Forbes Shale facts for kids
Quick facts for kids Forbes ShaleStratigraphic range: Coniacian ~89.8–86.3Ma |
|
|---|---|
| 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′N 122°00′W / 38.6°N 122.0°W |
| Approximate paleocoordinates | 42°48′N 86°30′W / 42.8°N 86.5°W |
| Region | California |
| Country |  United States |
| Extent | Sacramento Valley |
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.
Fossil content
The following fossils were reported from the formation:
- Bivalves
- Cladoceramus undulatoplicatus
- Glycymerita veatchii
- Inoceramus subundatus
- I. Inoceramus vancouverensis
- I. aff. chicoensis
- I. aff. klamathensis
- I. aff. whitneyi
- Parallelodon (Nanonavis) brewerlanus
- Pseudomelania colusaensis
- Gastropods
- Bernaya (Protocypraea) kayei
- Biplica obliqua
- Dentalium (Entalis) whiteavesi
- Pseudomelania colusaensis
- Tessarolax distorta
- Volutoderma californica
- Ammonites
- Baculites chicoensis
- B. inornatus
- Desmophyllites diphylloides
- Eupachydiscus arbucklensis
- E. willgreeni
- Eutrephoceras campbelli
- Lytoceras (Gaudryceras) alamedense
- Nowakites dobbinsi
- N. rumseyensis
- Oxybeloceras petrolense
- Parapachydiscus cortinaensis
- Puzosia (Holcodiscoides) gorrilli
- Puzosia (Parapuzosia) arenaica
- Baculites sp.
- Canadoceras sp.
- Hauericeras sp.
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Forbes Shale Facts for Kids. Kiddle Encyclopedia.