by: Robert H. Shaver, Curtis H. Ault, Ann M. Burger, Donald D. Carr, John B. Droste, Donald L. Eggert, Henry H. Gray, Denver Harper, Nancy R. Hasenmueller, Walter A. Hasenmueller, Alan S. Horowitz, Harold C. Hutchison, Brian D. Keith, Stanley J. Keller, John B. Patton, Carl B. Rexroad, and Charles E. Wier
Hypertext file
by Todd A. Thompson and Zinta Smidchens
Modified from
INDIANA GEOLOGICAL SURVEY BULLETIN 59