Pogonip Group
Geologic group in the western U.S.
From Wikipedia, the free encyclopedia
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.
