| Tongfosi Formation | |
|---|---|
| Stratigraphic range: Cenomanian ~ | |
| Type | Geological formation | 
| Unit of | Yanji Group | 
| Lithology | |
| Primary | Sandstone | 
| Location | |
| Coordinates | 42°54′N129°12′E / 42.9°N 129.2°E | 
| Approximate paleocoordinates | 49°30′N121°06′E / 49.5°N 121.1°E | 
| Region | Jilin | 
| Country | China | 
The Tongfosi Formation is a Late Cretaceous (Cenomanian) geologic formation of the Yanji Group in China. [1] Fossil ornithopod tracks of iguanodontids and theropods have been reported from the fluvial sandstones of the formation. [2] [3]