Zuoyun Formation

Zuoyun Formation
Stratigraphic range: Albian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Underlies	Zhumapu Formation
Lithology
Primary	Conglomerate, mudstone
Location
Coordinates	40°00′N112°42′E / 40.0°N 112.7°E / 40.0; 112.7
Approximate paleocoordinates	42°24′N104°06′E / 42.4°N 104.1°E / 42.4; 104.1
Region	Shanxi Province
Country	China
Zuoyun Formation (China) Show map of China Zuoyun Formation (Shanxi) Show map of Shanxi

The Zuoyun Formation is an Early Cretaceous (estimated Albian) ^[1] geologic formation in Shanxi Province, China. ^[2] Dinosaur fossils attributable to the genus level are known from this formation. ^[1] During the Early Cretaceous, the Zuoyun area was generally dominated by an arid subtropical environment. There was irregular alternation of arid and humid climate, during which catastrophic flooding resulted in thick proluvial fan conglomerate-mudstone deposits. ^[3]

Dinosaurs

Remains of the following dinosaurs have been found in the formation:

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Yanbeilong [1]	Y. ultimus			Sacrum, pelvic girdle, dorsal vertebrae, and one caudal vertebra	A stegosaurine stegosaurid

See also

• List of dinosaur-bearing rock formations

References

1. Jia, Lei; Li, Ning; Dong, Liyang; Shi, Jianru; Kang, Zhishuai; Wang, Suozhu; Xu, Shichao; You, Hailu (2024-01-31). "A new stegosaur from the late Early Cretaceous of Zuoyun, Shanxi Province, China". Historical Biology : 1–10. doi:10.1080/08912963.2024.2308214. ISSN   0891-2963.
2. Yu,J.-X. (1986) The sporo-pollen assemblage from the Zuoyun Formation in Northwestern Shanxi and paleoclimate. Geological Review (Dizhi Lunping) Vol. 32:3, pg. 217- 224
3. 董黎阳, 伊剑; DONG Liyang, YI Jian (2018-03-24). "山西左云地区下白垩统左云组沉积相及其古气候意义". 地质论评 (in Chinese). 64 (2): 392–404. ISSN   0371-5736.