Wikipedia
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 edit
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.
See also edit
References edit
- ^ Thomas Brennan Nolan; C. W. Merriam; James S. Williams (1956). "The stratigraphic section in the vicinity of Eureka, Nevada" (PDF). Geological Survey Professional Paper. 276: 24. doi:10.3133/PP276. ISSN 0096-0446. Wikidata Q64862615.
- ^ a b Clarence King (1878). "Systematic Geology" (PDF). 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.