| Forbes Shale | |
|---|---|
| Stratigraphic range: Coniacian ~ | |
| Type | Formation |
| Unit of | Asuncion Group |
| Underlies | Kione Sands |
| Overlies | Funks Shale |
| Thickness | 1,300 ft (400 m) |
| Lithology | |
| Primary | Shale |
| Location | |
| Coordinates | 38°36′N122°00′W / 38.6°N 122.0°W |
| Approximate paleocoordinates | 42°48′N86°30′W / 42.8°N 86.5°W |
| Region | California |
| Country | United States |
| Extent | Sacramento Valley |
  Forbes Shale (the United States)  Forbes Shale (California) | |
The Forbes Shale is a geologic formation in the Sacramento Valley of northern California, United States. It is found in the Sutter Buttes area of Sutter County, California. It preserves fossils dating back to the Coniacian stage of the Late Cretaceous period. [1]