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 series of mines from Morris to Braidwood and south to Essex. Immediates S. of Confluence of Illinois and Kankakee Rivers 55-65 mi. SW of Chicago, North America, United States, Illinois, Grundy County