| Hanhe-Huachi Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation | 
| Unit of | Zhidan Group | 
| Underlies | Luohan Formation | 
| Overlies | Luohe Formation | 
| Thickness | 400-500 metres | 
| Lithology | |
| Primary | Mudstone, sandstone | 
| Location | |
| Region | Gansu | 
| Country | China | 
The Hanhe-Huachi formation, also called Huachi-Hanhe formation is a geologic formation in China. It is Early Cretaceous, probably Hauterivian, in age. [1] The Pterosaur Huanhepterus has been recovered from the formation.