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] - Yale University Library GeoBlacklight

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]

Author:: Geological Survey (U.S.)
Publisher:: The Survey
Subject:: Geology, Stratigraphic
Petrology
Formations (Geology)
Spatial Coverage:: Powder River Basin (Wyo. and Mont.)
Temporal Coverage:: Cretaceous
Language:: English
Year:: 1987
Date Issued:: 2002-06-01T04:00:00Z
Date Modified:: 2002-06-01T04:00:00Z
Library Catalog Record:: https://search.library.yale.edu/catalog/5078167
Digital Collections Record:: No Digital Collections record

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