Des Plaines Disturbance, Illinois    

Cochise College
Virtual Geology Museum    USA Geology Maps   
Educational Resources
Geology Home Page                                   

Roger Weller, geology instructor

wellerr@cochise.edu

 
Original map is the Geologic Map of the United States
United States Geological Survey
edited by P.B. King and H.M. Beikman, 1974
original scale was 1: 2,500,000
 

 
The same geologic map, but with the culture removed