| Tochikubo Formation | |
|---|---|
| Stratigraphic range: Late Jurassic | |
| Type | Geological formation |
| Unit of | Somanakamura Group |
| Underlies | Nakanosawa Formation |
| Overlies | Yamagami Formation |
| Area | Japan |
| Thickness | Up to 350 m |
| Lithology | |
| Primary | Sandstone, Shale |
| Location | |
| Country | Japan |
| Extent | Abukuma Highlands, eastern Honshu |
The Tochikubo Formation is a Jurassic geologic formation in northern Honshu, Japan, dating to the Oxfordian stage of the Late Jurassic. Fossil ornithopod tracks have been reported from the formation. [1] As well as the Bennettitalean Kimuriella. [2]