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- Geographic Subject: Indiana10
- Topical Subject: Geology10
- Topical Subject: Geology, Stratigraphic8
- Geographic Subject: Illinois4
- Geographic Subject: Ohio3
- Geographic Subject: Michigan2
- Topical Subject: Mines and mineral resources2
- Geographic Subject: Calumet Region (Ill. and Ind.)1
- Geographic Subject: Gibson County (Ind.)1
- Geographic Subject: Indiana, Northwest1
- Geographic Subject: Knox County (Ind.)1
- Topical Subject: IGS Annual Reports1
- Topical Subject: Sediments (Geology)1