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Altered volcanic ash partings in Wasatch Formation coal beds of the northern Powder River basin: composition and geologic applications

Open-File Report 79-1203

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Abstract

In contrast to the coal-bearing rocks of the Appalachian and Eastern Interior Basins, those of the northern Powder River Basin exhibit more complex stratigraphic and facies relationships, and regional correlations of coal beds are, therefore, more difficult to establish. Recently, however, several coal beds in the Powder River Basin, as well as coal beds in several other coal basins of the Rocky Mountain region, have been found to contain thin but persist·ent layers. of altered volcanic ash described as kaolinitic bentonites (Bohor, 1976, 1977, 1978, Bohor and others, 1976, 1978, Bohor and Pillmore, 1976). These layers serve as isochronous marker horizons which aid in correlating coal beds over broad areas.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Altered volcanic ash partings in Wasatch Formation coal beds of the northern Powder River basin: composition and geologic applications
Series title:
Open-File Report
Series number:
79-1203
Year Published:
1979
Language:
English
Publisher:
U.S. Geological Survey
Description:
45 p.
Country:
United States
State:
Wyoming
Other Geospatial:
Powder River Basin
Online Only (Y/N):
N
Additional Online Files (Y/N):
N