Suining Formation Explained

Suining Formation
Type:Geological formation
Period:Berriasian
Prilithology:Mudstone
Otherlithology:Sandstone, siltstone
Region:Asia
Unitof:Sichuan Basin
Underlies:Penglaizhen Formation
Overlies:Upper Shaximiao Formation
Thickness:Several hundred meters

The Suining Formation 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

GenusSpeciesPresenceNotesImages
Mamenchisaurus[3] M. anyuensisGeographically located in Sichuan, China.
YangchuanosaurusYangchuanosaurus sp.
  1. Geographically located in Sichuan, China.
Qijianglong

See also

References

Bibliography

Notes and References

  1. Wang . Jun . Norell . Mark A. . Pei . Rui . Ye . Yong . Chang . Su-Chin . Surprisingly young age for the mamenchisaurid sauropods in South China . Cretaceous Research . July 2019 . 104 . 104176 . 10.1016/j.cretres.2019.07.006 . 2019CrRes.10404176W .
  2. Huang. Diying. 19 October 2018. Jurassic integrative stratigraphy and timescale of China. Science China Earth Sciences. en. 62. 1. 223–255. 10.1007/s11430-017-9268-7. 134359019. 1674-7313.
  3. Book: Weishampel, David B . etal . 2004 . Dinosaur distribution (Late Jurassic, Asia) . Weishampel . David B. . Dodson . Peter . Osmólska . Halszka . The Dinosauria . limited . 2nd . Berkeley . University of California Press . 550–552 . 0-520-24209-2 .