Williams Fork Formation
| Williams Fork Formation | |
|---|---|
| Stratigraphic range: Campanian (Edmontonian) ~ | |
| Type | Geological formation |
| Unit of | Mesaverde Group |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone |
| Location | |
| Coordinates | 40°00′N 108°48′W / 40.0°N 108.8°W |
| Approximate paleocoordinates | 47°30′N 80°18′W / 47.5°N 80.3°W |
| Region | Colorado |
| Country | United States |
%22%3E%3Ctext%20x%3D%2250%25%22%20y%3D%2250%25%22%20text-anchor%3D%22middle%22%20dominant-baseline%3D%22middle%22%20fill%3D%22%2354595d%22%20font-size%3D%2216%22%20font-family%3D%22sans-serif%22%3EWilliams%20Fork%20Formation%20is%20located%20in%20the%20United%20States%3C%2Ftext%3E%3C%2Fg%3E%3C%2Fsvg%3E)  Williams Fork Formation (the United States) %22%3E%3Ctext%20x%3D%2250%25%22%20y%3D%2250%25%22%20text-anchor%3D%22middle%22%20dominant-baseline%3D%22middle%22%20fill%3D%22%2354595d%22%20font-size%3D%2216%22%20font-family%3D%22sans-serif%22%3EWilliams%20Fork%20Formation%20is%20located%20in%20Colorado%3C%2Ftext%3E%3C%2Fg%3E%3C%2Fsvg%3E) Williams Fork Formation (Colorado) | |
The Williams Fork Formation (WFF) is a geologic formation located in northwestern Colorado that is a member of the Mesaverde group. The formation was located on the eastern coast of Laramidia and was deposited by a fluvio-deltaic environment during the Campanian/Maastrichtian (Edmontonian) boundary.