Willwood Formation
The Willwood Formation is a sedimentary sequence deposited during the late Paleocene to early Eocene, or Clarkforkian, Wasatchian and Bridgerian in the NALMA classification.
| Willwood Formation | |
|---|---|
| Stratigraphic range: Thanetian-Ypresian (Clarkforkian-Bridgerian) ~ | |
| Type | Geological formation |
| Sub-units | Gray Bull beds, Sand Coulee beds, Sand Creek Facies, Wa-1 Zone |
| Lithology | |
| Primary | Mudstone, shale |
| Other | Sandstone, conglomerate |
| Location | |
| Coordinates | 44.5°N 108.0°W |
| Approximate paleocoordinates | 49.2°N 90.8°W |
| Region | Wyoming |
| Country | USA |
| Extent | Bighorn Basin |
| Type section | |
| Named for | Shale, mudstone, limestone |
Willwood Formation (the United States) Willwood Formation (Wyoming) | |
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