Pysht Formation
| Pysht Formation | |
|---|---|
| Stratigraphic range: Late Oligocene, | |
Fossil Callianopsis from the Pysht Formation | |
| Type | Geological formation |
| Unit of | Twin River Group |
| Underlies | Clallam Formation |
| Overlies | Makah Formation |
| Lithology | |
| Primary | Siltstone, mudstone, conglomerate |
| Location | |
| Coordinates | 48°12′N 123°54′W / 48.2°N 123.9°W |
| Approximate paleocoordinates | 47°48′N 114°54′W / 47.8°N 114.9°W |
| Region | Washington |
| Country | United States |
| Type section | |
| Named for | Pysht River |
The Pysht Formation is a geologic formation in Washington (state). It preserves fossils dating back to the Paleogene period, which appear to have been deposited in an offshore marine environment. Outcrops are present on the northern Olympic Peninsula, in Clallam County.