Sunjiagou Formation
The Sunjiagou Formation is a geological formation in Shanxi, China. It is of Lopingian age. The lower and middle parts of the formation consists of intensely bioturbated fine grained sandstones and thinly interbedded mudstones, deposited in a shallow-shore lake depositional environment, while the upper part consists of fine grained sandstone, siltstone and mudstone.[1] Alongside the Naobaogou Formation, it has provided an important vertebrate fauna.
| Sunjiagou Formation Stratigraphic range: Late Wuchiapingian-earliest Induan | |
|---|---|
| Type | Geological formation |
| Unit of | Shiqianfeng Group |
| Underlies | Liujiagou Formation |
| Overlies | Shangshihezi Formation |
| Thickness | 100-200 metres |
| Lithology | |
| Primary | Sandstone, Siltstone, Mudstone |
| Location | |
| Country |  China |
| Extent | Shanxi |
Paleobiota
| Genus | Species | Material | Notes |
|---|---|---|---|
| Sanchuansaurus[2] | S. pygmaeus | Pareiasaur | |
| Shihtienfenia [2] | S. permica | Pareiasaur | |
| Seroherpeton[3] | S. yangquanensis | right upper jaw and palate | Embolomeri |
| Taoheodon[4] | T. baizhijuni | Dicynodont | |
| Cryptodontia[5] | Indeterminate | Partial skull | Dicynodont |
References
- Chu, Daoliang; Tong, Jinnan; Song, Haijun; Benton, Michael J.; Bottjer, David J.; Song, Huyue; Tian, Li (2015-06-09). "Early Triassic wrinkle structures on land: stressed environments and oases for life". Scientific Reports. 5 (1): 10109. doi:10.1038/srep10109. ISSN 2045-2322.
- Benton, Michael J. (August 2016). "The Chinese pareiasaurs". Zoological Journal of the Linnean Society. 177 (4): 813–853. doi:10.1111/zoj.12389.
- Chen, Jianye; Liu, Jun (2020-12-01). "The youngest occurrence of embolomeres (Tetrapoda: Anthracosauria) from the Sunjiagou Formation (Lopingian, Permian) of North China". Fossil Record. 23 (2): 205–213. doi:10.5194/fr-23-205-2020. ISSN 2193-0066.
- Liu, Jun (2020-01-02). "Taoheodon baizhijuni , gen. et sp. nov. (Anomodontia, Dicynodontoidea), from the upper Permian Sunjiagou Formation of China and its implications". Journal of Vertebrate Paleontology. 40 (1): e1762088. doi:10.1080/02724634.2020.1762088. ISSN 0272-4634.
- Yi J, Liu J, 2020. Pareiasaur and dicynodont fossils from upper Permian of Shouyang, Shanxi, China. Vertebrata PalAsiatica, 58(1): 16–23
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