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GEOREF RECORD

Frontier-Niobrara contact in Laramie Basin, Wyoming

Horace Davis Thomas
Frontier-Niobrara contact in Laramie Basin, Wyoming
Bulletin of the American Association of Petroleum Geologists (September 1936) 20 (9): 1189-1197

Abstract

The Upper Cretaceous shale which has been called Carlile in the Laramie Basin, Wyoming, overlies the Frontier formation and is, in turn, overlain by the chalky beds of the Niobrara. The fauna of the upper part of the Frontier is of the same age as that of the upper type Carlile of Colorado, whereas the fauna of the "Carlile" of the Laramie Basin is of Niobrara age. It is believed, therefore, that the use of the name, Carlile, should be discontinued in the Laramie Basin and the name, Niobrara, extended downward to embrace the beds erroneously called Carlile. This basal Niobrara shale is correlated with the Sage Breaks shale member of the Niobrara of the Black Hills, and the name, Sage Breaks, is here substituted for the abandoned name, Carlile.


ISSN: 0883-9247
Serial Title: Bulletin of the American Association of Petroleum Geologists
Serial Volume: 20
Serial Issue: 9
Title: Frontier-Niobrara contact in Laramie Basin, Wyoming
Pages: 1189-1197
Published: 193609
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
Accession Number: 1939-019103
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 1 fig.
N41°00'00" - N45°00'00", W111°04'60" - W104°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1939
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