ' Santo Toribio beds * Charcp Azul formation 2 Mesozoic Piliguilla conglomerate 2 Ixcoy limestone 2 Pliocene, lower Cretaceous Chagres sandstone l Coban limestone 2 Toro limestone ' member (of Upper Cretaceous (f), Eocene(f), or Chagres sandstone) Oligocene(?) Pre-Pliocene Pet6n marls and limestone 2 Ancon rhyolite 2 Lower Cretaceous Chiva Chiva andesite 2 Metapan formation l Point Farfan diorite 2 Honduras Miocene, upper Pliocene(?) Chucunaque formation 2 Escobales granodiorite 2 Limones shale 2 Guacamayas dacite tuffs and Miocene, upper, or Pliocene, lower flows J Burica sandstone 2 Jutiapa rhyolitic tuffs and sedi­ Miocene, middle and upper ments 2 Gatun formation 1 Ilanco Quemado dacite z Miocene, middle Pliocene, lower Cativa marl (in Gatun forma­ Gracias formation 2 tion) 2 Miocene Pucro sandstone J Toledo series 2 Tuira formation 2 Cretaceous Miocene, middle(?) Cantarranas formation 2 Sabanitas formation J Colonia andesitic tuffs and brec­ Miocene, lower . cias J Alhajuela sandstone member (of Crucero tuffaceous dacite flows 2 Caimito formation) 2 Plancitos formation 2 Bruja Island dolerite 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 609

Central America Continued Central America Continued Panamd and the Canal Zone Con. Panamd and the Canal Zone Con. Miocene, lower Continued Cretaceous and Eocene Cerro Gigante basalt 2 Mata Chin formation a Chillibrillo limestone member (of Age(?) Caimito formation) 2 The names Bijuco, Guaxaro, and Chorrera basalt 2 Rio Santa Maria are errone­ Cucuracha formation * ously listed in lithic combina­ 1 tions with age unknown in Emperador limestone * member part A of this bulletin, owing (of Culebra formation) to mistranslation. La Boca marine member (of Canazas formation J Panamd formation) 2 Montijo conglomerate l Miraflores basalt 2 Obispo breccia * Panama formation * Obispo limestone l Pedro Miguel agglomerate mem­ Parita formation * ber (of Panamd formation) 2 Santiago formation l Sosa Hill basalt 2 Torio limestone l OUgocene or Miocene Veraguas crystalline series 1 Vamos Vamos beds l Wemir agglomerate 2 OUgocene and Miocene Greenland Caimito formation l Detailed information on the OUgocene geologic formations of Green­ Gamboa formation 2 land can be found in the Mona shale * Lexique Stratigraphique Inter­ Monkey Hill formation * national, v. 1, , fascicule Pefia Blanca marls ' 1 a, Greenland. Sensori agglomerate and lime­ Pleistocene stone l Baffin till» Tigre limestone l Tertiary (see also Cretaceous- Watsi Shale 1 Tertiary) Qligocene(t) Cape Edward Holm complex 2 Bas Obispo formation 1 Dreibuchten zone 8 Oligocene, upper, or Miocene, lower Kangerdlugssuaq complex 2 Rio Duque shales 2 Kap Simpson complex 2 Oligocene, upper, and Miocene, lower Skaergaard complex 2 Aquaqua formation 2 Tertiary(?) Carba facies (of Caimito forma­ Cape Parry alkaline complex 2 tion) 2 Tertiary, upper, to Quaternary, Tapaliza shales 2 lower Oligocene, upper Skeldal conglomerate 2 Arusa formation 2 Miocene Las Cascadas agglomerate (as Sinnifik strata 2 Las Cascades agglomerate ') Atanikerdluk beds 2 Quebrancha limestone member Ipsorisok strata 2 (of Caimito formation) 2 Eocene Oligocene, lower-upper Cape Dalton formation 2 Bohio formation (as conglomer­ Sabine Island formation 2 ate ») Eocene(f) Oligocene, lower Lilloise complex 2 Clarita limestone 2 Prinsen af Wales Bjaerge lavas 2 Eocene Cretaceous- Tertiary Bucard formation 2 Nugsuak formation 2 Mindi Hill beds 2 Upper Cretaceous Eocene, upper Albrechtsbugt facies 2 fBohio limestone ' Atane beds 2; see also Atane beds 1 Casa Larga marls 2 Kap Gustav Holm series 2 David formation 2 Knudshoved beds 2 Tranquilla shale 2 Patoot beds 2; see also Patoot Eocene, middle and upper beds l Gatuncillo formation 2 Upper Cretaceous(?) Pre-Eocene Kangerdlugsuak series 2 Barbaeoas formation 2 Lower Cretaceous Miraflores pumice 2 Cape Hamburg formation 2 San Pablo phase (of Barbacoas Falskebugt beds 2 formation) 2 Hartz Fjaeld formation 2 610 GEOLOGIC NAMES OF NORTH AMERICA Greenland Continued Greenland Continued Lower Cretaceous Continued Lower Carboniferous (f) Home Foreland beds 2 Foldvik Creek formation J Kome beds; 2 see also Kome beds 1 Middle Pennsylvanian Kuhnpas facies 2 Blyklippen series 2 Lindemansbugt facies 2 Devonian or younger Niesen beds 2 Randb01 conglomerate * R0dryggen beds a Devonian Young Sound facies a Cape Graah formation 2 Jurassic Kap Bull series 2 Cape Leslie sandstone J Kap Franklin conglomerate 2 Chatton Bay sandstone 2 Kap Kolthoff series 2 Upper Jurassic Mont Celsius series 2 Cape Maurer formation 2 Devonian(f) Chareotbucht sandstone 2 Hurry Inlet granite 2 Fossil Mountain formation 2 Igaliko sandstone J K10ft I formation J Ilimausak complex 2 Koch Fjaeld formation 2 Ilimausak porphyries J Kuhn beds 2 Kakarsuak porphyrite 2 Rigi series 2 Tasek porphyrite 2 Traekpas formation 2 Upper Devonian Vardekl0ft formation 2 Mount Hogbom series 2 Lower Jurassic Middle Devonian Neills Cliff formation J Kap Franklin-Vildtal granite 2 Triassic (see also Permo-Triassic) Margrethetal series 2 Fleming Inlet series * series 2 Upper Triassic Ravnefjeld formation 2 Cape Biot formation 3 Rodetal conglomerate (in Mag- Cape Stewart formation s rethetal series) 2 Lower Triassic (see Permian or Vildtal series 2 Lower Triassic) Pre- Devonian Eotriassic Cape Wardlaw complex 2 Wordie Creek formation J Silurian (see also Ordovician and Paleozoic Silurian) Cape Fletcher series J Polaris Harbour formation 2 ; see Lower Paleozoic also Polaris Harbour forma­ Angmagsalik granite 2 tion l Cape Greg gneisses 2 Silurian(f) Emilia group 2 Profilfieldet shales 3 Franz Josef beds * Middle Silurian Grejsdalen granite J Cape Schuchert formation 2 Hagar group 2 Cape Tyson formation 2 Hurry Inlet gneisses 2 Dr0mmebjerg limestone 2 Isfjord zone J Offley Island formation2; see also- Milneland granite J Offley Island formation 1 Store Fjord gneisses J Ordovician and Silurian Store Fjord granite 2 Centrum limestone 2 Svejstrips injection complex J Ordovician Sylya-Maria group 2 Narwhale Sound formation * Permian or Lower Triassic Middle or Upper Ordovician Cape Brown and Hurry Inlet B0rglum River limestone 2 series J Cape 2 Per mo- Triassic Middle and Upper Ordovician Mount Nordenskiold formation 2 Cape Calhoun series 2 Per mo- Triassic (?) Middle Ordovician Klitdal formation 2 Cape Webster formation 2 Permian Gonioceras Bay formation 2 Cape Stosh formation 8 Troedsson Cliff formation 2 ; see Depot Island formation * also Troedson Cliff formation l Lower Permian Wright Bay formation 2 Domkirken series 2 Middle Ordovician(f) Upper Carboniferous Painted formation * Halle Mountains formation * Lower Ordovician Mallemuk Mountain formation J Cape Clay formation 2 Lower Carboniferous Cass Fjord formation 2 Mount Pictet formation 2 Danmarks Fjord dolomite * INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 611

Greenland Continued Greenland Continued Lower Ordovidan Continued Precambrian Continued Eskimo Hut formation 2 Egedesminde gneiss complex 2 Nunatami formation 2; see also Eleonore Bay formation 2 Nunatami formation * Eleonores S0 series 2 Nygaard Bay limestone 2 Eremitdal series (in Eleonore Poulsen Cliflf shale 2 Bay formation) 2 Wandel Valley limestone 2 Etah formation 2 Cambrian or Ordovidan Finnefjeld complex 2 Kap Holbaek sandstone 2 Gardar formation 2 Cambro-Ordovidan (?) Greenlandian 2 Hurry Inlet formation 2 Gregory series 2 Cambrian (see Precambrian or Cam­ Ikertoq gneiss complex 2 brian- and Precambrian to Isortoq gneiss complex 2 Cambrian) Julianehaab granite 2 Cape Frederick VII formation 2 Kangamiut diabase 2 Dolomite Point formation 2 Kangamiut gneiss complex 2 Hvolithus Creek formation 2 Ketilidian period 2 Cambrian(f) Kungnat granite 2 Br0nland Fjord dolomite 2 Maalebjerg series (in Eleonore Upper Cambrian(f) Bay formation) 2 Pemmican River formation 2; M0rkebjerg formation a see also Pemmican River for­ Mystery quartzite series 2 mation > Narssarssuk formation 2 Middle Cambrian Nunarsuit granite 2 Blomsterbaek limestone member Rivieradal sandstone 2 (of Cape Wood formation) 2 Sermilik group 2 Cape Russell member (of Cape Stenorkenen phyllites 2 Wood formation) 2 Sukkertoppen gneiss or granite a Cape Wood formation 2 Sydpr0ven granite 2 Ymer formation 2 Sydvejdal marbles a Middle Cambrian(?) Taagefjeldene graywackes 2 Blomsterbukta quartzite and Thule formation 2; see also shale 2 Thule formation * Hidden Valley formation 2 Tvege banded psammitic/pelitic Noa Lake quartzite 2 group 2 Lower Cambrian Tyroler series 2 Bastion formation 2 Tyrolerdal banded psammitic/ Cape Kent formation 2 pelitic group 2 Ella Island formation 2 Tyrolerdal group 2 Marshall Bay formation 2 Ulvebjerg sandstones and til- Petermann series 2 ; see also lites 2 Petermann series * Westendspids pelitic group 2 Wulff River formation 2 Wolstenholme quartzite 2 Lower Cambrian(f) Precambrian (?) Spiral Creek formation 2; see also Marmovigen conglomerate 2 Spiral Creek formation l Norsemandal sandstone 2 Precambrian or Cambrian Age(f) Cape Ingersoll dolomite 2 Cape Leiper dolomite 2 Bj0rne 0 conglomerate 2 Cape Oswald formation 2 Campanuladal sandstones and Rensselaer sandstone 2 limestones 2 Tillite Canyon formation 2 ; see Fyns S0 dolomite 2 also Tillite Canyon formation 1 Milne Land quartzite * Precambrian to Cambrian R0de 0 conglomerate 2 Tfimmer Bay group 2 Bermuda Precambrian Pleistocene Agpat formation 2 Belmont limestone * Alpefjord series (of Eleonore Devonshire formation l Bay formation) 2 Harrington soil 2 Arsuk group 2 McGalls soil s Canyon series (in Eleonore Bay Pembroke eolianite 2 formation) 2 St. Georges soil 2 Cape Rawson beds 2 Shore Hill soil 2 Danish Village formation 2 Signal Hill soil 2 Dombjerg paraschists 2 Somerset eolianite 8 504835 59 14 612 GEOLOGIC NAMES OF NORTH AMERICA

Bermuda Continued West Indies Continued Pleistocene Continued Barbados, British West Indies Con. Southampton eolianite * Eocene, lower and middle Warwick eolianite * Scotland beds l Pliocene Eocene, lower Walsingham formation * Morgan Lewis beds (in Scotland Age(?) formation) 2 Paget formation l St. Andrews beds 2 West Indies Walkers beds (in Scotland for­ mation) 2 Small islands of the West Indies from Barbuda, British West Indies which no geologic formations have Pleistocene been named are not listed here. Barbuda limestone 2 Detailed information on these and Bonaire, Netherlands West Indies the larger islands except Cuba can Pleistocene be found in the Lexique Strati- Seroe Largo limestone 2 graphique International, v. 5, Amer- Eocene, upper ique Latine, fascicule 2 b, Antilles. Seroe Montague limestone J Anguilla, British West Indies Cretaceous or Tertiary Miocene, lower Rincon formation 2 Anguilla formation * Soebi Blanco conglomerate 2 Antigua, British West Indies Cretaceous Pleistocene Washikemba formation 2 Friars Hill gravel and marls l Cayman Islands, British West Indies Oligocene Pleistocene or Recent Cassada-Garden gravels * Bluff limestone l Central Plain tuff formation * Ironshore limestone l Hodges Hill sandstone * Cuba Seaforth limestone l Quaternary Oligocene, upper Coastal limestone * Antigua formation * Recent Age(f) Surgidero formation 8 Friars Hill series * Pleistocene Aruba, Netherlands West Indies Jaimanitas formation 2 Upper Cretaceous Zapata formation l Aruba formation 2 Pleistocene(f) Bahama Islands Las Puercas marl * No geologic formations in the Ba­ Pliocene hama Islands have received Matanzas series l names. Miocene Barbados, British West Indies La Cruz marl 1 Quaternary Manzanillo formation 2 Bath-Reef series l Punta Maisi limestone * Tertiary Miocene, upper Ragged Point series * El Abra formation * Oligocene, upper Miocene, middle Bissex Hill marl 2 Canfmar formation * Oligocene, lower Miocene, lower Codrington College marl * Limonar formation 2 Eocene Oligocene or Miocene Mount Hillaby beds 2 Cojimar formation l Mount Poyer sandstone (in Scot­ Guantanamo shale * land beds) 2 Guines limestone l Eocene, upper Maquay formation * Bath beds (in Oceanic forma­ Yumuri limestone l tion) * Oligocene and Miocene Joes River beds 2 Nipe series 2 Eocene, upper, to Oligocene Paso Real formation 2 Oceanic formation 2 Oligocene Adelina marl 2 Eocene, middle Farallon Grande breccia 1 Chalky Mount group l Oligocene, upper Mount All beds (in Scotland Tarara formation 2 formation) 2 Oligocene, middle Murphys beds (in"Scotland for­ Col6n formation 2 mation) 2 Jaruco formation 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 613

West Indies Continued West Indies Continued Cuba Continued Cuba Continued Oligocene, lower Upper Jurassic Alava formation a Jagua formation 2 Morcate formation 2 Quemado formation 2 Tinguaro marl 2 Upper Jurassic(f) Eocene and Oligocene Gerona marble l Guato formation 2 Pre-Jurassic (?) Eocene Pinar schist l Bejucal formation * Age(?) Cobre series 2 Daguilla diorite schist l Cubitas limestones 2 Mal Pais gravel' Guaso limestone * Santa Fe schist l Principe formation l Trinidad schists 2 Eocene, upper Curasao, Netherlands West Indies Consuelo formation 2 Recent Jabaco formation 2 Asiento formation 2 Jicotea member (of Jabaco for­ Boca Santo Preto conglomerate mation) 2 Westpuntbaai conglomerate 3 San Luis formation l Pleistocene Eocene, middle Blaubaai conglomerate 2 Charco Redondo limestone 2 Ronde Klip conglomerate 2 Elmira formation 2 Seroe Domi beds 2 Loma Candela formation x Eocene, upper Pefi6n formation 2 Mainsjie formation 2 Eocene, lower Seroe di Cueba series 2 Capdevila formation 2 Upper Cretaceous and Paleocene Toledo member (of Universidad Midden-Curae.ao beds 2 formation) 8 Upper Cretaceous Universidad formation * Seroe Teintje limestone * Paleocene Cretaceou$(f) Remedios limestone 2 Knip beds 2 Cretaceous > Dominica/'British West Indies Artemisio limestone * Pleistocene Camajuani formation l Grand Savanna gravel series Cayetano formation l Morne Daniel gravel series a El Cano formation l Havana shales * Roseau tuffs 2 Lucero beds * Dominican Republic Luyano marls * Pliocene Madruga chalk l Gato formation 1 Tuff series a Jimanf formation 2 Cretaceous(?) Las Matas gravels l Vinent formation l Miocene Upper Cretaceous Nivaje shale 2 Camajan breccias (in Habana Miocene, upper formation) 2 Caimito formation a Habana formation 1 Cerros de Sal formation * Jaronu limestone 2 Las formation J La F6 limestones 2 Via formation 2 Loma Yucatan limestone 2 Miocene, middle Provincial limestones (in Tuff Arroyo Seco formation 2 formation) 2 Bulla conglomerate * Tinajita formation 2 Cercado formation l Yucatan limestones 2 Gurabo formation l Lower Cretaceous Mao clay l Aptychi limestone or formation a Mao Adentro limestone l Jurassic Miocene, lower and middle San Cayetano formation 1 Yaque group J Jurassic(?) Miocene, lower Vinales limestone * Angostura formation 2 Upper Jurassic and Lower Cre­ Arroyo Blanco formation taceous Baitoa formation ' San Andres formation 2 Cevicos limestone 1 614 GEOLOGIC NAMES OF NORTH AMERICA

West Indies Continued West Indies Continued Dominican Republic Continued Haiti Continued Miocene, lower Continued Eocene, middle Higuerito member (of Arroyo Perodin formation (Jaques But­ Blanco formation) 2 ter lin, 1954, Inst. Franc, ais Oligocene, upper d'Haiti Mem. 1, p. 433) Bao group 2 Paleocene Florentine formation ' Marigot formation 2 Lemba formation 2 Upper Cretaceous Quita Coraza formation 2 Macaya formation * Tabera formation l Trois-Rivieres formation * Trinchera formation 2 Jamaica Oligocene, middle Pleistocene Las conglomerates a Barbican formation * Oligocene, lower and middle Bogue Island formation l Sombrerito formation 2 Falmouth formation l Eocene Hopewell formation 1 Ocoa formation * Kingston formation * Eocene, upper Liguanea formation 2 Neiba formation 2 Montego formation l Eocene, middle Tertiary Hidalgos formation 2 Cobre» (beds) Moneague l (beds) Eocene, lower Montpelier * (beds) Abuillot formation 2 Pliocene or Pleistocene The Grenadines, British West Indies Porus formation 1 Miocene, lower Pliocene Carriacou limestone 2 Layton formation 2 Grand Bay beds 2 Manchioneal formation * Guadeloupe, French West Indies Miocene and Pliocene Pleistocene Low Layton pillow lavas a Usine limestone 2 Miocene or younger Miocene Hayes conglomerate 2 Abymes tuffs 2 Miocene Gensole tuffs 2 Bengal limestone 2 Grande Terre limestone 2 Miocene, upper Age(f) August Town series 2 Lafonde gravel and marl * Buff Bay beds » Petit Bourg series * Round Hill series 2 Haiti Miocene, middle or upper Pliocene Hope Gate limestone or series a Hinche formation * Riviere Gauche formation 2 Miocene, middle Miocene Bowden formation l Morne Delmas formation 2 Miocene, lower (see also Eocene, Miocene, middle middle, to Miocene, lower) Las Cahobas formation l May Pen beds * Plaisance limestone * St. Thomas-in-the-Vale marls 2 Port-au-Prince beds 2 Oligocene, upper, and Miocene, Miocene, lower and middle lower Artibonite group * Newport limestone member (of Miocene, lower White Limestone formation) 2 Madame Joie formation l Oligocene (see also Eocene, middle, Thomonde beds * to Miocene, lower) Maissade tongue (of Thomonde formation) l Cockpit limestone group * Oligocene and Miocene Oligocene, upper Riviere Grise formation a Walderston limestone member Oligocene, middle (of White Limestone forma­ Cr£te formation 2 tion) 2 Oligocene, lower Eocene Arc formation 2 Ben Bow limestone * Bassin Zim formation * Cambridge formation 1 Eocene, upper Catadupa * (formation) Ennery formation 2 Port Maria conglomerate 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 615

West Indies Continued West Indies Continued Jamaica Continued Puerto Rico Eocene, upper Quaternary Chapelton formation 1 Cabo Rojo stage l Somerset limestone member (of Desecheo stage l White Limestone formation) 8 Isabella stage * Eocene, upper (?) Recent New Castle porphyry * Santa Isabel series 1 Eocene, middle or upper Pleistocene White Limestone basement 2 San Juan formation * Eocene, middle, to Miocene, lower Tertiary White Limestone formation 2 Arecibo formation * Eocene, middle Collazo shale 1 Troy limestone member (of Gu&nica coral reefs 1 White Limestone formation) 2 Lares shale ' Yellow Limestone formation 2 Mayagiiez shales J Eocene, lower Miocene, upper, or Pliocene, lower Cinchona limestone (in Mt. Guanajibo formation 2 (subsur­ Hybla beds) 2 face) Good Hope limestone * Miocene Halberstadt limestone * Pepino formation * Halberstadt volcanic group a Puerto Ferro limestone 1 Mount Hybla group 2 Richmond formation * Quebradillas limestone 1 Wagwater group 2 Miocene, lower Woodford limestone member (of Aymamon limestone * Wagwater group)* Aguadilla limestone a Cretaceous Aguada formation * Ballard l (formation) Oligocene or Miocene Frankenfield ' (formation) Cibao formation (as limestone *) Jerusalem l (formation) Los Puertos limestone 1 Logie Green l (formation) Oligocene Minho beds l Guajataca member (of Cibao Yallahs formation * marl) 2 Upper Cretaceous Lares limestone 1 Barrettia limestone * Rio Guatemala group 2 Blue Mountain series l San Sebastian formation (as Diozoptyxis shales 2 shale >) Inoceramus series 2 Oligocene, upper, and Miocene, Ostrea limestone 2 lower Providence shales * Ponce limestone > Purple Conglomerate group * Oligocene, middle Serge Island marble l Juana Diaz formation (as shales Titanosarcolites limestone * and marls l) Veniella shale 2 Oligocene, lower Pre-late Cretaceous Cafias Arriba formation a Arntully serpentine 2 Eocene Coamo Springs limestone series J Pre-Mesozoic Rio Descalabrados series 1 Westphalia schists 2 Rio Jueyes series * Paleocene, upper, or Eocene, lower Port Royal clay shales 2 Fajardo formation (as shales l) Martinique, French West Indies Figuera formation * Miocene Cretaceous Vauclin tuffs * Aibonito conglomerate * Miocene, middle Coamo tuff 1 Bassignac tuffs * Ensenada shale l Oligocene Guayabal limestone * Bourg du Marin limestone 2 Guayama series l Oligocene, upper Guzman formation * Macabou limestone a Juan Ascencio member (of Fa­ Morne Vent limestone a jardo shale) l Oligocene, lower Luquillo formation * Fond Moustique tuffs * Pefiuelas shale 1 616 GEOLOGIC NAMES OF NORTH AMERICA West Indies Continued West Indies Continued Puerto Rica Continued St. Martin, French and Netherlands- Cretaceous Continued West Indies Rio conglomerate * Tertiary, lower Rio Blanco series 1 Simson Bay formation 2 Rio Culebrinas series l Miocene Rio Yauco series 1 Low Lands formation 2 San Diego formation * Oligocene, upper San German limestone l Tintamarre formation 2 Sierra de Cayey tuffs J Upper Cretaceous (f) Cretaceous(f) Pointe Blanche formation 3 Aguas Buenas limestone 1 Miocene, upper, and Pliocene Corozal limestone 1 Rockly Bay formation 2 Juan Asencio chert beds J Cretaceous (?) Muda limestone l Bacolet formation 2 Unibon shale 1 Hawks Bill formation 2 Upper Cretaceous Goldsborough formation * Atalaya limestone 2 Main Ridge formation 2 Cape San Juan limestone 2 Merchiston formation 2 Cialitos limestone 2 Mount Dillon formation 2 Frailes formation (see p. 622.) North Coast schist group 3 Guilarte limestone 8 Parlatuvier formation 2 La Muda limestone 1 member (of Tobago volcanic group 2 Frailes formation) Trinidad, British West Indies Pleistocene Las Marias limestone 2 Godineau beds 2 Orcovis limestone 2 Melajo clay 2 Trujillo Alto limestone (as Tru- Oropouche formation 2 jillo formation *) Pierreville clay 2 Upper Cretaceous (?) Siparia beds 2 GuaynSbo formation 1 Pleistocene (f) Hato Puerco tuffs l Llanos formation * Lower Cretaceous Tertiary Rio de la Plata series 1 Caroni series l Lower Cretaceous (f) Morne 1'Enfer formation * Tamana series l Barranquitas shaly limestone 1 Williamsville clay * Comerio beds 1 Pliocene and Pleistocene Cedros beds 2 Coqui limestone l Pliocene Collores limestone l Camparo formation 2 Juncor gabbro l Matura formation 1 Patillas quartz monzonite 1 Palmiste clays 2 San Lorenzo quartz diorite 1 Miocene and Pliocene Yabucoa granite * Talparo formation 2 St. Bartholomew, French West Indies Miocene Eocene, middle Concord member (of Brasso for­ Caves limestone member (of mation) 2 Saint Bartholomew formation) 2 Cruse oil zone * (subsurface) Flamand limestone member (of Forest clay and sands * (subsur­ Saint Bartholomew formation) 2 face) Lezard limestone member (of Freemans Bay limestone 2 Saint Bartholomew formation; 2 Guaracara limestone l Mongeant limestone member (of Lengua beds s Saint Bartholomew formation) 2 Machapoorie formation l St. Bartholomew limestone 1 Montserrat sand member (of Upper Brasso formation) 8 St. Eustatius, Netherlands West Indies Moruga series x Pleistocene, upper(f) Mount Pleasant greensand hori­ White Wall formation 2 zon (of Manzanilla formation) * St. Kitts, British West Indies Naparima marl 1 Pleistocene, lower Palo Seco formation 2 Brimstone Hill limestone 2 Pointe Noir beds 2 Brimstone Hill tuffs 2 Poonah sands l Princes Town marl l St. Kitts gravels Stollmeyer oil zone |( (stri^sttrface) INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 617

West Indies Continued West Indies Continued Trinidad, British West Indies Con. Trinidad, British West Indies Con. Miocene (?) Eocene Manzanilla formation ' Bon Accord conglomerate 2 Miocene, upper Fitt Trace marl 3 Erin Point beds (in Moruga for­ Nariva series 1 mation) 2 Soldado Rock formation * Goudron sands (in Moruga for­ Eocene(?) mation) 2 Benitie group 2 La Brea formation 2 Galeota group 2 Los Atajos member (of Brasso Lagoon NavSte group 2 formation) 2 Lagoon Palmiste group 2 Mamural clay (in Springvale for­ Eocene, upper mation) 2 Boca de Serpiente formation 2 Springvale formation 2 Hospital Hill formation 2 Telemaque sand (in Springvale Morne Roche beds 2 formation) 2 Mount Moriah formation 1 Miocene, middle (see also Oligocene, Plaisance conglomerate 2 ' middle to Miocene, middle) San Fernando formation)]1 Brasso clay (in Manzanilla for­ Soldado formation 2 mation) 2 Ulen Quarry beds 2 Brasso conglomerate member (of Vista Bella member (of Mount. Manzanilla formation) 2 Moriah group) 2 Santa Lucia clay 2 Eocene, middle Miocene, lower or middle Pelican Rock marls 2 Navarro River member (of Bras­ so formation) 2 Eocene, lower or middle Tunnel Hill member (of Brasso Friendship Quarry marl (in formation) 2 Navet formation) 2 Miocene, lower and middle Mount Harris beds (in Pointe-a- Biche limestone 2 Pierre formation) 2 Miocene, lower Penitence Hill marl (in Navet Brigand Hill limestone 2 formation) 2 Herrera sandstone 2 Pierre Point beds (in Pointe-a- Rio Claro boulder bed 2 Pierre formation) 2 Oligocene and Miocene Eocene, lower and middle St. Croix formation l Nariva River marl 2 Navet formation 2 Oligocene Pefial Quarry horizon (in Palo- Alley Creek beds 2 Seco formation) 2 Bontour Point 1 (formation) Eocene, lower Cacatro member (of Cipero for­ Dunmore Hill marl member (of mation) 2 Navet formation) 2 Cipero marl formation 2 Ramdat marl (in Navet forma­ Flat Rock tongue (of San Fer­ tion) 2 nando formation) 2 Serpent formation 2 Godineau River marls 2 Paleocene Kapur limestone 2 Chaudiere formation 2 Karamat formation 2 Cunapo River argiline 2 Mejias limestone 2 Ganteaume conglomerate 2 Morne Diablo beds 2 Maroc formation * Paradise member (of Cipero for­ St. Joseph boulder bed 2 mation) 2 Soldado formation 2 Quinam limestone) 2 Tarouba shale l Retrench marls 2 Paleocene, lower Tabaquite series 2 Lizard Springs formation 2 Cretaceous or Tertiary Oligocene(f) Parian group * Ben Lommond formation * Cretaceous Oligocene, upper La Carriere shale* Trinidad Point calcareous clay 2 Point a Pierre grits * Oligocene, middle, to Miocene, middle Upper Cretaceous Brasso formation 2 Bontour formation 2 Oligocene, middle to upper Chert Hill formation * Esmeralda member (of Brasso Cunapo-Southern horizon (ia formation) 2 Turure formation) 2 618 GEOLOGIC NAMES OF NORTH AMERICA

West Indies Continued Pacific Islands Continued Trinidad, British West Indies Con. Caroline Islands (Angaur) Upper Cretaceous Continued Pleistocene and Recent Gautier formation 2 Angaur (Older and Younger) Guayaguayare beds 2 (subsur­ limestone 2 face) Caroline Islands (Babelthaup) Hobsons clay 2 Pleistocene Lantern marl (in Chaudiere Palau limestone 8 shale) 2 Pliocene Naparima Hill formation 2 Airai lignite bearing beds 2 Railway Cut marl (in Chaudiere Oligocene shale) 2 Arumonogui (Almongui) agglom­ San Fernando argiline 2 erate 2 Stack Rock limestone 2 Eocene Toco Bay beds 2 Aimiriiki (Aimiliiki) agglomer­ Turure formation * ate 2 Lower Cretaceous Babelthaup agglomerate 2 Bon Accord formation a Kameset (Gamusetsu) agglom­ Cuche formation 2 erate 2 Cuche River beds 2 Ngardok (Galdog) beds * Cumana formation 2 Caroline Islands (Eastern) Galera formation 2 Miocene Galera Grit member (of Galera East Caroline beds 2 formation) 2 Caroline Islands (Fais) Grande Riviere formation 2 Pleistocene Grande Riviere Road limestone 2 Caroline limestone 2 Maridale formation 2 Fais limestone 2 Plum Road formation 2 Caroline Islands (Garim, island off San Souci volcanic formation 2 Yap) Toco formation 2 Pleistocene Zagaya limestone member (of Garim limestone 2 Toco formation) 2 Caroline Islands (Kusaie) Lower Cretaceous(f) Pliocene Caribbean group l lisa beds 2 Pre-Cretaceous(f) Miocene Laventille limestone l Malam (Maremu) beds 2 Jurassic Caroline Islands (Map) Cuare limestone 2 Miocene Maracas beds 2 Map formation 2 Maraval beds 2 Caroline Islands (Peleliu) Picton limestone member (of Recent Laventille formation) 2 Ngarekeukl (Galkyoku) lime­ Rio Seco formation 2 stone 2 Upper Jurassic Pleistocene Hollis Reservoir formation 2 Peleliu limestone 2 Quare1 limestone (in Hollis Reser­ Caroline Islands (Ponape) voir formation) 2 Miocene Jurassic or older Metalanim (Matalanim) beds 2 Dragon formation (type locality Caroline Islands (Truk) in Venezuela) 2 Virgin Islands Miocene Oligocene and Miocene Getuyoto beds 2 Eingshill marl 2 Caroline Islands (Yap) Oligocene Oligocene Jealousy formation 2 Tomil agglomerate 2 Upper Cretaceous Pre-Tertiary(t) Mount Eagle volcanics (as Yap formation 2 series !) Hawaii (Island of Hawaii) Pacific Islands Quaternary (see also Tertiary, upper, Detailed information on the geologic to Quaternary) formations of all of the smaller Glenwood tuff 2 islands in the Mid-Pacific area can be found in the Lexique Stratigra- Kapukapu tuff 2 phique International, v. 1, Oceanic Olaa agglomerate 2 fascicule 2, Oceanie Proprement Waiau formation 2 Dite. Waimea formation 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 619

Pacific Islands Continued Pacific Islands Continued Hawaii (Island of Hawaii) Con. Hawaii (Island of Maui) Continued Recent Pleistocene(?) Huehue flow 2 Big Falls picritic basalt * Keanakakoi formation 2 Hanawi basaltic andesite 2 Recent and Pleistocene, upper(?) Eapaula basaltic andesite 2 Eamehame basalt 1 Eeanae basalt 2 Eau volcanic series 2 Eilea volcanics 2 Kona tuff formation 2 Eipahula formation 2 Puna volcanic series 2 Kuhiwa basaltic andesite 2 Pleistocene or Recent Makaino basaltic andesite * Uwekahuna ash 2 Makapipi basalt 2 Pleistocene and Recent Mossman picritic basalt 3 Hualalai volcanic series 2 Ohia basalt 2 Honolulu volcanic series 1 Paakea basalt 2 Pleistocene and Recent(f) Pauwalu basalt 2 Laupahoehoe volcanic series 2 Piinaau basalt 2 Pleistocene Waiaaka basaltic andesite * Hawi volcanic series 2 Wailuanui basalt 2 Eahuku volcanic series 2 N Waiokamilo basalt 2 Makanaka drift and stage 2 Pleistocene, lower, or Pliocene, 'up- Pahala ash (as basalt ') per(?) Pohakuloa drift and stage 2 Honolua volcanic series * Waihu fanglomerate 2 Pliocene(?) Pleistocene(f) Wailuku volcanic series * Hilina volcanic series 2 Tertiary, upper (?) Waawaa volcanics 2 Honomanu volcanic series * Tertiary, upper, to Quaternary Eula volcanic series 2 Hamakua volcanic series 2 Hawaii (Island of Molokai) Pliocene(f) Pleistocene(f) Ninole volcanic series (as Ealaupapa basalt 2 basalt1) Pliocene Pololu volcanic series 2 West Molokai volcanic series * Hawaii (Island of Kahoolawe) Pliocene(f) Pliocene(f) East Molokai volcanic series * Eanapou volcanic series 2 Hawaii (Island of Niihau) Hawaii (Island of Kauai) Pleistocene Pleistocene and Recent Eiekie volcanic series 2 Eoloa volcanic series 2 Pliocene (?) Pleistocene Paniau volcanic series' 2 Palikea formation 2 Hawaii (Island of Oahu) Pliocene(f) Quaternary Haupu formation 2 Aliamanu basalt 2 (subsurface) Makaweli formation 2 Kaau mud flow 2 Mokuone member (of Makaweli Kii Point limestone 2 formation) 2 Pyramid Rock basalt.* Napali formation 2 Recent Olokele formation 2 Black Point ash 2 Waimea Canyon volcanic series 2 Diamond Head talus breccia 1 Ealama volcanics 1 Kauai lavas 2 Waimea conglomerate 2 Pleistocene (?) Hawaii (Island of Lanai) Eolekole volcanics 2 Pliocene and Pleistocene (?) Pleistocene, upper, or Recent Lanai volcanic series (as basalt1) Eaupo basalt 1 Age(f) Eoko volcanics/ Manele basalt l Manana tuff 1 Hawaii (Island of Maui) Sugar Loaf basalt l Pleistocene or Recent(f) Tantalus basalt 1 Lahaina volcanic series 2 Laina volcanics 2 Pleistocene, upper, and Recent Pleistocene and Recent Eaohikaipu volcanics * Hana volcanic series 2 Pleistocene, upper Pleistocene Ainoni volcanics 1 Eaupo mud flow 2 Aliamanu tuff» 620 GEOLOGIC NAMES OF NORTH AMERICA

Pacific Islands Continued Pacific Islands Continued Hawaii (Island of Oahu) Continued Mariana Islands (Pagan) Pleistocene, upper Continued Recent Black Point basalt» Pagan limestone 2 Castle volcanics 1 Mariana Islands (Rota) Diamond Head tuff l Recent Fort Shafter gravel l Mirikattan limestone a Haiku volcanics > Pleistocene Hawaiiloa volcanics l Rota limestone 2 Eaau volcanics l Pliocene(f) Eaimuki volcanics l Poniya limestone 2 Kalihi volcanics l Miocene, lower Eamanaiki basalt l Hirippo limestone 2 Kaneohe volcanics 1 Oligocene () Kupikipikio basalt l or black Taihamu (Taihanom) limestone * ash 1 Eocene Makalapa tuff l Manila agglomerate 2 Makawao breccia l Mariiru beds 2 Maunawili volcanics ' Mariana Islands (Saipan) Mauumae volcanics * Pleistocene or Recent Mokapu basalt l Tanapag limestone 2 Mokolea basalt (as Mokulea Pleistocene basalt») Chacha limestone 2 Moku Mann volcanics 1 Pliocene and Pleistocene Nuuanu volcanics l Naftan limestone 2 Pali volcanics l Miocene, lower Punchbowl volcanics l Donni sandstone member (of Rocky Hill volcanics l Tagpochau limestone) 2 Salt Lake tuff» Laulau limestone 2 Training School volcanics l Machegit conglomerate member Ulupau tuff 1 (of Tagpochau limestone) * Pliocene Tagpochau limestone * Pearl Harbor series l Eocene Pearl River series 1 As Perdido (Asuberudedo) beds * Pliocene (?) Eocene(?) Eailu volcanic series 1 Sankakuyama formation 2 Koolau volcanic series 1 Eocene, upper Waianae volcanic series * Densinyama formation 8 Age(?) Hagman formation 8 Black Point limestone 8 Matansa limestone 2 Mariana Islands (Aguijan) Mariana Islands (Tinian) Pliocene Recent Aguijan limestone 2 Dankuro limestone 2 Mariana Islands (Farallon de Medin- Pleistocene iUa) Mariana limestone 2 Oligocene (Aquitanian) Sonson limestone 2 Medinilla (Lower and Upper) Pliocene or Pleistocene limestone 2 Carolinas limestone 2 Mariana Islands (Guam) Oligocene (Aquitanian) Recent Kasutesyo limestone 2 Merizo limestone 2 Lasso limestone 2 Pleistocene Tinian beds 2 Barrigada limestone 8 Eocene Pliocene Marino agglomerate 2 Sumay limestone 2 Marino beds 2 Talofofo peat-bearing beds 2 Samoa Islands Oligocene (Aquitanian) Recent Asan limestone 2 Aunuu tuff 2 Eocene Recent(f) Balanos andesite 2 Leone volcanics 2 Fena beds 2 Pliocene(f) Nagas beds 2 Alofau volcanics 8 Santa Rosa beds 2 Masefau volcanics 2 Umatac andesite * Olomoana volcanics 2 INDEX TO THE GEOLOGIC NAMES OF NORTH AMERICA 621

Pacific Islands Continued Pacific Islands Continued Samoa Islands Continued Samoa Islands Continued Pliocene(f) Continued Pliocene or Pleistocene, lower Con. Taputapu volcanics 2 Pioa breccia 2 Pliocene and Pleistocene(?) Pioa rhyolite 2 Pago volcanic series 2 Vatia trachyte 2 Pliocene or Pleistocene, lower Pliocene and lower Pleistocene(?) Afono trachyte 2 Fagasa gabbro 2 Matafao breccia 2 Lefulufulua trachyte 2 Matafao trachyte 2 Leila trachyte 2 Papatele trachyte 2 Tau trachyte 2 ADDITIONS AND CORRECTIONS TO "ROCK UNITS" Additions: The following new units are being used by the U.S. Geological Survey as formations containing earlier named units as members: Frailes formation (C. A. Kaye, 1959, U.S. Geol. Survey Prof. Paper 317-A, p. 16), Upper Cretaceous of Puerto Rico (p. 616) Houy formation (P. E. Cloud, V. E. Barnes, and W. H. Hass, 1957, Geol. Soc. America Bull., v. 68, no. 7, p. 810-816), Devonian and Lower Mississippian of Texas (p. 554) Owens Valley formation (C. W. Merriam and W. E. Hall, 1957, U.S. Geol. Survey Bull. 1061-A, p. 7-12), Permian of California (p. 450) Recent additions to and revisions of Survey usage made too late to be included in the text: Genesee formation (as group ), Upper Devonian of New York (p. 512), containing the following members: Geneseo shale > member (p. 512) Genundewa limestone member (as lentil of Geneseo shale >) (p. 512) Ithaca member (as shale member of Portage formation l) (p. 512) Penn Yan shale member (as Tongue of West River shale 2) (p. 512) Renwick shale member l (p. 512) Sherburne flagstone member (as member of Portage formation !) (p. 512) West River shale 1 member (p. 512) Keyser limestone (as member of Helderberg limestone 1), Upper Silurian and Lower Devonian (?) of West Virginia (p. 571) McElroy formation (as member of Fayette sandstone 1), upper Eocene of Texas (p. 546), containing the following members: Dilworth sandstone member (as sand') (p. 545) Manning clay member (as beds *) (p. 545) Shublik formation,1 Middle and Upper Triassic of Alaska (p. 433) Wells formation,1 Pennsylvanian and Permian of Idaho (p. 460) 622 GEOLOGIC NAMES OF NORTH AMERICA

Additions: Whitsett formation (as beds 1), upper Eocene of Texas (p. 546), containing the following members: Calliham sandstone member (as sand') (p. 545) Dubose member (as sands and clays >) (p. 546) Fashing clay member (as clay !) (p.546) Stones Switch sandstone member (as sand') (p. 546) Corrections: fSharon coal group,1 Lower Pennsylvanian of Maryland, omitted from text Sugarloaf quartz latite (p. 435), Cretaceous or Tertiary of Arizona (James Gilluly, 1956, U.S. Geol. Survey Prof. Paper 281, p. 90-93), erroneously entered in part A (p. 354) with reference belonging to Sugarloaf series (see below) Sugarloaf series, Cenozoic of Arizona (H. E. Enlows, 1951, Tulsa Geol. Soc. Digest, v. 19, p. 105-107) The names listed below are cited under erroneous localities in the text: Bromley shale (in Cynthiana formation),1 Middle Ordo- vician of Kentucky (p. 522) Floyd shale,1 Upper Mississippian of Georgia (p. 430) Drywood formation or coal group,1 Pennsylvanian (Des Moines) of Missouri (p. 526)