This photo of the Fox River Stone Company quarry near St. Charles,
Illinois, shows approximately 100 feet of glacial drift over bedrock.
Photo by A.K. Hansel.
ILLINOIS STATE GEOLOGICAL SURVEY
615 E. Peabody
Champaign, IL 61820
© 2012 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Geological Survey.