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Memorial to Harold Bowen Willman 1901-1984 JACK A. SIMON and ELWOOD ATHERTON State Geological Survey, Champaign, Illinois 61820 Harold Bowen (“Bo”) Willman, died on July 4, 1984, in Urbana, Illinois, after a brief illness. He was an emi­ nent geologist performing basic and applied research for nearly 60 years in stratigraphy, structure, mineral deposits, and utilization of strata ranging from the through the Pleistocene Systems primarily in Illinois and other midwestern states. He had a far- reaching impact on knowledge of the , , , and Pleistocene Systems. Harold Bowen Willman, the son of Ernest Floyd and Gay Bowen Willman, was born July 30, 1901, in Newcastle, Indiana. He grew up and graduated from high school in Hartford City, Indiana. Bo went to the University of Illinois with an eye on courses in jour­ nalism, but he took a course in geology, and the expe­ rience changed his career. He received a B.A. in 1926, an M.A. in 1928, and a Ph.D. in 1931, all in geology. In the summer of 1924, he worked in British Columbia as a field assistant to Francis P. Shepard. In the summer of 1925, he worked for the Kentucky Geological Survey. In the summers of 1926 and 1927, he worked at the Illinois Geological Survey (ISGS), and was a graduate teaching assistant in geology at the University of Illinois. In 1928, Bo was appointed to the part-time staff at the Illinois State Geological Survey. Initially he worked with J. Marvin Weller in the Areal Geology and Paleontology Division during the summer, and with Gilbert H. Cady in the Coal Division during the school year. He was assigned to assist Albert H. Bell in the Oil and Gas Section in 1930, and he was promoted to associate geologist. In 1937, he was transferred to the Nonfuels Division (later Industrial Minerals Division) under J. E. Lamar, and in 1943, he was appointed full geologist. In 1945, he was named to head the Areal Geology and Pale­ ontology Division, replacing J. Marvin Weller, who accepted a position as professor at the University of Chicago. Although the name was changed to Stratigraphy and Areal Geology Section, Bo continued to head this section for 24 years until he retired in 1969. Sub­ sequently, he worked in the section officially part-time through December 1976, and con­ tinued later, unofficially, until shortly before his death. Bo’s doctoral dissertation was on the general geology and mineral resources of the deep valley of the Illinois River between Chicago and Peoria. It was completed in 1931, and it included Bo’s proposed revision of the Pleistocene and Pennsylvanian stratigraphy for the area. A report by Willman on the geology and mineral resources of the Marseilles, Ottawa, and Streator Quadrangles, supplemented by subsurface studies by J. Norman Payne, was published in 1942 as ISGS Bulletin 66. Bo worked with J. E. Lamar and with him published reports on and dolo­ mites. During World War II, Bo was engaged in resource studies, including feldspar in

57 58 THE GEOLOGICAL SOCIETY OF AMERICA Illinois sands, high-purity in Illinois, and the zinc-lead resources of northwestern Illinois. Reports of these studies were largely published in Illinois Survey series. After the war, Bo and M. M. Leighton, chief of the Illinois Survey, studied the stratig­ raphy, character, and origin of the loess in the Valley. Their work included a two-week field conference in 1949 in the area extending from Iowa City, Iowa, south to Natchez, Mississippi, in cooperation with the state geologists of the states involved. Their findings appeared in ISGS Report of Investigations 149. As discussed in later paragraphs, a similar study was undertaken in the late 1970s. During the late 1940s and early 1950s, Bo worked with J. S. Templeton in a major study on the Champlainian Series (middle Ordovician) of the central United States. Their intensive study led to a detailed lithologie differentiation of the series. In Illinois they dif­ ferentiated 16 formations and more than 50 members. Most of the units were widely trace­ able outside of Illinois, as far as Colorado and New York. A final revision of the report, prepared by Willman, was published as ISGS Bulletin 89. In 1954, John C. Frye became chief of the Illinois State Geological Survey following the retirement of M. M. Leighton. Leighton had maintained a strong program of Pleisto­ cene research in Illinois, and Frye continued this as a major program. Willman and Frye made an unusually capable and productive team for more than 25 years, and they have many publications to their credit. A prominent feature of much of their work was the application of clay mineralogy to the study of Pleistocene stratigraphy. In this they were assisted by Herbert D. Glass, clay mineralogist at the Illinois State Geological Survey. One of Bo’s main interests, born of his breadth of experience, was stratigraphie nomenclature and policy. In 1958, he, with D. H. Swann and John C. Frye, revised the Illinois State Geological Survey policy regarding stratigraphie nomenclature, and pub­ lished a new multiple classification method for the Survey in ISGS Circular 249. In 1970, Willman and Frye collaborated in a publication on Pleistocene stratigraphy of Illinois as ISGS Bulletin 94. Using a multiple stratigraphie classification scheme, they organized the Pleistocene of Illinois into four categories: rock-stratigraphic, soil-stratigraphic, morpho- stratigraphic, and time-stratigraphic. Geologic maps of Illinois had been prepared by James Hall (1843), A. H. Worthen (1875), Stuart Weller (1906, 1907), F. W. DeWoIf and others (1917), and J. Marvin Weller and others (1945). In 1967, the Illinois Survey published an updated 1:500,000 geologic map of Illinois compiled by Willman with the collaboration of other members of the Survey staff. It shows two geologic columns for the state, six cross sections, and six small state inset maps showing special features. Nationally, Bo also participated in compilation of two maps of glacial deposits of North America east of the Rocky Mountains; the last was published by the Geological Society of America in 1959. With the help of several others, Bo also compiled a bibliography and index of Illinois geology through 1965, published in 1958 as ISGS Bulletin 92. A major project undertaken by Bo, with others, was the preparation of a handbook of Illinois stratigraphy, published in 1975 as ISGS Bulletin 95. It briefly described 730 strati­ graphie units named in Illinois, with references to original descriptions, charts showing development of the stratigraphie classifications, and maps indicating the distribution, thickness, and structure of many units. Parts were written by Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon. In addition to the parts he wrote, Willman edited and extensively rewrote contributions from the other authors. In part as a preliminary to this major project, Willman wrote a summary of the geology of the Chicago area, published in 1971 as ISGS MEMORIAL TO HAROLD BOWEN WILLMAN 59 Circular 460, and a report on rock stratigraphy of the Silurian System in northeastern and northwestern Illinois, published in 1973 as ISGS Circular 479. After John Frye retired from the Illinois Geological Survey in 1974, he returned each summer through 1982 to continue field studies with Willman in Illinois (John Frye passed away in the fall of 1982). In 1979, they published a revised map of the glacial boundary in southern Illinois, issued as ISGS Circular 511. In addition, a study of possible old glacia­ tion and origin of the geest in the of northwestern Illinois was prepared by Willman with Frye and H. D. Glass; it was published in 1989 as ISGS Circular 535. In 1975, work was begun within the Department of Landscape Architecture at the University of Illinois for an Illinois Natural Areas Inventory. John White, a biologist, approached Bo with a “few pages [of] crude landform classifications” to show what “they needed to know.” Bo agreed to help, and was hired through the university. A descriptive list was prepared of 160 sites that might be protected in order to represent the geologic diversity of Illinois, and Bo identified the landforms and geologic formations of each. The work was completed in 1978, and White and Willman became lifelong friends. In 1979, Bo was asked to participate as an advisor in a Natural Landmark Evaluation Panel on Geologic Sites for the Heritage Conservation and Recreation Service of the U.S. Department of the Interior. Bo sold his home in Urbana in 1978 and lived alternately with a daughter in New York and a daughter in Oregon (later in Tucson, Arizona). He continued to spend several weeks each summer, in or out of Urbana, working with Frye and Glass and others on field work, research, and manuscripts concerning the Pleistocene. Starting in the late 1970s, Willman, Frye, and Glass embarked on a major project to study the loesses of the lower Mississippi Valley, renewing work done in the late 1940s by M. M. Leighton and Willman. In this new study, more than 1300 samples were taken by 1980 along the Mississippi Valley in the states of Missouri, Kentucky, Arkansas, Tennessee, Mississippi, and , with the help of state surveys and other interested geologists. Initial efforts began in 1980 to develop a manuscript. John Frye’s death in late 1982 resulted in some delay. In the summer of 1983, Willman, Glass, Leon Follmer, and E. Donald McKay conducted a field trip to the lower Mississippi Valley. In January of 1984, from Tucson, Bo wrote a long letter to Charles Collinson, Glass, Follmer, and McKay calling attention to a few problems that needed work before the manuscript could be completed when he returned to Urbana in June. Unfortunately, when Bo came to Urbana in June for his annual physical examination, he was diagnosed as having a serious health problem. He passed away on July 4, 1984. Bo Willman was a Fellow of the Geological Society of America, American Associa­ tion for the Advancement of Science, Illinois State Academy of Science, Geophysical Union, and Sigma Xi. He attended and was a leader on the first meeting of the Tri-State (Illinois, Wisconsin, and Iowa) Geological Society Field Conference in 1933, which was held annually after that. He was a leader occasionally for the next 25 years and was a par­ ticipant for more years than that. He contributed to the International Association for Research (INQUA). He was a member of the Midwest Society of Friends of the Pleistocene since its founding in 1950. Bo was honored at a banquet by the Friends during their 1979 field conference for his 50 years of contributions to Pleistocene geology. His name was included in the first edition of the international Who’s Who in Science in 1968. For more than 50 years, Bo contributed to establishment of principles in stratigraphy and its application. In addition to many committee assignments and cooperation with oth­ 60 THE GEOLOGICAL SOCIETY OF AMERICA ers, he served a three-year term as the Geological Society of America representative to the American Commission on Stratigraphic Nomenclature. In 1979, Bo was approached by the Quaternary Advisory Group of the North American Commission on Stratigraphic Nomen­ clature for his comments on a new proposed code. In a comprehensive letter he made a thoughtful response to many ideas that had been proposed in a working draft. Bo Willman was married in 1931 to Martha Evangeline Righter. She died in 1966. They had two daughters, Martha Gay (Mrs. Morris R. Holland) of Frostburg, , and Virginia Anna Willman of New York; and two grandchildren, Paul Willman and Mrs. Laura Gay Cohen. Bo was exceedingly close to his family. For many years, the Willman family vaca­ tioned in the West, and they all were mountain climbers. Bo was interested in photogra­ phy, bird watching (and the music of birds), and the big bands of 50 years ago. He was handy with tools and helped his daughters with many tasks, including building a barn in Oregon and helping to remodel an apartment in New York. For several years, his daugh­ ters lived on opposite sides of the country. He travelled by bus or train to visit them, but more commonly he drove his ancient station wagon. Bo Willman was an excellent geological scientist who devoted his entire professional life to public service in or through the Illinois State Geological Survey. His warm charac­ ter, knowledge, and imagination helped him to guide colleagues and others in geological and other problems. He was in every way a gentleman; those who were fortunate enough to have known him miss him deeply. SELECTED BIBLIOGRAPHY OF H. B. WILLMAN 1931 (with Lamar, J. E.) High-calcium limestone near Morris, Illinois: Illinois Geological Survey Report of Investigations 23, 26 p. 1933 (with Lamar, J. E.) Results of test drilling of limestone near Morris, Illinois: Illinois Geological Survey Circular 4, 6 p. 1934 (with Lamar, J. E.) Rock wool from Illinois mineral resources: Illinois Geological Survey Bulletin 61, 262 p. 1938 (with Lamar, J. E.) A summary of the uses of limestone and dolomite: Illinois Geological Survey Report of Investigations 49, 50 p. 1939 The Covel Conglomerate, a guide bed in the Pennsylvanian of northern Illinois: Illinois State Academy of Science Transactions, v. 32, no. 2, p. 174-176 (also, 1940, Illinois Geological Survey Circular 60, p. 8-10). ------Fine-grained molding sand resources of northern Illinois, a preliminary investiga­ tion: Illinois Geological Survey Report of Investigations 57, 52 p. 1940 Pre-glacial River Ticona: Illinois State Academy of Science Transactions, v. 33, no. 2, p. 172-175 (also, 1941, Illinois Geology Survey Circular 68, p. 9-12). 1941 Mammoth found in Peorian Loess near Belleview, Illinois: American Journal of Science, v. 239, no. 6, p. 413-416 (also, Illinois Geological Survey Circular 66, 4 p.). ------Resistance of the Chicago area dolomites to freezing and thawing: Rock Products, v. 44, p. 49-52. 1942 Feldspar in Illinois sands—A study of resources: Illinois Geological Survey Report of Investigations 79, 87 p. ------(and Payne, J. N., with a contribution by Voskuil, W. H.) Geology and mineral resources of the Marseilles, Ottawa, and Streator Quadrangles: Illinois Geological Survey Bulletin 66, 388 p. MEMORIAL TO HAROLD BOWEN WILLMAN 61 1943 (and Payne, J. N.) Early Ordovician strata along Fox River in northern Illinois: Journal of Geology, v. 51, no. 8, p. 531-541 (also, Illinois Geological Survey Circular 100, 11 p.). ------High-purity dolomite in Illinois: Illinois Geological Survey Report of Investiga­ tions 90, 89 p. 1944 Resistance of Chicago area dolomites to freezing and thawing: Illinois Geological Survey Bulletin 68, p. 249-262. 1946 (and Reynolds, R. R., and Herbert, Paul, Jr.) Geological aspects of prospecting and areas for prospecting in the zinc-lead district of northwestern Illinois: Illinois Geological Survey Report of Investigations 116, 48 p. 1947 (and Reynolds, R. R.) Geological structure of the zinc-lead district of northwestern Illinois: Illinois Geological Survey Report of Investigations 124, 15 p. 1949 (and Workman, L. E., and Bell, A. H.) Guide to field study in southwestern Illinois between Cape Girardeau and St. Louis, Missouri, in Guidebook for 34th Annual Field Conference: American Association of Petroleum Geologists, p. 18-30. ------(with Leighton, M. M.) Late Cenozoic Valley: Itinerary, 2nd Biennial State Geologists Field Conference, Illinois Geological Survey, 86 p. 1950 (and Lowenstam, H. A., and Workman, L. E.) Field conference on Niagaran reefs in the Chicago region: American Association of Petroleum Geologists, 35th Annual Convention, Chicago, Illinois: Illinois Geological Survey Guidebook Series 1, 23 p. ------(with Leighton, M. M.) Loess formations of the Mississippi Valley: Journal of Geology, v. 58, no. 6, p. 599-623 (also, Illinois Geological Survey Report of Investigations 149, 27 p.). 1951 (and Templeton, J. S.) Cambrian and lower Ordovician exposures in northern Illinois: Illinois State Academy of Science Transactions, v. 44, p. 109-125 (also, 1952, Illinois Geological Survey Circular 179, p. 109-125). 1952 (with Templeton, J. S.) Central northern Illinois, in Tri-state Geological Society 16th Annual Field Conference, Dixon, Illinois: Illinois Geological Survey Guidebook Series 2, 47 p. 1953 (with Leighton, M. M.) Basis of subdivisions of Wisconsin glacial stage in north­ eastern Illinois, in Guidebook for the 4th Biennial State Geologists Field Conference, Pt. 1: Illinois Geological Survey and Indiana Geological Survey, p. 1-73. 1954 (with Collinson, C. W., and Swann, D. H.) Guide to the structure and stratigraphy along the Lincoln Fold in western Illinois, in American Association of Petroleum Geologists, 35th Annual Convention, St. Louis, Missouri: Illinois Geological Survey Guidebook Series 3, 75 p. 1955 (with Ekblaw, G. E.) Farmdale Drift near Danville, Illinois: Illinois Academy of Science Transactions, v. 47, p. 129-138. ------(with Heyl, A. V., Jr., Lyons, E. J., Agnew, A. F ., and Behre, C. H., Jr., with information on Illinois supplied by Willman, H. B., and Reynolds, R. R.) Zinc-lead- copper resources and general geology of the Upper Mississippi Valley district: U.S. Geological Survey Bulletin 1015-G, p. iii, 227-245. ------(with Lamar, J. E.) Illinois building stones: Illinois Geological Survey Report of Investigations 184, 25 p. 1956 (with Lamar, J. E., Machin, J. S., and Voskuil, W. H.) Preliminary report on portland cement materials in Illinois: Illinois Geological Survey Report of Investigations 195, 34 p. 62 THE GEOLOGICAL SOCIETY OF AMERICA ------(with Lowenstam, H. A., and Swann, D. H.) The Niagaran reef at Thornton, Illinois, in American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists Annual Convention, Chicago, Illinois: Illinois Geological Survey Guidebook Series 4, 19 p. 1958 (with Frye, J. C.) Permafrost features near the Wisconsinan glacial margin in Illinois: American Journal of Science, v. 256, p. 518-524. ------(and Swann, D. H., and Frye, J. C.) Stratigraphic policy of the Illinois State Geological Survey: Illinois Geological Survey Circular 249, 14 p. ------(and Frye, J. C.) Problems of Pleistocene geology in the greater St. Louis area: Geological Society of America Guidebook, St. Louis Meeting, 2nd Field Trip, p. 9-19. ------(with Lamar, J. E.) Origin of Illinois sand and gravel deposits: Illinois Geological Survey Industrial Minerals Notes 8, 9 p. 1959 (with Flint, R. F., Colton, R. B., and Goldthwait, R. P.) Glacial map of the United States east of the Rocky Mountains: Geological Society of America. ------(with MacClintock, Paul) Geology of Buda Quadrangle, Illinois: Illinois Geological Survey Circular 275, 29 p. 1960 (with Frye, J. C., Shaffer, R. R., and Ekblaw, G. E.) Accretion-gley and the gumbotil dilemma: American Journal of Science, v. 258, p. 185-190. ------(with Frye, J. C.) Classification of the Wisconsinan Stage in the Lake glacial lobe: Illinois Geological Survey Circular 285, 16 p. ------(with Frye, J. C., and Glass, H. D.) Gumbotil, accretion-gley, and weathering profile: Illinois Geological Survey Circular 295, 39 p. ------(with Kosanke, R. M., Simon, J. A., and Wanless, H. R.) Classification of the Pennsylvanian strata of Illinois: Illinois Geological Survey Report of Investiga­ tions 214, 84 p. 1961 (with Frye, J. C.) Continental glaciation in relation to McFarlan’s sea-level curves for Louisiana: Geological Society of America Bulletin, v. 72, p. 991-992. ------(with Swann, D. H.) Megagroups in Illinois: American Association of Petroleum Geologists Bulletin, v. 45, p. 471-483. ------(with Wier, C. E., and Gray, H. H.; Illinois part by Clegg, K. E., Doyle, F. L., Simon, J. A., and Willman, H. B.) Geologic map of the Indianapolis I o by 2° Quadrangle, Indiana and Illinois: Indiana Geological Survey. 1962 The Silurian strata of northeastern Illinois, and Description of stops second day, in Silurian rocks of the southern area, in Geological Society Annual Field Conference, p. 61-67, 81-96 (also, Illinois Geological Survey Reprint 1962-M, 8 p.) ------(with Frye, J. C., and Glass, H. D.) Stratigraphy and mineralogy of the Wisconsinan loesses of Illinois: Illinois Geological Survey Circular 334, 55 p. 1963 (and Glass, H. D., and Frye, J. C.) Mineralogy of glacial tills and their weathering profiles in Illinois, Pt. 1, Glacial tills: Illinois Geological Survey Circular 347, 55 p. ------(with Templeton, J. S.) Champlainian Series (Middle Ordovician) in Illinois: Illinois Geological Survey Bulletin 89, 260 p. ------(with Frye, J. C.) Development of Wisconsinan classification in Illinois related to radiocarbon chronology: Geological Society of America Bulletin, v. 74, p. 501-505. ------(with Frye, J. C., Glass, H. D., and Leonard, A. B.) Late Pleistocene loesses of midwestern United States of America: Lodz, Poland, Biuletyn Peryglacjalny, no. 12, p. 111-118 (also, Illinois Geological Survey reprint 1964-H, 8 p.). MEMORIAL TO HAROLD BOWEN WILLMAN 63 ------(with Frye, J. C.) Loess stratigraphy, Wisconsinan classification and accretion-gleys in central western Illinois, in Midwestern Section of Friends of the Pleistocene, 14th Annual Meeting, Urbana, Illinois: Illinois Geological Survey Guidebook Series 5, 37 p. 1964 (with Frye, J. C., and Glass, H. D.) Record of Mississippi River diversion in the Morton Loess of Illinois: Illinois Academy of Science Transactions, v. 57, p. 24-27. ------(with Glass, H. D., and Frye, J. C.) deposits and the Illinoisan glacial boundary in western Illinois: Illinois Geological Survey Circular 364, 28 p. 1965 (with Frye, J. C.) [Illinois part of] Guidebook for field conference C—Upper Mississippi Valley (Goldthwait, R. P., organizer; Schultz, C. B., and Smith, H.T.U., eds.,): International Association for Quaternary Research, 7th Congress, Nebraska Academy of Science, p. 81-110 (also, Illinois Geological Survey Reprint 1966-B, 41 p.) ------(with Frye, J. C.) Upper Mississippi Valley: Great Lakes-Ohio River Valley: Reprint of Illinois parts and supplemental data of guidebooks for Field Conferences C and G of the 7th Congress of the International Association for Quaternary Research, 1965: Illinois Geological Survey Reprint 1966-B, 147 p. ------(with Frye, J. C., and Black, R. F.) Outline of glacial geology of Illinois and Wisconsin, in Wright, H. E., Jr., and Frye, D. G., eds., The Quaternary of the United States: Princeton, New Jersey, 7th Congress of the International Association for Quaternary Research, p. 43-61 (also, Illinois Geological Survey Reprint 1965-N, 19 p.). 1966 (and Glass, H. D., and Frye, J. C.) Mineralogy of glacial tills and their weathering profiles in Illinois. Part II: Weathering profiles: Illinois Geological Survey Circular 400, 76 p. 1967 (and others, compilers) Geologic map of Illinois: Illinois Geological Survey, scale 1:500,000. 1968 (and Simon, J. A., Lynch, B. M., and Langenheim, V. A.) Bibliography and index of Illinois geology through 1965: Illinois Geological Survey Bulletin 92, 373 p. ------(with Frye, J. C., and Glass, H. D.) Correlation of midwestern loesses with the glacial succession, reprinted from Loess and related eolian deposits of the world, Proceedings of the 8th Congress of the International Association for Quaternary Research, Nebraska, 1965, v. 12, p. 3-21 (also, Illinois Geological Survey Reprint 1968-H). ------(with Frye, J. C., and Glass, H. D.) Mineral zonation of Woodfordian loesses of Illinois: Illinois Geological Survey Circular 427, 44 p. ------(with Frye, J. C., Rubin, M., and Black, R. F.) Definition of Wisconsinan Stage, reprinted from Contributions to stratigraphy: U.S. Geological Survey Bulletin 1274-E, p. E1-E22. ------(with Glass, H. D., and Frye, J. C.) Clay mineral composition, a source indicator of midwest loess, in The Quaternary of Illinois: University of Illinois College of Agriculture Special Publication 14, p. 35-40 (also, Illinois Geological Survey Reprint 1968-W). 1969 (with Frye, J. C., Glass, H. D., and Kempton, J. P.) Glacial tills of northwestern Illinois: Illinois Geological Survey Circular 437, 45 p. ------(and Frye, J. C.) High-level glacial outwash in the Driftless Area of northwestern Illinois: Illinois Geological Survey Circular 440, 43 p. 64 THE GEOLOGICAL SOCIETY OF AMERICA 1970 (and Frye, J. C.) Pleistocene stratigraphy of Illinois: Illinois Geological Survey Bulletin 94, 240 p. ------(with Frye, J. C.) Rock stratigraphy in the Illinois Pleistocene, reprinted from the 34th Annual Tri-state Field Conference Guidebook: De Kalb, Northern Illinois University, p. 60-64 (also, Illinois Geological Survey Reprint 1970-Q). 1971 Summary of the geology of the Chicago area: Illinois Geological Survey Circular 460, 77 p. ------(and Leonard, A. B., and Frye, J. C.) Farmdalian lake deposits and faunas in northern Illinois: Illinois Geological Survey Circular 467, 12 p. 1972 (with Frye, J. C., Leonard, A. B., and Glass, H. D.) Geology and paleontology of late Pleistocene Lake Saline, southeastern Illinois: Illinois Geological Survey Circular 471,44 p. 1973 Geology along the Illinois waterway: A basis for environmental planning: Illinois Geological Survey Circular 478, 48 p. ------Rock stratigraphy of the Silurian System in northeastern and northwestern Illinois: Illinois Geological Survey Circular 479, 55 p. ------(with Frye, J. C.) Wisconsinan climatic history interpreted from Lake Michigan Lobe deposits and soils: Geological Society of America Memoir 136, 135-152. 1974 (with Frye, J. C., Follmer, L. R., Glass, H. D., and Masters, J. M.) Earliest Wisconsinan sediments and soils: Illinois Geological Survey Circular 485, 12 p. ------(with Frye, J. C., Leonard, A. B., Glass, H. D., and Follmer, L. R.) The late Woodfordian Jules Soil and associated molluscan faunas: Illinois Geological Survey Circular 486, lip. ------Memorial to David H. Swann, 1915-1968: Geological Society of America Memorials v. Ill, p. 189-192 (also Illinois Geological Survey Reprint 1974-C). 1975 (and Smith, W. C.) Memorial to George E. Ekblaw, 1895-1972: Geological Society of America Memorials v. IV, p. 45-48 (also, Illinois Geological Survey Reprint 1974-U). ------(and Atherton, E., Buschbach, T. C., Collinson, C., Frye, J. C., Hopkins, M. E., Lineback, J. A., and Simon, J. A.) Handbook of Illinois stratigraphy: Illinois Geological Survey Bulletin 95, 261 p. 1978 (and Kolata, D. R.) The Platteville and Galena Groups in northern Illinois: Illinois Geological Survey Circular 502, 75 p. ------Memorial to James Marvin Weller, 1899-1976: Geological Society of America Memorials v. VIII, p. 1-12 (also, Illinois Geological Survey Reprint 1978-H). 1979 (with Lineback, J. A., Follmer, L. R., McKay, E. D., King, J. E., and Miller, N. G.) Wisconsinan, Sangamonian, and Illinoisan stratigraphy in central Illinois: 26th Field Conference of the Midwest Friends of the Pleistocene, May 4-6: Illinois Geological Survey Guidebook Series 13, 75 p. 1980 (and Frye, J. C.) The glacial boundary in southern Illinois: Illinois Geological Survey Circular 511, 23 p. 1982 Memorial to John Everts Lamar, 1897-1979: Geological Society of America Memorials v. XII, 7 p. (also, Illinois Geological Survey Reprint 1981-F). 1984 Memorial to John Chapman Frye, 1912-1982: Illinois State Academy of Science Transactions, v. 76, p. 165-179 (also, Illinois Geological Survey Reprint 1984-C). 1989 (and Glass, H. D., and Frye, J. C.) Glaciation and origin of the geest in the Driftless Area of northwestern Illinois: Illinois Geological Survey Circular 535, 44 p. Printed in U. S. A. 1/91