Sunjiawan Formation
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| Sunjiawan Formation | |
|---|---|
| Stratigraphic range: Early Cenomanian ~ | |
| Type | Geological formation |
| Overlies | Unconformity with Fuxin Formation |
| Lithology | |
| Primary | Conglomerate |
| Other | Sandstone, siltstone, mudstone |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Approximate paleocoordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Liaoning |
| Country | China |
| Extent | Beipiao Basin |
Sunjiawan Formation (China) Sunjiawan Formation (Liaoning) | |
The Sunjiawan Formation (simplified Chinese: 孙家湾组; traditional Chinese: 孫家灣組; pinyin: Sūnjiāwān Zǔ) 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]
Dinosaurs
[edit | edit source]Remains of the following dinosaurs have been found in the formation:
Color key
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Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
[edit | edit source]Ankylosaurs
[edit | edit source]| Ankylosaurs of the Sunjiawan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Crichtonpelta[4] | C. benxiensis | A partial skeleton. | A ankylosaurine ankylosaurid | |||
| Crichtonsaurus | C. bohlini | A partial skeleton. | A ankylosaurine ankylosaurid | |||
Ornithopods
[edit | edit source]| Ornithopods of the Sunjiawan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Hadrosauroidea Indet. | Indeterminate | |||||
| Shuangmiaosaurus | S. gilmorei | A partial left upper jaw and lower jaw. | A styracosternan ornithopod | |||
Sauropods
[edit | edit source]| Sauropods of the Sunjiawan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Borealosaurus | B. wimani | A titanosaurian sauropod | ||||
| Titanosauriformes Indet. | Indeterminate | |||||
Theropods
[edit | edit source]| Theropods of the Sunjiawan Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Tyrannosauroidea Indet. | Indeterminate | |||||
See also
[edit | edit source]References
[edit | edit source]Bibliography
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Further reading
[edit | edit source]- H. You, Q. Ji, J. Li and Y. Li. 2003. A new hadrosauroid dinosaur from the mid-Cretaceous of Liaoning, China. Acta Geologica Sinica 77(2):148-154
- Z.-M. Dong. 2002. A new armored dinosaur (Ankylosauria) from Beipiao Basin, Liaoning Province, northeastern China. Vertebrata PalAsiatica 40(4):276-285