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]

Suining Formation
Stratigraphic range: Late Jurassic–Early Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
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

Paleobiota

Dinosaurs

Genus	Species	Presence	Notes	Images
Mamenchisaurus[2]	M. anyuensis[2]	Geographically located in Sichuan, China.[2]
Qijianglong[3]	Q. guokr

Fish

Genus	Species	Presence	Notes	Images
Beiduyu[4]	B. qijiangensis

See also

• Qijianglong
• List of dinosaur-bearing rock formations