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You searched for: Access Public Subject Geology, Stratigraphic Subject Formations (Geology) Data type Mixed

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1. Regional stratigraphy and petroleum systems of the Illinois Basin, U.S.A.

Swezey, C. (Christopher). U.S. Dept. of the Interior, U.S. Geological Survey ;.

2. Regional stratigraphy and petroleum systems of the Michigan Basin, North America

Swezey, C. (Christopher). U.S. Geological Survey ;.

3. The Maquoketa Formation (Upper Ordovician) in Iowa

Parker, Mary Combs. Iowa Geological Survey,.