Velda A. 

 Helen E. 



Millard, 

 McMorri 



SCIENTIFIC AND TECHNICAL STAFF OF THE 

 STATE GEOLOGICAL SURVEY DIVISION 



100 Natural Resources Building, Urbana 

 M. M. LEIGHTON, Ph.D., Chief 

 ENID TOWNLEY, M.S., Assistant to the Chief 

 Junior Asst. to the Chief Elizabeth Stephens, B.S., Geological Assistant 



Secretary to the Chief 



Berenice Reed, Supervisory Technical Assistant 



GEOLOGICAL RESOURCES 



Arthur Bevan, Ph.D., D.Sc, Principal Geologist 



Coal 



G. H. Cady, Ph.D., Senior Geologist and Head 

 R. J. Helfinstine, M.S., Mechanical Engineer 

 George M. Wilson, M.S., Geologist 

 Robert M. Kosanke, M.A., Associate Geologist 

 John A. Harrison, M.S., Assistant Geologist 

 Jack A. Simon, M.S., Assistant Geologist 

 Raymond Siever, M.S., Assistant Geologist 

 Mary Barnes Rolley, M.S., Assistant Geologist 

 Margaret A. Parker, B.S., Assistant Geologist 

 Kenneth E. Clegg, Technical Assistant 



Oil and Gas 



A. H. Bell, Ph.D., Geologist and Head 

 Frederick Squires, A.B., B.S., Petroleum Engineer 

 David H. Swann, Ph.D., Geologist 

 Virginia Kline, Ph.D., Associate Geologist 

 Wayne F. Meents, Assistant Geologist 

 Richard J. Cassin, M.S., Assistant Petroleum En- 

 gineer 

 Lester W. Clutter, B.S., Research Assistant 



Industrial Minerals 



J. E. Lamar, B.S., Geologist and Head 

 Robert M. Grogan, Ph.D., Geologist 

 Donald L. Graf, M.A., Associate Geologist 

 James C. Bradbury, M.A., Assistant Geologist 

 Raymond S. Shrode, B.S., Assistant Geologist 



Clay Resources and Clay Mineral Technology 



Ralph E. Grim, Ph.D., Petrographer and Head 

 William A. White, M.S., Associate Geologist 

 Herbert D. Glass, M.A., Associate Geologist 

 William Johns, B.A., Special Research Assistant 



Groundwater Geology and Geophysical 

 Exploration 



Arthur Bevan, Ph.D., D.Sc, Acting Head 

 Merlyn B. Buhle, M.S., Associate Geologist 

 M. W. Pullen, Jr., M.S., Associate Geologist 

 Richard F. Fisher, M.S., Assistant Geologist 

 Margaret J. Castle, Assistant Geologic Draftsman 

 Robert D. Knodle, M.S., Assistant Geologist 

 John W. Foster, B.A., Assistant Geologist 



Engineering Geology and Topographic Mapping 

 George E. Ekblaw, Ph.D., Geologist and Head 



Areal Geology and Paleontology 



H. B. Willman, Ph.D., Geologist and Head 

 J. S. Templeton, Ph.D., Geologist 



Subsurface Geology 



L. E. Workman, M.S., Geologist and Head 

 Elwood Atherton, Ph.D., Associate Geologist 

 Donald B. Saxby, M.S., Assistant Geologist 

 Robert C. McDonald, B.S., Research Assistant 

 Lois E. Titus, B.S., Research Assistant 



Mineral Resource Records 



Vivian Gordon, Head 



Harriet C. Daniels, B.A., Technical Assistant 

 Dorothy Gore, B.S., Research Assistant 

 Dorothy A. Foutch, Technical Assistant 

 Zora M. Kaminsky, B.E., Technical Assistant 

 Elene L. Roberts, Technical Assistant 

 Janice J. Corrigan, B.A., Technical Assistant 



Ruth Bickell, Technical Assistant 

 Jane Teller, A.B., Technical Assistant 



GEOCHEMISTRY 



Frank H. Reed, Ph.D., Chief Chemist 

 Grace C. Johnson, B.S., Research Assistant 



Coal 



G. R. Yohe, Ph.D., Chemist and Head 

 Donald R. Hill, B.S., Research Assistant 

 Joseph E. Dunbar, B.S., Research Assistant 



Industrial Minerals 



J. S. Machin, Ph.D., Chemist and Head 

 Tin Boo Yee, M.S., Assistant Chemist 

 Paulene Ekman, B.A., Research Assistant 

 Grace C. Moulton, M.S., Research Assistant 



Fluorspar 



G. C. Finger, Ph.D., Chemist and Head 

 Robert E. Oesterling, B.A., Special Research 



Assistant 

 James L. Finnerty, B.S., Special Research Assistant 



Chemical Engineering 



H. W. Jackman, M.S.E., Chemical Engineer and 



Head 

 P. W. Henline, M.S., Chemical Engineer 

 B. J. Greenwood, B.S., Mechanical Engineer 

 James C. McCullough, Research Associate 



X-Ray and Spectrography 



W. F. Bradley, Ph.D., Chemist and Head 



Physics 



Kenneth B. Thomson, Ph.D., Physicist 

 R. J. Piersol, Ph.D., Physicist Emeritus 

 Janice Helen Howard, B.S., Research Assistant 



Analytical Chemistry 



O. W. Rees, Ph.D., Chemist and Head 

 L. D. McVicker, B.S., Chemist 

 Howard S. Clark, A.B., Associate Chemist 

 Emile D. Pierron, M.S., Assistant Chemist 

 William F. Loranger, B.A., Research Assistant 

 Annabelle G. Elliott, B.S., Technical Assistant 

 Alice M. Helmuth, B.S., Research Assistant 

 Ruth E. Koski, B.S., Research Assistant 

 Charles T. Allbright, B.S., Research Assistant 



MINERAL ECONOMICS 



W. H. Voskuil, Ph.D., Mineral Economist 

 W. L. Busch, Assistant Mineral Economist 

 Nina Hamrick, A.M., Assistant Mineral Economist 

 Ethel M. King, Research Assistant 



EDUCATIONAL EXTENSION 



Gilbert O. Raasch, Ph.D., Associate Geologist 



in Charge 

 Margaret Ann Hayes, B.S., Research Assistant 



LIBRARY 



Anne E. Kovanda, B.S., B.L.S., Librarian 

 Ruby D. Frison, Technical Assistant 

 Marjorie Roepke, B.S., Technical Assistant 



PUBLICATIONS 



Dorothy E. Rose, B.S., Technical Editor 

 M. Elizabeth Staaks, B.S., Assistant Editor 

 Meredith M. Calkins, Geologic Draftsman 

 Ardis D. Pye, Assistant Geologic Draftsman 

 Wayne W. Nofftz, Technical Assistant 

 Leslie D. Vaughan, Associate Photographer 

 Beulah M. Unfer, Technical Assistant 



Consultants: Geology, George W. White, Ph.D., University of Illinois 

 Ceramics, Ralph K. Hursh, B.S., University of Illinois 

 Mechanical Engineering, Seichi Konzo, M.S., University of Illinois 



Topographic Mapping in Cooperation with the United States Geological Survey, 



This report is a contribution of the Coal Division. 



August 1, 1949 



