Author: Geological Survey (U.S.) / Temporal Coverage: Pennsylvanian - Yale University Library GeoBlacklight Search Results

1. Isopach map of the interval from surface elevation to the top of the Pennsylvanian and Permian Minnelusa Formation and equivalents, Powder River Basin, Wyoming and Montana

1990. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Powder River Watershed (Wyo. and Mont.). Pennsylvanian and Permian.

2. Map showing contours on the top of the Pennsylvanian and Permian Minnelusa Formation and equivalents, Powder River Basin, Wyoming and Montana

1990. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Powder River Watershed (Wyo. and Mont.). Pennsylvanian and Permian.

3. Structure-contour maps of the Powder River basin, Montana and Wyoming

1996. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by U.S.G.S. Information Services. English. Public. Powder River Watershed (Wyo. and Mont.). Cretaceous, Jurassic, Pennsylvanian, Permian, and Triassic.

4. The lower Pennsylvanian unconformity in the central Appalachian Basin [cartographic material]

1999. 2002-06-01T04:00:00Z. 2016-07-16T21:16:14Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. cartographic image. Public. Appalachian Basin, United States, and Appalachian Basin. Pennsylvanian and From 280 to 310 million years ago.