Chaochuan Formation
Geologic formation in Zhejiang, China
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The Chaochuan Formation is a geologic formation in China (Zhejiang Province). It is made up of purplish red calcarenaceous, muddy siltstone, fine-grained sandstone with interbeds of tuffaceous sandstone and conglomerate or rhyolitic tuff.[1]
TypeFormation
UnderliesFangyan Formation
OverliesEarly Cretaceous tuff and Moshishan Group
Thicknessup to 518 metres (1,699 ft)
| Chaochuan Formation | |
|---|---|
| Stratigraphic range: Albian-Cenomanian ~ | |
| Type | Formation |
| Underlies | Fangyan Formation |
| Overlies | Early Cretaceous tuff and Moshishan Group |
| Thickness | up to 518 metres (1,699 ft) |
| Lithology | |
| Primary | Sandstone, siltstone |
| Other | Tuff |
| Location | |
| Coordinates | 28.7°N 119.2°E |
| Approximate paleocoordinates | 35.6°N 117.0°E |
| Region | Zhejiang Province |
| Country | China |
  Chaochuan Formation (China)  Chaochuan Formation (Zhejiang) | |
Fossil content
The following fossils were reported from the formation:
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
Ornithischians
| Ornithischians of the Chaochuan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Dongyangopelta[2] | D. yangyanensis | Zhejiang Province, China | Albian to Cenomanian | A nodosaurid ankylosaur | ||
| Zhejiangosaurus[3] | Z. lishuiensis | Zhejiang Province, China | Canomanian | A euankylosaurian anylosaur | ||
Theropods
| Theropods of the Chaochuan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Therizinosauridae Indet.[4][5][6] | Indeterminate | Zhejiang Province, China | Cenomanian | A therizinosaurid therizinosauroid; once known as "Chilantaisaurus" zheziangensis | ||
| Grallator[7] | G. isp. | Zhejiang Province, China | 14 isolated tracks | Likely produced by a non-arctometatarsalian theropods | ||
| cf. Asianopodus[7] | cf. I. isp. | Zhejiang Province, China | 21 tracks | Showing possible gregarious behavior based on all tracks oriented in the sane direction. Likely produced by an ornithomimosaurian trackmaker. | ||