Powell Formation
The Powell Formation or Powell Dolomite is a geologic formation in northern Arkansas, southeast Missouri[3] and Virginia. It contains gastropod, cephalopod, and trilobite fossils dating back to the Ordovician Period.[3]
| Powell Formation Stratigraphic range: Ordovician | |
|---|---|
| Type | Formation |
| Underlies | Everton Formation |
| Overlies | Cotter Formation[1] |
| Lithology | |
| Primary | Dolomite |
| Other | Shale, sandstone, chert |
| Location | |
| Region | Arkansas, Missouri and Virginia |
| Country | United States |
| Type section | |
| Named for | Powell railroad station (now abandoned), Marion County, Arkansas[2] |
| Named by | Edward Oscar Ulrich |
See also
References
- Thompson, Thomas L., 2001, Lexicon of Stratigraphic Nomenclature in Missouri, Missouri Department of Natural Resources, Division of Geology and Land Survey, Report of Investigation Number 73, p 230
- Purdue, A.H.; Miser, H.D. (1916). "Description of the Eureka Springs and Harrison quadrangles". U.S. Geological Survey Geologic Atlas of the United States. 202: 2, 4, 5, 6, 7, 9, 16, 17, 18, 20, 21.
- "Powell Dolomite/Formation". Archived from the original on 2014-07-14. Retrieved 2014-07-11.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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