DOCSLIB.ORG

Contributions to Stratigraphy 1965

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Contributions to Stratigraphy 1965 Contributions to Stratigraphy 1965 GEOLOGICAL SURVEY BULLETIN 12,24 This volume was published as separate chapters A-J UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library of Congress catalog-card No. GS 66-235 CONTENTS [Letters designate the separately published chapters] (A) Changes in stratigraphic nomenclature by the U.S. Geological Survey, by George V. Cohee and Walter S. West. (B) Clays Ferry Formation (Ordovician) a new map unit in south-central Kentucky, by Gordon W. Weir and Robert C. Greene. (C) The Lexington Limestone (Middle Ordovician) of central Kentucky, by Douglas F. B. Black, Earle R. Cressman, and William C. MacQuown, Jr. (D) Galloway Creek Limestone and Ashlock and Drakes Formations (Upper Ordovician) in south-central Kentucky, by Gordon W. Weir, Robert C. Greene, and George C. Simmons. (E) Geyser Creek Fanglomerate (Tertiary), La Sal Mountains, Eastern Utah, by W. D. Carter and J. L. Gualtieri. (F) Borden Formation (Mississippian) in south- and southeast-central Kentucky, by G. W. Weir, J. L. Gualtieri, and S. 0. Schlanger. (G) The Yakima Basalt and Ellensburg Formation of south-central Washington, by J. W. Bingham and M. J. Grolier. (H) Stratigraphy and regional relationships of a reference section for the Juana Lopez Member, Mancos Shale, in the San Juan Basin, New Mexico, by Carle H. Dane, William A. Cobban, and Erie G. Kauffman. (I) Harrodsburg Limestone in Kentucky, by E. G. Sable, R. C. Kepferle, and W. L. Peterson. (J) Stratigraphic names in the New London area, Connecticut, by Richard Goldsmith. o Changes in Stratigraphic Nomenclature by the U.S. Geological Survey 1964 By GEORGE V. COHEE and WALTER S. WEST CONTRIBUTIONS TO STRATIGRAP H Y GEOLOGICAL SURVEY BULLETIN 1224-A UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1965 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 30 cents (paper cover) CONTENTS Listing of nomenclatural changes. __ __. ._-_-_-___-_--_-___-_-___ Al New names adopted for official use in U.S. Geological Survey reports. 2 Previously used names adopted for official use in U.S. Geological Sur­ vey reports.. _ _____ _ _______-_--__-_-_____-_-____-_________ 6 Stratigraphic names revised_______--_-_---___--_______________-_ 10 Changes in age designation. ..___1_1_'__.____ _-____-__.._____.____ 16 Stratigraphic names reinstated. ___--___---_____-_____..__________ 22 Stratigraphic names abandoned..-..-.------.--------.. 22 Denny Creek Granodiorite Gneiss, Browns Pass Quartz Monzonite, and Kroenke Granodiorite, Mount Harvard quadrangle, Colorado, by Fred Barker and M. R. Brock.. ___ _________---_--_--____--______- _ 23 Denny Creek Granodiorite Gneiss. --_._--___-__-____.-_::____:__ 23 Browns Pass Quartz Monzonite- ________________________________ 25 Kroenke Granodiorite _ ______________ ____________..._____ ____ 26 South Pass Formation on the southwest flank of Wind River Mountains, Wyoming, by Norman M. Denson, Howard D. Zeller, and E. Vernon Stephens. ___ _ _ __. :____ . _ _ __ ___ _____ 27 Nomenclature and age of formations in the Ansonia quadrangle, Fairfield and New Haven Counties, Connecticut, by Crawford E. Fritts. _______ 30 Belted Range Tuff of Nye and Lincoln Counties, Nevada, by K. A. Sar- >gent, D. C: Noble, and E. B. Ekren __ .-__._ - _ ______ _______ 32 Belted Range Tuff. _____ _______ _________ ___ ________ ___:__ 33 Tub Spring Member: _:____________________'_____..________ 34 Grouse Canyon Member. ______ _-_-_-_._____.___..________ 36 Salyer and Wahmonie Formations of southeastern Nye County, Nevada, by F. G. Poole, W. J. Carr, and D. P. Elston.. ________ ____..__. 36 Stratigraphic relations _ .. _ -____--_--_-_--_-__-_-__--__________ 40 Lithologic description. ____-_______-_-_-_--:_____-__________:___ 40 Chemical composition. __ ___-_____----_-----_______---- _..__ _:___ 43 Age, ___._-__-__---_.---_____:.--:_-- _ _.- __ : _ 43 Paintbrush Tuff and Timber Mountain Tuff of Nye County, Nevada, by Paul P. Orkild. _ __- _ _ _ _.____:-- _--______. _ _ __ .___::__ 44 Paintbrush Tuff ___- ____r- __ .._..._ ::_-..__. _ . _ . _____ 45 Pah Canyon Member________-- _-__-.__-_____________:___ 49 Timber Mountain Tuff __ ___._ _____-_.- _-__.___._ _ __________ 49 Rainier Mesa Member. -_-_-__-__.--_-_-___.___-.__._-____ 50 Tuff of Cat Cany on. _ _ _ ... _ __...__ _ _.___.. _ ___ _ 50 Tuff of Transvaal. _ . -. _-_- _ _ _ _-_ _'. _ : _-i _ _ _ . _ __________ 50 Ammonia Tanks Member ___ ...^.. ............... _..___.__ 50 Age_____. ___..-__-._ . -_______-._.--___...._.__...._...____ 51 Age of the Eleana Formation (Devbman'arid Mississippian) in the Nevada Test Site, by F. G. Poole, Paul P. Orkild, Mackenzie Gordon, Jr., and Helen Duncan ______ _-^____-_.-_ __------_---_-----______________ 51 ...... m IV CONTENTS Page Marinette Quartz Diorite and Hoskin Lake Granite of northeastern Wis­ consin, by William C. Prinz ___ __________________________________ A53 Mashel Formation of southwestern Pierce County, Washington, by Kenneth L. Walters __ ____________ _ __________________________ 55 Character and thickness________________________________________ 55 Age and climatic implications--__-_____---_----__---___________- 58 Distribution. __ ________ _ ______ _ ________________________ 59 -. Mode of deposition- ___________________________________________ 59 Precambrian and Lower Cambrian formations in the Last Chance Range area, Inyo County, California, by John H . Stewart _ _ ______ 60 Miocene and Pliocene rocks of central Wyoming, by Norman M. Denson. 70 References _ ____ ____________ _____________.____-_-'________-- 74 ILLUSTRATIONS .... FIGURE 1. Map of Mount Harvard quadrangle, Colorado, showing gen­ eralized distribution of major Precambrian intrusive rocks. A24 2. Geologic map of the South Pass area, Wyoming.___________ 28 3. Geologic map showing the distribution of the Tub Spring and Grouse Canyon Members of the Belted Range Tuff in the northeastern part of the Nevada Test Site and the south­ eastern part of the Las Vegas Bombing and Gunnery Range. 34 4. Stratigraphic nomenclature of the Indian Trail Formation and Belted Range Tuff.________.____._____. 35 5. Index map of Nevada Test Site showing topographic quad­ rangles and distribution of Salyer and Wahmonie Forma­ tions. _ . __ _____ 37 6. North-south section in Cane Spring quadrangle showing rela­ tions between volcanic units.__________-_-_.-_____ 39 7. Map of Nevada Test Site and vicinity showing localities re­ ferred to in text___ 45 8. Stratigraphic nomenclature of Tertiary volcanic rocks of the Nevada Test Site______________________ 47 9. Schematic diagram of the Tertiary volcanic rocks ________ 48 10. Index map of southwestern Pierce County area, Washington-. 55 11. Index map showing location of measured sections in Last Chance Range area, California.________________.. 60 12. Precambrian and Lower Cambrian formations in Last Chance . Range area. _______________________________ 61 ,., 13. Columnar section of Deep Spring Formation and related strata in northern Last Chance Range area. ___________ 64 14. Columnar sections and correlations of Lower Cambrian strata in Last Chance Range area. ___________________________ 66 TABLE Pag« TABLE 1. Chemical and modal analyses of Denny Creek Granodiorite : Gneiss, Browns Pass Quartz Monzonite, and Kroenke Granodiorite, Mount Harvard quadrangle, Colorado...__.-- A25 CONTRIBUTIONS TO STRATIGRAPHY CHANGES IN STRATIGRAPHIC NOMENCLATURE BY THE U.S. GEOLOGICAL SURVEY, 1964 By GEORGE V. COHEE and WALTER S. WEST LISTINGS OF NOMENCLATUBAL CHANGES In the following listings, the changes in stratigraphic nomenclature are grouped together in the categories of (1) new names adopted, (2) previously used names adopted, (3) names revised, (4) changes in age designation, (5) names reinstated, and (6) names abandoned. The stratigraphic names involved in change are listed alphabetically under each category. The age of the unit, the area in which the name is employed, the title of the report, and the publication in which the change is described are given. - A I A2 CONTRIBUTIONS TO STRATIGRAPHY «~.2 CQ J9 13 S & PM S IPS a 823 FL, PH W 1 > a MX 2 a 3.3 ** 6 Il|«2gll|^l ra WM"9 uSaB_'S SliSlg|'C-2° -Sofl MaSjg . iSril'i |Q!. f^S H^0« fl - gSd^t^ -gS §js<o ilSift-W o |i&!3 || °li| iiiiii|gQij|f Hi «§sl >.»sa&2 Ow |ggPQ»J33«CQ fe&H !Illfl-:l!ll!l o 03 11 III a^sllafg^ 2 <S ,Xslr-\ d ?rft*s (3 03 ,-, fiSlmSl&F^o gP®"5 W g 3o o o p H O 9 Pnd CQ .2 S W EH H fc m W « o Hyden, H. McAndrews, and Ri H Tschudy. Foote Creek Formation _ ..... Late Cretaceous and ...do-. ............. ..do........ ..... ...... 1965 Paleocene. Frenchie Creek Bhyolite (of Pony Geology of the. Frenchie Creek quadrangle, Bull. 1179........ ........ 1964 Trail Group). north-central Nevada, by L. J. P. Muffler. [1965] Gold Flat Member (of Thirsty .....do...... ........... Thirsty Canyon Tuff of Nye and Esmeralda f>rf\f T^arwir 47** T^ 1964 Canyon Tuff). Counties, Nevada, by D.C. Noble, R. E. Anderson, E. B. Ekren, and J. T. 0' Connor. Grier Limestone Member (of Middle Ordovician .... Kentucky.. __ . __ Geology of the Tyrone quadrangle, Kentucky, Map GQ-303. _ .. ..__. 1964 Lexington Limestone). by E. B. Cressman. Marinette Quartz Diorite and Hoskin Lake Granite of northeastern Wisconsin, by W. C. Prinz. Kirkham Hollow Volcanics ........ middle Pliocene or Geology of the Garns Mountain quadrangle, Bull. 1205. __ ... _ . 1965 younger. Bonneville, Madison and Teton Counties, Idaho, by M. H. Staatz and H. F. Albee. Paleocene through Reconnaissance geology of Admiralty Island, Bull.
Load more

Recommended publications
  • Modern Shale Gas Development in the United States: a Primer
    U.S. Department of Energy • Office of Fossil Energy National Energy Technology Laboratory April 2009 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe upon privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Modern Shale Gas Development in the United States: A Primer Work Performed Under DE-FG26-04NT15455 Prepared for U.S. Department of Energy Office of Fossil Energy and National Energy Technology Laboratory Prepared by Ground Water Protection Council Oklahoma City, OK 73142 405-516-4972 www.gwpc.org and ALL Consulting Tulsa, OK 74119 918-382-7581 www.all-llc.com April 2009 MODERN SHALE GAS DEVELOPMENT IN THE UNITED STATES: A PRIMER ACKNOWLEDGMENTS This material is based upon work supported by the U.S. Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory (NETL) under Award Number DE‐FG26‐ 04NT15455. Mr. Robert Vagnetti and Ms. Sandra McSurdy, NETL Project Managers, provided oversight and technical guidance.
    [Show full text]
  • Harrodsburg Limestone in Kentucky
    Harrodsburg Limestone In Kentucky By E. G. SABLE, R. C. KEPFERLE, and W. L. PETERSON CONTRIBUTIONS TO STRATIGRAPHY GEOLOGICAL SURVEY BULLETIN 1224-1 Prepared in cooperation with the Com­ monwealth of Kentucky, University of Kentucky, Kentucky Geological Survey UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director U.S. GOVERNMENT PRINTING OFFICE, WASHINGTON : 1966 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 10 cents (paper cover) CONTENTS Fag* Abstract.________________________________________________________ II Introduction.____________________________-_--____--____-__--_-_--_ 1 History of nomenclature_________________ ______________________ 1 Harrodsburg Limestone redefined in Kentucky._______________________ 6 Round Hollow section__-__-___-_---____._-___-_----__-._.__--_.__ 7 Correlations._____________________________________________________ 11 References cited.................__________________________________ 11 ILLUSTRATIONS Pag» FIGURE 1. Stratigraphic nomenclature of selected Mississippian units in 12 northwest-central Kentucky __________________________ 2. Map of central Kentucky showing counties and topographic quadrangles referred to in this re port..____.___.._.__.__.__ 4 ill 799-251 66 CONTRIBUTIONS TO STRATIGRAPHY HARRODSBURG LIMESTONE IN KENTUCKY By E. G. SABLE, R. C. KEPFERLE, and W. L. PETERSON ABSTRACT The Harrodsburg Limestone (Mississippian) in northwest-central Kentucky consists of 20 to 50 feet of light-gray coarse-grained fossil-fragmental limestone and minor silty limestone. It underlies the Salem Limestone, overlies the Borden Formation, and includes the Leesville and Guthrie Creek Members, of the Lower Harrodsburg of P. B. Stockdale and the Harrodsburg (restricted) as used by him. INTRODUCTION The name Harrodsburg Limestone was given (Hopkins and Sieben- tlial, 1897) to a unit of predominantly carbonate rocks of Mississippian age in Indiana and was subsequently used in Kentucky.
    [Show full text]
  • New Insects from the Earliest Permian of Carrizo Arroyo (New Mexico, USA) Bridging the Gap Between the Carboniferous and Permian Entomofaunas
    Insect Systematics & Evolution 48 (2017) 493–511 brill.com/ise New insects from the earliest Permian of Carrizo Arroyo (New Mexico, USA) bridging the gap between the Carboniferous and Permian entomofaunas Jakub Prokopa,* and Jarmila Kukalová-Peckb aDepartment of Zoology, Faculty of Science, Charles University, Viničná 7, CZ-128 43 Praha 2, Czech Republic bEntomology, Canadian Museum of Nature, Ottawa, ON, Canada K1P 6P4 *Corresponding author, e-mail: [email protected] Version of Record, published online 7 April 2017; published in print 1 November 2017 Abstract New insects are described from the early Asselian of the Bursum Formation in Carrizo Arroyo, NM, USA. Carrizoneura carpenteri gen. et sp. nov. (Syntonopteridae) demonstrates traits in hindwing venation to Lithoneura and Syntonoptera, both known from the Moscovian of Illinois. Carrizoneura represents the latest unambiguous record of Syntonopteridae. Martynovia insignis represents the earliest evidence of Mar- tynoviidae. Carrizodiaphanoptera permiana gen. et sp. nov. extends range of Diaphanopteridae previously restricted to Gzhelian. The re-examination of the type speciesDiaphanoptera munieri reveals basally coa- lesced vein MA with stem of R and RP resulting in family diagnosis emendation. Arroyohymen splendens gen. et sp. nov. (Protohymenidae) displays features in venation similar to taxa known from early and late Permian from the USA and Russia. A new palaeodictyopteran wing attributable to Carrizopteryx cf. arroyo (Calvertiellidae) provides data on fore wing venation previously unknown. Thus, all these new discoveries show close relationship between late Pennsylvanian and early Permian entomofaunas. Keywords Ephemeropterida; Diaphanopterodea; Megasecoptera; Palaeodictyoptera; gen. et sp. nov; early Asselian; wing venation Introduction The fossil record of insects from continental deposits near the Carboniferous-Permian boundary is important for correlating insect evolution with changes in climate and in plant ecosystems.
    [Show full text]
  • Figure 3A. Major Geologic Formations in West Virginia. Allegheney And
    82° 81° 80° 79° 78° EXPLANATION West Virginia county boundaries A West Virginia Geology by map unit Quaternary Modern Reservoirs Qal Alluvium Permian or Pennsylvanian Period LTP d Dunkard Group LTP c Conemaugh Group LTP m Monongahela Group 0 25 50 MILES LTP a Allegheny Formation PENNSYLVANIA LTP pv Pottsville Group 0 25 50 KILOMETERS LTP k Kanawha Formation 40° LTP nr New River Formation LTP p Pocahontas Formation Mississippian Period Mmc Mauch Chunk Group Mbp Bluestone and Princeton Formations Ce Obrr Omc Mh Hinton Formation Obps Dmn Bluefield Formation Dbh Otbr Mbf MARYLAND LTP pv Osp Mg Greenbrier Group Smc Axis of Obs Mmp Maccrady and Pocono, undivided Burning Springs LTP a Mmc St Ce Mmcc Maccrady Formation anticline LTP d Om Dh Cwy Mp Pocono Group Qal Dhs Ch Devonian Period Mp Dohl LTP c Dmu Middle and Upper Devonian, undivided Obps Cw Dhs Hampshire Formation LTP m Dmn OHIO Ct Dch Chemung Group Omc Obs Dch Dbh Dbh Brailler and Harrell, undivided Stw Cwy LTP pv Ca Db Brallier Formation Obrr Cc 39° CPCc Dh Harrell Shale St Dmb Millboro Shale Mmc Dhs Dmt Mahantango Formation Do LTP d Ojo Dm Marcellus Formation Dmn Onondaga Group Om Lower Devonian, undivided LTP k Dhl Dohl Do Oriskany Sandstone Dmt Ot Dhl Helderberg Group LTP m VIRGINIA Qal Obr Silurian Period Dch Smc Om Stw Tonoloway, Wills Creek, and Williamsport Formations LTP c Dmb Sct Lower Silurian, undivided LTP a Smc McKenzie Formation and Clinton Group Dhl Stw Ojo Mbf Db St Tuscarora Sandstone Ordovician Period Ojo Juniata and Oswego Formations Dohl Mg Om Martinsburg Formation LTP nr Otbr Ordovician--Trenton and Black River, undivided 38° Mmcc Ot Trenton Group LTP k WEST VIRGINIA Obr Black River Group Omc Ordovician, middle calcareous units Mp Db Osp St.
    [Show full text]
  • Geohydrology of the Oklahoma Panhandle Beaver, Cimarron And
    GEOHYDROLOGY OF THE OKLAHOMA PANHANDLE, BEAVER, CIMARRON, AND TEXAS COUNTIES By D. l. Hart Jr., G. l. Hoffman, and R. L. Goemaat U. S. GEOLOGICAL SURVEY Water Resources Investigation 25 -75 Prepared in cooperation with OKLAHOMA WATER RESOURCES BOARD April 1976 UNITED STATES DEPARTMENT OF THE INTERIOR Thomas Kleppe, Secretary GEOLOGICAL SURVEY v. E. McKelvey, Director For additional information write to~ U.S. Geological Survey Water Resources Division 201 N. W. 3rd Street, Room 621 Oklahoma City, Oklahoma 73102 ii CONTENTS Pa,;e No. Factors to convert English units to metric units ..•..................... v Ab s t raet .. .. .. .. .. .. .. .. .. .. .. I' of '" " " of .. .. ••• .. of " •, '" 7 I ntroduc t ion. ......•....•............................................... 8 Purpose and scope of investigation 8 Location and general features of the area.••..........•............ 8 Previous investigations .•.......................................... 10 Well-numbering system.•...............................•............ 10 Acknowledgments. .......•......................................... .. 13 Geology. ....•.•....................................................... .. 13 ~ Regional geology ill .. II II II oil II oil It It It "" oil 13 Geologic units and their water-bearing properties 16 Permian System...•.......................•.................... 16 Permian red beds undifferentiated...............•........ 16 Triassic System..•.•.........•...........•.................... 16 Dockt.JIn Group ~ 4 ~ #' ., of ,. '" ., # of ,. ,. .. ". 16 Jurassic
    [Show full text]
  • Xenacanthus (Chondrichthyes: Xenacanthiformes) from North America
    Acta Geologica Polonica, Vol. 49 (J 999), No.3, pp. 215-266 406 IU S UNES 0 I Dentitions of Late Palaeozoic Orthacanthus species and new species of ?Xenacanthus (Chondrichthyes: Xenacanthiformes) from North America GARY D. JOHNSON Department of Earth Sciences and Physics, University of South Dakota; 414 East Clark Street, Vermillion, SD 57069-2390, USA. E-mail: [email protected] ABSTRACT: JOHNSON, G.D. 1999. Dentitions of Late Palaeozoic Orthacanthus species and new species of ?Xenacanthus (Chondrichthyes: Xenacanthiformes) from North America. Acta Geologica Polonica, 49 (3),215-266. Warszawa. Orthacanthus lateral teeth have paired, variably divergent, smooth, usually carinated labio-lingually compressed principal cusps separated by a central foramen; one or more intermediate cusps; and an api­ cal button on the base isolated from the cusps. Several thousand isolated teeth from Texas Artinskian bulk samples are used to define the heterodont dentitions of O. texensis and O. platypternus. The O. tex­ ensis tooth base has a labio-Iingual width greater than the anteromedial-posterolateral length, the basal tubercle is restricted to the thick labial margin, the principal cusps are serrated to varying degrees, and the posterior cusp is larger. The O. platypternus tooth base is longer than wide, its basal tubercle extends to the center, the labial margin is thin, serrations are absent on the principal cusps, the anterior cusp is larger, and a single intermediate cusp is present. More than two hundred isolated teeth from Nebraska (Gzhelian) and Pennsylvania (Asselian) provide a preliminary description of the heterodont dentition of O. compress us . The principal cusps are similar to O.
    [Show full text]
  • By JB Gillespie and GD Hargadine
    GEOHYDROLOGY AND SALINE GROUND-WATER DISCHARGE TO THE SOUTH FORK NINNESCAH RIVER IN PRATT AND KINGMAN COUNTIES, SOUTH-CENTRAL KANSAS By J.B. Gillespie and G.D. Hargadine U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 93-4177 Prepared in cooperation with the CITY OF WICHITA, SEDGWICK COUNTY, and the KANSAS WATER OFFICE Lawrence, Kansas 1994 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Robert M. Hirsch, Acting Director For additional information write to: Copies of this report can be purchased from: U.S. Geological Survey District Chief Earth Science Information Center U.S. Geological Survey Open-File Reports Section Water Resources Division Box 25286, MS 517 4821 Quail Crest Place Denver Federal Center Lawrence, Kansas 66049-3839 Denver, Colorado 80225 CONTENTS Page Definition of terms.......................................................................................................................... vii Abstract............................................................................................................................................. 1 Introduction....................................................................................................................................... 1 Purpose and scope................................................................................................................2 Previous studies................................................................................................................... 4 Acknowledgments ................................................................................................................4
    [Show full text]
  • Geology of Gambrill State Park
    Introduction A West Gambrill State Park is located along the eastern edge of the Blue Ridge b Physiographic Province. The Blue Ridge Mountains stretch from northern Georgia to southern Pennsylvania. The Blue Ridge is made up of folded Eas x t rocks that are broken in places by faults. In Maryland, the Blue Ridge b consists of two separate ridges-Catoctin Mountain, locally known as A B C Braddock Mountain on the east, and South Mountain to the west. The Blue Figure 1. Rocks of Gambrill State Park. A, Catoctin Formation. Green- Ridge is bordered on the east by the Piedmont Physiographic Province. The ish metamorphosed basalts. B, Loudoun Formation. Volcanic ash Piedmont is underlain by metamorphic rocks that were formed when the containing pebbles of lava (at A). C, Weverton Formation. Cross- 9 W Appalachian Mountains were uplifted more than 250 million years ago bedded sandstone (b=bedding, x=cross-bedding) . ever C ton Form (hereafter Ma). What we see from Catoctin Mountain today is the result of to weathering and erosion. As a result of this durability, the Weverton ation millions of years of erosion of those mountains. Formation represents the main ridge-forming layer on both Catoctin and Bedrock Layers South mountains of the Blue Ridge of Virginia, Maryland, and Pennsylvania. Nearly all of the rocks present in the park are assignable to three These ridges are erosional features left standing high after the softer or more geologic rock units, called formations. These are the Catoctin, the Loudoun, soluble rocks on either side were worn down by weathering and erosion.
    [Show full text]
  • Catoctin Formation
    Glimpses of the Past: THE GEOLOGY of VIRGINIA The Catoctin Formation — Virginia is for Lavas Alex Johnson and Chuck Bailey, Department of Geology, College of William & Mary Stony Man is a high peak in Virginia’s Blue Ridge Mountains that tops out at just over 1200 m (4,000’). Drive south from Thornton Gap along the Skyline Drive and you’ll see the impressive cliffs of Stony Man’s northwestern face. These are the cliffs that give the mountain its name, as the cliffs and slopes have a vague resemblance to a reclining man’s forehead, eye, nose, and beard. Climb to the top and you’ll see peculiar bluish-green rocks exposed on the summit that are ancient lava flows, part of a geologic unit known as the Catoctin Formation. From the presidential retreat at Camp David to Jefferson’s Monticello, from Harpers Ferry to Humpback Rocks, the Catoctin Formation underlies much of the Blue Ridge. This distinctive geologic unit tells us much about the long geologic history of the Blue Ridge and central Appalachians. Stony Man’s summit and northwestern slope, Shenandoah National Park, Virginia. Cliffs expose metabasaltic greenstone of the Neoproterozoic Catoctin Formation. (CMB photo). Geologic cross section of Stony Man summit area (modified from Badger, 1999). The Catoctin Formation was first named by Arthur Keith in 1894 and takes its name for exposures on Catoctin Mountain, a long ridge that stretches from Maryland into northern Virginia. The word Catoctin is rooted in the old Algonquin term Kittockton. The exact meaning of the term has become a point of contention; among historians the translation “speckled mountain” is preferred, however local tradition holds that that Catoctin means “place of many deer” (Kenny, 1984).
    [Show full text]
  • Geologic Resources Inventory Map Document for Fort Larned National Historic Site
    U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Fort Larned National Historic Site GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Fort Larned National Historic Site fols_geology.pdf Version: 6/26/2015 I Fort Larned National Historic Site Geologic Resources Inventory Map Document for Fort Larned National Historic Site Table of Contents Geologic R.e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .M...a..p.. .D..o..c..u..m...e..n..t....................................................................... 1 About the N..P..S.. .G...e..o..l.o..g..i.c. .R...e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .P...r.o..g..r.a..m........................................................... 2 GRI Digital .M...a..p.. .a..n..d.. .S..o..u..r.c..e.. .M...a..p.. .C..i.t.a..t.i.o..n............................................................................... 4 Map Unit Li.s..t.......................................................................................................................... 5 Map Unit De..s..c..r.i.p..t.i.o..n..s............................................................................................................. 6 Qal - Alluvi.u..m... .(.H..o..l.o..c..e..n..e..)............................................................................................................................................. 6 Qp - Uplan.d.. .in..t.e..r..m..i.t.t.e..n..t. .l.a..k.e.. .(..p..la..y..a..).. .d..e..p..o..s..it.s.. .(..la..t.e.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)............................................................. 6 Qds - Eolia.n.. .d..u..n..e.
    [Show full text]
  • Geology of the Ogallala/High Plains Regional Aquifer System in Nebraska
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Papers in Natural Resources Natural Resources, School of April 1995 Geology of the Ogallala/High Plains Regional Aquifer System in Nebraska Robert F. Diffendal University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/natrespapers Part of the Natural Resources and Conservation Commons Diffendal, Robert F., "Geology of the Ogallala/High Plains Regional Aquifer System in Nebraska" (1995). Papers in Natural Resources. 75. https://digitalcommons.unl.edu/natrespapers/75 This Article is brought to you for free and open access by the Natural Resources, School of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in Natural Resources by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Published in Geologic Field Trips in Nebraska and Adjacent Parts of Kansas and South Dakota: Parts of the 29th Annual Meetings of the North-Central and South-Central Sections, Geological Society of America Lincoln, Nebraska Robert F. Diffendal, Jr., Chair Charles A. Flowerday, Editor Guidebook No. 10 Published by the Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln, in conjunction with the GSA regional sections meeting, April 27–28,1995. Geology of the OgallalaIHigh Plains Regional Aquifer System in Nebraska Field Trip No. 6 R. F. (Bob) Diffendal, Jr. Conservation and Survey Division University of Nebraska-Lincoln, Lincoln, NE 68588 This guide is mostly figures with a reference River valley, we have traveled across land underlain section containing some of the pertinent literature on by glacial tills, loesses, and fluvial deposits of Qua- the Cenozoic geology we will see over the next four ternary age.
    [Show full text]
  • Proceedings of the Indiana Academy of Science
    Geologic Contrasts in Indiana State Parks Otis W. Freeman, Indiana University The state parks of Indiana, with sites selected largely for scenic and historic reasons but partly with the intent to secure wide geo- graphical distribution for recreational purposes, contain a fairly com- plete sequence of the geological formations outcropping in the state, besides providing examples for a large majority of the physiographic principles. Evidence of vulcanism is one of the chief things missing, since all of the exposed bedrock in Indiana is of sedimentary origin. Even so, many types of igneous and metamorphic rocks can be picked up among the glacial boulders in the northern part of the state. The oldest exposed rocks are those of the Ordovician period. Ex- cellent outcrops for the study of the Ordovician strata occur in south- eastern Indiana on the west flank of the Cincinnati Arch. The beds are highly fossiliferous and one of the famous collecting grounds for the life forms of this period is near Madison. Clifty Falls State Park includes strata classified in the upper Or- dovician, the Silurian and base of the Devonian periods. The Silurian rocks occupy the hill slopes above the falls and inner gorges in the park with the Devonian capping the higher hills. The Ordovician formations in the park area from the base up- ward, begin with 25 feet of the Bellevue, followed by 115 feet of the Arnheim, 55 feet of the Waynesville, 50 feet of the Liberty, about 32 feet of the Saluda and possibly 6 feet of Whitewater. Shale predominates from the Bellevue through the Liberty and is interbedded with thin layers and lenses of limestone, and in contrast the Saluda is a thick bedded limestone with reef corals occuring near its base.
    [Show full text]