US Great Lakes (MN, WI, IL, IN, OH, MI) Search this
Object Type:
Education and Outreach collections
Collecting Locality:
Mazon Creek area running along a string of mines from Morris to Bradwood and south to Essex. Immediately south of the confluence of the Illinois and Kankakee Rivers, 55-65 miles south of Chicago., North America, United States, Illinois, Grundy County