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New Cretaceous Formations in the Western Wyoming Thrust Belt
A report about six cretaceous rock formations in the western Wyoming thrust belt.
Date:
1973
Creator:
Rubey, William W.
System:
The UNT Digital Library
Stratigraphy and Geologic History of the Montana Group and Equivalent Rocks, Montana, Wyoming, and North and South Dakota
From introduction: This is a progress report on regional stratigraphic and paleontologic studies of the Upper Cretaceous Montana Group and equivalent rocks in the northern part of the western interior of the United States. It presents preliminary data on the positions of strandlines during a 14-m.y. (million year) span of the Late Cretaceous as well as our interpretations of the geologic history of this period.
Date:
1973
Creator:
Gill, James R. & Cobban, William Aubrey
System:
The UNT Digital Library