| Sunjiawan Formation | |
| Type: | Geological formation |
| Age: | Early Cenomanian ~ |
| Period: | Cenomanian |
| Prilithology: | Conglomerate |
| Otherlithology: | Sandstone, siltstone, mudstone |
| Region: | Liaoning |
| Coordinates: | 41.7°N 120.8°W |
| Paleocoordinates: | 46.2°N 112.1°W |
| Overlies: | Unconformity with Fuxin Formation |
| Extent: | Beipiao Basin |
The Sunjiawan Formation is a geological formation in Liaoning, China, with strata possibly dating back to the early Late Cretaceous, specifically the Cenomanian.[1] Dinosaur remains are among the fossils that have been recovered from the formation.[2] It forms part of the same geological sequence as the older and underlying Yixian Formation and Jiufotang Formation. It primarily consists of variegated conglomerates with rare intercalations of thin bedded sandstones, siltstones and mudstones.[3]
Remains of the following dinosaurs have been found in the formation:
Remains of the following dinosaurs have been found in the formation:
| Dinosaurs reported from the Sunjiawan Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| Crichtonpelta | C. benxiensis | a partial skeleton | ||
| Crichtonsaurus | C. bohlini | a partial skeleton | ||
| Shuangmiaosaurus | S. gilmorei | a partial left upper jaw and lower jaw, | ||