Suining Formation
| Suining Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Sichuan Basin |
| Underlies | Penglaizhen Formation |
| Overlies | Upper Shaximiao Formation |
| Thickness | Several hundred meters |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, siltstone |
| Location | |
| Region | Asia |
| Country |  China |
The Suining Formation (simplified Chinese: 遂宁组; traditional Chinese: 遂寧組; pinyin: Suìníng Zǔ) is a geological formation in China whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. A 2019 paper shows zircon dating of the Suining Formation with a much younger age for the classically thought of Late Jurassic formation; the average age of the dating being roughly 114 myo or late upper Aptian.[1] However, these results were subsequently challenged, with suggestions that the age of the zircons was affected by metamorphism, and that the zircons clustering around 145 Ma near the Jurassic Cretaceous boundary are closer to the correct date.[2]
Paleobiota
Dinosaurs
| Genus | Species | Presence | Notes | Images |
|---|---|---|---|---|
|
M. anyuensis[3] |
 | |||
|
Yangchuanosaurus sp.[3] |
||||
See also
References
- ^ Wang, Jun; Norell, Mark A.; Pei, Rui; Ye, Yong; Chang, Su-Chin (July 2019). "Surprisingly young age for the mamenchisaurid sauropods in South China". Cretaceous Research. 104: 104176. doi:10.1016/j.cretres.2019.07.006.
- ^ Huang, Diying (19 October 2018). "Jurassic integrative stratigraphy and timescale of China". Science China Earth Sciences. 62 (1): 223–255. doi:10.1007/s11430-017-9268-7. ISSN 1674-7313. S2CID 134359019.
- ^ a b c d e f Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Jurassic, Asia)". In Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (eds.). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 550–552. ISBN 0-520-24209-2.
Bibliography
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