Subject: Shale - Yale University Library GeoBlacklight Search Results

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11. Thickness of Teckla sandstone member of the upper Cretaceous Lewis shale, Powder River Basin, Wyoming and Montana

1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.

12. Thickness of upper Cretaceous Lewis Shale, Powder River Basin, Wyoming and Montana [microform]

1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.