STATE OF ILLINOIS 



HON. DWIGHT H. GREEN, Governor 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



HON. FRANK G. THOMPSON, Director 



BOARD OF 

 NATURAL RESOURCES AND CONSERVATION 



HON. FRANK G. THOMPSON, Chairman 



EDSON S. BASTIN, Ph.D., Geology 

 WILLIAM A. NOYES, Ph.D., LL.D., Chem.D., 



D.Sc, Chemistry ^ 



LOUIS R. HOWSON, C.E., Engineering 



WILLIAM TRELEASE, D.Sc, LL.D., Biology 

 EZRA JACOB KRAUS, Ph.D., D.Sc, Forestry 

 ARTHUR CUTTS WILLARD, D.Engr., LL.D. 

 President of the University of Illinois 



STATE GEOLOGICAL SURVEY DIVISION 



Urbana 



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



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



JANE TITCOMB. M.A., Geological Assistant 



GEOLOGICAL RESOURCES 

 Coal 



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

 L. C. McCABE, Ph.D., Geologist (on leave) 

 R. J. HELFINSTINE, M.S., Assoc Mech. Eng. 

 JAMES M. SCHOPF, Ph.D., Asst. Geologist 

 J. NORMAN PAYNE, Ph:D., Asst. Geologist 

 CHARLES C. BOLEY, M.S., Asst. Mining Eng. 

 BRYAN PARKS, M.S., Asst. Geologist 



Industrial Minerals 



T. E. LAMAR, B.S., Geologist and Head 

 H. B. WILLMAN, Ph.D., Assoc Geologist 

 DOUGLAS F. STEVENS, M.E., Research Associate 

 ROBERT M. GROGAN. Ph.D., Asst. Geologist 

 ROBERT R. REYNOLDS, B.S., Research Assistant 



Oil and Gas 



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

 G. V. COHEE, Ph.D., Asst. Geologist 

 FREDERICK SQUIRES, B.S., Assoc Petr. Eng. 

 CHARLES W. CARTER, Ph.D., Asst. Geologist 

 WILLIAM H. EASTON, Ph.D., Asst. Geologist 

 PAUL G. LUCKHARDT, M.S., Research Assistant 

 WAYNE F. MEENTS, Research Assistant 



Areal and Engineering Geology 



GEORGE E. EKBLAW, Ph.D., Geologist and Head 

 RICHARD F. FISHER, M.S., Asst. Geologist 



Subsurface Geology 



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

 TRACY GILLETTE, Ph.D., Asst. Geologist 

 ARNOLD C. MASON, B.S., Asst. Geologist 

 KENNETH O. EMERY, Ph.D., Asst. Geologist 

 MERLYN B. BUHLE, M.S., Asst. Geologist 

 FRANK E. TIPPIE. B.S., Asst. Geologist 



Stratigraphy and Paleontology 



J. MARVIN WELLER, Ph.D., Geologist and Head 

 CHALMER L. COOPER, M.S., Assoc Geologist 



Petrography 



RALPH GRIM, Ph.D., Petrographer 

 RICHARDS A. ROWLAND, Ph.D., Asst. 

 Petrographer 



Physics 



R. J. PIERSOL, Ph.D., Physicist 



B. J. GREENWOOD, B.S.. Mech. Engineer 

 DONALD O. HOLLAND, M.S., Asst. Physicist 

 PAUL F. ELARDE, B.S., Asst. Physicist 

 DONALD W. HANEY. B.S., Research Assistant 



GEOCHEMISTRY 



FRANK H. REED, Ph.D., Chief Chemist 

 ROBERTA M. LANGENSTEIN, B.S.. Chemical 



Assistant 



Coal 



G. R. YOHE, Ph.D., Assoc. Chemist 

 MYRON H. WILT, B.S., Research Assistant 



Industrial Minerals 



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

 DELBERT L. HANNA, B.A., Research Assistant 



Fluorspar 



G. C. FINGER, Ph.D., Assoc. Chemist 

 EVERETT W. MAYNERT, B.S., Research Assistant 



X-ray and Spectrography 



W. F. BRADLEY, Ph.D., Assoc Chemist 



Analytical 



O. W. REES. Ph.D.. Chemist and Head 

 L. D. McVICKER, B.S., Asst. Chemist 

 P. W, HENLINE, M.S., Asst. Chemical Engineer 

 WILLIAM F. WAGNER, M.S., Asst. Chemist 

 K. F. BURSACK, B.A., Research Assistant 

 MARION LUND DICKMAN, B.S., Research 

 Assistant 



MINERAL ECONOMICS 



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

 GRACE N. OLIVER. A.B., Assistant in Mineral 

 Economics 



EDUCATIONAL EXTENSION 



DON L. CARROLL, B.S., Assoc Geologist 



PUBLICATIONS AND RECORDS 



GEORGE E. EKBLAW, Ph.D., Geologic Editor 

 CHALMER, L. COOPER, M.S., Geologic Editor 

 DOROTHY E. ROSE, B.S., Technical Editor 

 KATHRYN K. DEDMAN, M.A., Asst. Technical 



Editor 

 ALMA R. SWEENY, A.B., Technical Files Clerk 

 PORTIA ALLYN SMITH, Asst. Technical Files 



Clerk 

 RUTH E. ROTH, B.S., Asst. Technical Files Clerk 

 MEREDITH M. CALKINS. Geologic Draftsman 

 LESLIE D. VAUGHAN, Asst. Photographer 

 DOLORES THOMAS SIMS, B.A., Geologic Clerk 



Consultants: Ceramics, CULLEN W. PARMELEE, M.S, D.Sc, and RALPH K. HURSH, B.S., University of 

 Illinois: 



Pleistocene Invertebrate Paleontology, FRANK COLLINS BAKER, B.S. 

 Mechanical Engineering, SEICHI KONZO, M.S., University of Illinois, 



University of Illinois; 



Topographic Mapping in Cooperation with the United States Geological Survey. 

 This Report is a Contribution of the Division of Stratigraphy and Paleontology. 



October 1, 1941 



