Comparative facies formation in selected coal beds of the Powder River Basin
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Abstract
Petrologic studies of thick coal beds [Warwick, 1985; Moore, 1986; Moore and others, 1986; Moore and others, 1987; Warwick and Stanton, in press], which build on sedimentological interpretations [Flores, this volume] of associated units, provide data to interpret and contrast the varieties of peat formation in the Powder River Basin. Detailed analyses of the composition of coal beds lead to more complete interpretations regarding the depositional environment on a regional and local scale. Our efforts in the Powder River Basin [areas A-D in fig. 1 of Flores, this volume] have resulted in a series of site-specific studies that interpret the types of peat formation from the arrangement of different facies which comprise the coal beds and from the spatial form of the coal beds.
Our approach was to use a combination of megascopic criteria for facies sampling, and where only core was available, to analyze many interval samples to discriminate facies by their maceral composition. Coal beds in the Powder River Basin are composed of laterally continuous, compositional subunits of the bed (facies) that can be discerned most easily in weathered highwall exposures, less readily in fresh highwalls, and very poorly in fresh-cut core surfaces. In general, very low ash (
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Comparative facies formation in selected coal beds of the Powder River Basin |
| ISBN | 9780875905846 |
| DOI | 10.1029/FT132p0019 |
| Year Published | 1989 |
| Language | English |
| Publisher | American Geophysical Union |
| Description | 3 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Tertiary and Cretaceous coals in the Rocky Mountains region: Casper, Wyoming to Salt Lake City, Utah June 29-July 8, 1989 |
| First page | 19 |
| Last page | 21 |
| Country | United States |
| State | Montana, Wyoming |
| Other Geospatial | Powder River Basin |
| Google Analytic Metrics | Metrics page |