Clear Lake QuadrangleError processing SSI file
Please note: There is a very small piece of the Clear Lake quad in Schuyler County. You may choose not to order this quad if Schuyler County is the area of interest.
County: Cass, Mason, Schuyler
Current Date: 1981
Photo Revision Date:
Archive Date: 1981
Ordering information for Illinois State Geological Survey Publications
Updated 01/05/2010 SLD