Subject: Formations (Geology) / Spatial Coverage: Powder River Basin (Wyo. and Mont.) - Yale University Library GeoBlacklight Search Results

Start Over Subject Formations (Geology) Spatial Coverage Powder River Basin (Wyo. and Mont.)

1. Preliminary charts of selected structure & thickness maps and diagrams from the Powder River Basin, Wyoming & Montana [cartographic material]

1986. 2023-10-27T18:18:10Z. 2023-10-28T03:02:26Z. Geological Survey (U.S.). The Survey : [Books and Open-file Reports Section, distributor]. English. cartographic image. Public. Powder River Basin (Wyo. and Mont.), United States, and Powder River Basin.

2. Thickness of upper Cretaceous rocks from the base of the Niobrara Formation to the top of the Frontier Formation, including the Carlile shale, Greenhorn Formation, and Sage Breaks 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.