Pogonip Group
The Pogonip Group is an Ordovician period[3] geologic group located in southern Nevada and in Utah.
| Pogonip Group Stratigraphic range: Early Ordovician stage Ordovician period | |
|---|---|
| Type | Geologic group |
| Sub-units | Antelope Valley Limestone Ninemile Formation Goodwin Limestone[1] |
| Underlies | Copenhagen Formation |
| Overlies | Windfall Formation |
| Location | |
| Region | Nevada Utah |
| Country | United States |
| Type section | |
| Named for | Pogonip Ridge, White Pine County, Nevada[2] |
| Named by | Clarence King[2] |
Geology
Its subunits in Nevada, from youngest/later to oldest/earlier, are:
- Goodwin Limestone — 1,800 metres (5,900 ft) thick
- Ninemile Formation — 550 metres (1,800 ft) thick
- Antelope Valley Limestone — 1,100 metres (3,600 ft) thick
It preserves fossils dating back to the Early Ordovician stage of the Ordovician period.
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See also
References
- Thomas Brennan Nolan; Charles Warren Merriam; James Steele Williams (1956), "The stratigraphic section in the vicinity of Eureka, Nevada", Professional Paper, 276: 24, doi:10.3133/PP276, Wikidata Q64862615
- Clarence King (1878), "Systematic Geology", Report of the Geological exploration of the fortieth parallel, 1: 188, doi:10.3133/70038097, Wikidata Q65972682
- Lehi F. Hintze; Myron G. Best (1987), "Geologic map of the Mountain Home Pass and Miller Wash quadrangles, Millard and Beaver counties, Utah, and Lincoln County, Nevada", Miscellaneous Field Studies Map, doi:10.3133/MF1950, Wikidata Q57850447
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