Earth:Hekou Formation

From HandWiki
Hekou Formation
Stratigraphic range: Late Cretaceous, ?Maastrichtian[1]
TypeGeological formation
Unit ofGuifeng Group
UnderliesTangbian Formation
OverliesUnconformity: Zhoutian Formation
Lithology
PrimaryConglomerate, glutenite
OtherSandstone, siltstone, tuff
Location
RegionJiangxi Province, Asia
CountryChina

The Hekou Formation is a Cretaceous geologic formation in China. Pterosaur fossils have been recovered from the formation. It is a unit of the Guifeng Group and dates to the Late Cretaceous.[2] Dinosaur fossils from the formation include a nearly perfect oviraptorid embryo nicknamed Baby Yingliang, an unnamed large hadrosaurid, and hadrosauroid eggs with embryos.[3][4][5] Mammal fossils include Erythrobaatar and Yubaatar qianzhouensis.[6][7] The polyglyphanodontian lizard Yechilacerta has also been described from the formation.[8]

Description

The Hekou Formation is a constituent of the Guifeng Group; a sequence of formations that were deposited in the Xinjiang Basin including the Hekou, Tangbian, and Lianhe formation which record aeolian-alluvial interactions in a palaeoplateau desert. Both a successional and coeval model of the deposition of these units have been proposed, with estimated ages of the Hekou formation ranging from Coniacian-Santonian to Maastrichtian.[9][10] The associated facies include alluvial fans and adjacent wadi river channels, with mudcracks indicating subaerial exposure of the deposits. Oxygen-18 isotope values recorded in Dinosaur eggshells indicated low annual precipitation and humidity, suggesting an arid to semi-arid environment. The occurrence of striated cobbles in the alluvial facies suggests glacial activity in the catchment areas of the Cretaceous plateau.[11][12]

See also

  • List of pterosaur-bearing stratigraphic units
  • List of dinosaur-bearing stratigraphic units

References

  1. ↑ Xing, Lida; Niu, Kecheng; Yang, Tzu-Ruei; Wang, Donghao; Miyashita, Tetsuto; Mallon, Jordan C. (2022-05-09). "Hadrosauroid eggs and embryos from the Upper Cretaceous (Maastrichtian) of Jiangxi Province, China" (in en). BMC Ecology and Evolution 22 (1). doi:10.1186/s12862-022-02012-x. ISSN 2730-7182. PMID 35534805. 
  2. ↑ Xi, D.; Wan, X.; Li, G.; Li, G. (2018). "Cretaceous integrative stratigraphy and timescale of China". Science China Earth Sciences 61: 1–31. doi:10.1007/s11430-017-9262-y. 
  3. ↑ Xing, Lida; Niu, Kecheng; Ma, Waisum; Zelenitsky, Darla K.; Yang, Tzu-Ruei; Brusatte, Stephen L. (2022). "An exquisitely preserved in-ovo theropod dinosaur embryo sheds light on avian-like prehatching postures". iScience 25 (1). doi:10.1016/j.isci.2021.103516. PMID 35106456. Bibcode: 2022iSci...25j3516X. 
  4. ↑ Xing, Lida; Niu, Kecheng; Wang, Donghao; Marquez, Albert Prieto (2020-06-18). "A partial articulated hadrosaurid skeleton from the Maastrichtian (Upper Cretaceous) of the Ganzhou area, Jiangxi Province, China" (in en). Historical Biology 33 (10): 2256–2259. doi:10.1080/08912963.2020.1782397. ISSN 0891-2963. https://www.tandfonline.com/doi/full/10.1080/08912963.2020.1782397. 
  5. ↑ "Hadrosauroid eggs and embryos from the Upper Cretaceous (Maastrichtian) of Jiangxi Province, China". BMC Ecology and Evolution 22 (1). 2022. doi:10.1186/s12862-022-02012-x. PMID 35534805. 
  6. ↑ Jin, X.; Mao, F.; Du, T.; Yang, Y.; Meng, J. (2022). "A new multituberculate from the latest Cretaceous of central China and its implications for multituberculate tooth homologies and occlusion". Journal of Mammalian Evolution 30: 1–20. doi:10.1007/s10914-022-09636-2. 
  7. ↑ Hu, J.; Han, F. (2021). "A new multituberculate, Yubaatar qianzhouensis sp. nov.: the first Late Cretaceous mammal from Ganzhou Basin, Jiangxi Province". Acta Palaeontologica Sinica 60 (4): 565–579. doi:10.19800/j.cnki.aps.2020057. http://gswxb.cnjournals.cn/gswxb/article/abstract/20210407. 
  8. ↑ Xing, Lida; Niu, Kecheng; Evans, Susan E. (2023). "A new polyglyphanodontian lizard with a complete lower temporal bar from the Upper Cretaceous of southern China". Journal of Systematic Palaeontology 21 (1). doi:10.1080/14772019.2023.2281494. ISSN 1477-2019. Bibcode: 2023JSPal..2181494X. 
  9. ↑ "UQ eSpace". https://espace.library.uq.edu.au/view/UQ:7aeace4. 
  10. ↑ Xi, Dangpeng; Wan, Xiaoqiao; Li, Guobiao; Li, Gang (2019-01-01). "Cretaceous integrative stratigraphy and timescale of China" (in en). Science China Earth Sciences 62 (1): 256–286. doi:10.1007/s11430-017-9262-y. ISSN 1869-1897. 
  11. ↑ Jiao, Haijing; Wu, Chihua; Rodríguez-López, Juan Pedro; Sun, Xiaoming; Yi, Haisheng (2020-10-01). "Late Cretaceous plateau deserts in the South China Block, and Quaternary analogues; sedimentology, dune reconstruction and wind-water interactions". Marine and Petroleum Geology 120. doi:10.1016/j.marpetgeo.2020.104504. ISSN 0264-8172. Bibcode: 2020MarPG.12004504J. https://www.sciencedirect.com/science/article/pii/S0264817220302877. 
  12. ↑ He, Qing; Jiang, Qin; Xing, Lida; Zhang, Shukang; Pang, Wenjing; Hu, Hui; Lu, Shuo; Yin, Qifeng (2019-07-01). "Geochemical characteristics of newly discovered Elongatoolithidae eggs from the Upper Cretaceous of Jiangxi Province, southern China: Palaeoenvironmental and palaeoclimatic inferences". Cretaceous Research 99: 352–364. doi:10.1016/j.cretres.2018.12.015. ISSN 0195-6671. Bibcode: 2019CrRes..99..352H. https://www.sciencedirect.com/science/article/pii/S0195667118302994. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Earth:Hekou_Formation&oldid=3993913"