Evolution of fluvial styles in the Eocene Wasatch Formation, Powder River Basin, Wyoming
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Abstract
Vertical and lateral facies changes in the lower part of the Eocene Wasatch Formation in the Powder River Basin, Wyoming represent an evolution of fluvial systems that varied from meandering to anastomosing. The meandering facies in the lower part of the study interval formed in a series of broad meanderbelts in a northnorthwestflowing system. Upon abandonment this meanderbelt facies served as a topographic high on which a raised or ombrotrophic Felix peat swamp developed. Peat accumulated until compaction permitted encroachment of crevasse splays from an adjoining transitional facies which consists of deposits of a slightly sinuous fluvial system. Crevasse splays eventually prograded over the peat swamp that was partly covered by lakes. Bifurcation, reunification, and transformation of crevasse channels into major conduits produced an anastomosing system that was characterized by diverging and converging channels separated by floodbasins drowned by lakes and partly covered swamps.
| Publication type | Book chapter |
|---|---|
| Publication Subtype | Book Chapter |
| Title | Evolution of fluvial styles in the Eocene Wasatch Formation, Powder River Basin, Wyoming |
| DOI | 10.2110/pec.87.39.0303 |
| Year Published | 1987 |
| Language | English |
| Publisher | Society of Economic Paleontology and Mineralogy |
| Description | 8 p. |
| Larger Work Type | Book |
| Larger Work Title | Recent developments in fluvial sedimentology |
| First page | 303 |
| Last page | 310 |
| Country | United States |
| State | Wyoming |
| Other Geospatial | Powder River Basin |
| Google Analytic Metrics | Metrics page |