Suining Formation

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]

Suining Formation
Stratigraphic range:
TypeGeological formation
Unit ofSichuan Basin
UnderliesPenglaizhen Formation
OverliesUpper Shaximiao Formation
ThicknessSeveral hundred meters
Lithology
PrimaryMudstone
OtherSandstone, siltstone
Location
RegionAsia
Country China

Paleobiota

Dinosaurs
Genus Species Presence Notes Images

Mamenchisaurus[3]

M. anyuensis[3]

Geographically located in Sichuan, China.[3]
Yangchuanosaurus

Yangchuanosaurus[3]

Yangchuanosaurus sp.[3]
  1. Geographically located in Sichuan, China.[3]

Qijianglong

See also

References
  1. 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.
  2. 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.
  3. 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
  • Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2

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