From Wikipedia, the free encyclopedia
The Xintiangou Formation is a
geological formation in
China . Part of the stratigraphy of the
Sichuan Basin , it is of an uncertain
Middle Jurassic age, with preliminary
U-Pb estimates giving an age range of 170 ma. It predominantly consists of interbedded mudstone and sandstone, with subordinate shelly limestone. At the Laojun site remains of
lungfish ,
bony fish , freshwater sharks,
temnospondyls ,
plesiosaurs ,
[1]
[2]
crocodyliformes , the
Xinjiangchelyid
turtle
Protoxinjiangchelys and
tritylodontids are known.
[3] The dinosaurs
Sanxiasaurus ,
Yunyangosaurus , and indeterminate sauropods are also known from the formation.
[4]
[5] Theropod and ornithopod tracks have also been reported from the formation.
[6]
[7]
References
^ Zhang, Feng; Yu, Hai-Dong; Xiong, Can; Wei, Zhao-Ying; Peng, Guang-Zhao; Wei, Xue-Fang (December 2020).
"New freshwater plesiosaurian materials from the Middle Jurassic Xintiangou Formation of the Sichuan Basin, southwestern China" . Journal of Palaeogeography . 9 (1): 23.
doi :
10.1186/s42501-020-00072-y .
ISSN
2524-4507 .
^ Ma, Qingyu; Li, Ning; Lin, Yu; Xiong, Can; Wei, Xuefang (2023-10-11).
"Isolated freshwater pliosaurid teeth from the Middle Jurassic Xintiangou Formation of Chongqing, China" . Historical Biology : 1–10.
doi :
10.1080/08912963.2023.2268617 .
ISSN
0891-2963 .
S2CID
264056915 .
^ Hu, Xufeng; Li, Lu; Dai, Hui; Wang, Ping; Buffetaut, Eric; Wei, Guangbiao; Xiong, Can; Tong, Haiyan (August 2020).
"Turtle remains from the Middle Jurassic Xintiangou Formation of Yunyang, Sichuan Basin, China" . Annales de Paléontologie . 106 (4): 102440.
doi :
10.1016/j.annpal.2020.102440 .
S2CID
225451666 .
^ Li, Ning; Dai, Hui; Tan, Chao; Hu, Xufeng; Wei, Zhaoying; Lin, Yu; Wei, Guangbiao; Li, Deliang; Meng, Li; Hao, Baoqiao; You, Hailu (2019-10-31). "A neornithischian dinosaur from the Middle Jurassic Xintiangou Formation of Yunyang, Chongqing, China: the earliest record in Asia". Historical Biology . 33 (7): 1089–1102.
doi :
10.1080/08912963.2019.1679129 .
ISSN
0891-2963 .
S2CID
209583081 .
^ Hui Dai; Roger Benson; Xufeng Hu; Qingyu Ma; Chao Tan; Ning Li; Ming Xiao; Haiqian Hu; Yuxuan Zhou; Zhaoying Wei; Feng Zhang; Shan Jiang; Deliang Li; Guangzhao Peng; Yilun Yu; Xing Xu (2020).
"A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution" . Scientific Reports . 10 (1): Article number 139.
doi :
10.1038/s41598-019-56959-x .
PMC
6954265 .
PMID
31924836 .
^ Xing, Lida; Peng, Guangzhao; Ye, Yong; Lockley, Martin G.; Klein, Hendrik; Persons, W. Scott; Zhang, Jianping; Shu, Chunkang; Hao, Baoqiao (2014-04-03). "Sauropod and Small Theropod Tracks from the Lower Jurassic Ziliujing Formation of Zigong City, Sichuan, China, with an Overview of Triassic–Jurassic Dinosaur Fossils and Footprints of the Sichuan Basin". Ichnos . 21 (2): 119–130.
CiteSeerX
10.1.1.663.3037 .
doi :
10.1080/10420940.2014.909352 .
ISSN
1042-0940 .
S2CID
129220218 .
^ Xing, Lida; Lockley, Martin G.; Wang, Yongdong; Pole, Mike S.; Klein, Hendrik; Peng, Guangzhao; Xie, Xiaoping; Zhang, Guoquan; Deng, Chuntao; Burns, Michael E. (August 2017).
"New Middle Jurassic dinosaur track record from northeastern Sichuan Province, China" . Swiss Journal of Palaeontology . 136 (2): 359–364.
doi :
10.1007/s13358-016-0123-4 .
ISSN
1664-2376 .
S2CID
132256539 .