Guide to the
GEOLOGIC MAP OF ILLINOIS
Illinois State Geological Survey
Educational Series 7
STATE of ILLINOIS
Otto Kerner, Governor
DEPARTMENT of REGISTRATION and EDUCATION
William Sylvester White, Director
1961
ILLINOIS STATE GEOLOGICAL SURVEY
John C. Frye, Chief
URBANA, ILLINOIS
PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS
42517-20M 2 (78783)