- Alfred Hannam Bell, John Everts Lamar, Walter Henry Voskuil, Daniel Jerome Fisher, Fay VaNisle Tooley, George Elbert Ekblaw, George Vincent Cohee, Gilbert Haven Cady, Glenn Charles Finger, Illinois State Geological Survey, James Morton Schopf, John Rice Ball, L. C. McCabe, L. D. McVicker, Lewis E. Workman, William Albert Newton, Frank H. Reed, G. N. Oliver, H. B. Willman, R. J. Piersol
· 1932
- Allen Francis Agnew, Carl Andrew Bays, Frederick Squires, Glenn Charles Finger, Harold Bowen Willman, Illinois State Geological Survey, James Marvin Weller, James Norman Payne, John Everts Lamar, Joseph F. Booton, Leland Horberg, Morris Morgan Leighton, Walter Henry Voskuil, Douglas Franklin Stevens, Alfred Hannam Bell, Don Carroll, Frank Hynes Reed, Gilbert Haven Cady, Kenneth Orris Emery, Mathew L. Kalinowski, Stewart Huntley Folk
· 1944
- David Henry Swann, Donald Lee Graf, Douglas A. Block, Emile Desire Pierron, Glenn Charles Finger, Harold Wesley Jackman, James Mansfield Cleary, James Watson Baxter, John Albert Harrison, John Chapman Frye, Richard Charles Anderson, Thomas William Smoot, Walter Edward Parham, Walter Rose, Walter Voskuil, Wayne Franklin Meents, William Arthur White, Willis L. Busch, Harold Bowen Willman, Herbert David Glass, Orin Wainwright Rees
· 1959
- Henry Phillip Ehrlinger, Richard David Harvey, Ira Edgar Odom, James C. Bradbury, James C. Cobb, John Everts Lamar, M. E. Hopkins, Norman C. Hester, Ramesh Malhotra, Robert L. Major, Willis L. Busch, Bruce Forbes Bohor, Gordon S. Fraser, H. W. Jackman, Jack Aaron Simon, John M. Masters, Joseph Jerushalmi, Glenn Charles Finger, James Watson Baxter
· 1972