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Pennsylvanian System in Central and Northern Rocky Mountains1

By
J. Stewart Williams
J. Stewart Williams
Logan, Utah
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Published:
January 01, 1962

Abstract

An attempt is made to review and present in summary the stratigraphy of the Pennsylvanian System in the central and northern Rocky Mountains. The area considered extends from southwestern Montana southeastward into Colorado, eastward to the Black Hills and westward into northeastern Utah. After a general evaluation of studies to the present, and a brief review of pre-Pennsylvanian paleogeology and the structure of the system, principal formations are presented with a definition, a description of lithology, and a statement of age and paleogeography. Formations of lesser extent, and marginal to the area, are given smaller treatment. The presentation is summarized in 11 figures including a paleogeologic map, 5 maps showing paleogeography and lithofacies, 3 isopach maps, and 2 correlation charts.

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Contents

AAPG Special Publication

Pennsylvanian System in the United States

Carl C. Branson
Carl C. Branson
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American Association of Petroleum Geologists
ISBN electronic:
9781629812373
Publication date:
January 01, 1962

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