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.
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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.
Physical Description
20 p. : ill., maps ; 29 cm.
Notes
"Five lithologic subdivisions of the Pierre Shale in North Dakota correlated with equivalent rocks in central South Dakota, eastern Wyoming, central Montana, and southern Manitoba."
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Gill, James R. & Cobban, William Aubrey.Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain Areas, North Dakota,
report,
1965;
Washington D.C..
(https://digital.library.unt.edu/ark:/67531/metadc944628/:
accessed July 7, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.