Zuoyun Formation
Early Cretaceous geologic formation in China
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The Zuoyun Formation is an Early Cretaceous (estimated Albian)[1] geologic formation in Shanxi Province, China.[2] Dinosaur fossils attributable to the genus level are known from this formation.[1] During the Early Cretaceous, the Zuoyun area was generally dominated by an arid subtropical environment. There was irregular alternation of arid and humid climate, during which catastrophic flooding resulted in thick proluvial fan conglomerate-mudstone deposits.[3]
UnderliesZhumapu Formation
PrimaryConglomerate, mudstone
| Zuoyun Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Underlies | Zhumapu Formation |
| Lithology | |
| Primary | Conglomerate, mudstone |
| Location | |
| Coordinates | 40.0°N 112.7°E |
| Approximate paleocoordinates | 42.4°N 104.1°E |
| Region | Shanxi Province |
| Country | China |
  Zuoyun Formation (China)  Zuoyun Formation (Shanxi) | |
Dinosaurs
Remains of the following dinosaurs have been found in the formation:
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
| Yanbeilong[1] | Y. ultimus | Sacrum, pelvic girdle, dorsal vertebrae, and one caudal vertebra | A stegosaurine stegosaurid |  | ||