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You searched for: Date Created 1970 Remove constraint Date Created: 1970 Holding Location B-WELLS Remove constraint Holding Location: B-WELLS Subject Geographic Subject: Michigan Remove constraint Subject: Geographic Subject: Michigan Subject Topical Subject: Geology Remove constraint Subject: Topical Subject: Geology

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  • Geological map of the 1¬¨‚àû x 2¬¨‚àû Chicago Quadrangle, Indiana, Illinois, and Michigan, showing bedrock and unconsolidated deposits