Serial/Series Title
Country
States
Decade
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
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
Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain Areas, North Dakota
From abstract: Reconnaissance examination of widely scattered outcrops of Upper Cretaceous rocks in the heavily glaciated areas of eastern North Dakota provides the basis for the first formal subdivision of the Pierre Shale in these areas.
Date:
1965
Creator:
Gill, James R. & Cobban, William Aubrey
System:
The UNT Digital Library