The Ermaying Formation is a geological formation of Anisian (Middle Triassic) age in north-central China.[1] It is found across much of the Ordos Basin, at outcrops within the provinces of Shaanxi, Shanxi, and Inner Mongolia. It is composed of up to 600 m thick sequence of mudstone and sandstone, overlying the Heshanggou Formation and underlying the Tongchuan Formation.[2][3] In the southern part of the Ordos Basin, the Zhifang Formation is equivalent to the Ermaying Formation.[4]
The Ermaying Formation is divided into two members, each with a distinctive assemblage of tetrapod fossils. A 2013 study used SHRIMP U-Pb radiometric dating to assign an imprecise age of 245.9 ± 3.2 Ma for the upper member.[5] A 2018 study assigned a more precise age of around 243.53 Ma based on three ash samples near the base of the upper member. This would indicate that the Upper Ermaying Formation is no older than the late Anisian stage.[6]
A few studies apply the name "Ermaying Formation" to a sedimentary unit in the Yanshan belt, a fold-thrust belt northeast of Beijing. In the Yanshan belt, reported exposures of the formation are dated to the Late Triassic, lying below the Early Jurassic Xingshikou Formation.[7][8] The Yanshan belt exposures are also known as the Huzhangzi Formation, an alternative name proposed to reflect their chronological and geographic divergence from exposures in the Ordos Basin.[8][6][4]
^Desojo, J. B. (2013). Anatomy, Phylogeny and Palaeobiology of Early Archosaurs and their Kin. ISBN 978-1862393615.
^Zhu, Zhicai; Liu, Yongqing; Kuang, Hongwei; Newell, Andrew J.; Peng, Nan; Cui, Mingming; Benton, Michael J. (2022-09-01). "Improving paleoenvironment in North China aided Triassic biotic recovery on land following the end-Permian mass extinction". Global and Planetary Change. 216: 103914. Bibcode:2022GPC...21603914Z. doi:10.1016/j.gloplacha.2022.103914. ISSN 0921-8181.
^Sues, Hans-Dieter; Fraser, Nicholas C. (2010). Triassic life on land : the great transition. New York: Columbia University Press. ISBN 978-0231135221.
^ abMeng, Qing-Ren; Wu, Guo-Li; Fan, Long-Gang; Wei, Hong-Hong (2019-03-01). "Tectonic evolution of early Mesozoic sedimentary basins in the North China block". Earth-Science Reviews. 190: 416–438. Bibcode:2019ESRv..190..416M. doi:10.1016/j.earscirev.2018.12.003. ISSN 0012-8252. S2CID 135264897.
^Liu, Jun; Li, Lu; Li, Xing-Wen (2013). "SHRIMP U-Pb zircon dating of the Triassic Ermaying and Tongchuang formations in Shanxi, China and its stratigraphic implications" (PDF). Vertebrata PalAsiatica. 51 (2): 162–168.
^ abLiu, Jun; Ramezani, Jahandar; Li, Lu; Shang, Qing-Hua; Xu, Guang-Hui; Wang, Yan-Yin; Yang, Jia-Sheng (2018). "High-precision temporal calibration of Middle Triassic vertebrate biostratigraphy: U-Pb zircon constraints for the Sinokannemeyeria Fauna and Yonghesuchus". Vertebrata PalAsiatica. 56 (1): 16–24. doi:10.19615/j.cnki.1000-3118.170808.
^Meng, Qing-Ren; Wei, Hong-Hong; Wu, Guo-Li; Duan, Liang (2014-01-25). "Early Mesozoic tectonic settings of the northern North China craton". Tectonophysics. 611: 155–166. Bibcode:2014Tectp.611..155M. doi:10.1016/j.tecto.2013.11.015. ISSN 0040-1951.
^ abWei, HongHong; Wu, GuoLi; Duan, Liang (2015-04-01). "Revisiting Triassic stratigraphy of the Yanshan belt". Science China Earth Sciences. 58 (4): 491–501. Bibcode:2015ScChD..58..491W. doi:10.1007/s11430-014-5042-x. ISSN 1869-1897. S2CID 130672024.
and 24 Related for: Ermaying Formation information
The ErmayingFormation is a geological formation of Anisian (Middle Triassic) age in north-central China. It is found across much of the Ordos Basin, at...
Halazhaisuchus qiaoensis, which was named in 1982 from the lower ErmayingFormation in Shaanxi. It was assigned to the family Euparkeriidae as a close...
as far as the Fremouw Formation of Antarctica, Donguz Formation ("Eryosuchus fauna") of Russia, and Lower ErmayingFormation of China. Cynognathus and...
China. The first fossils of Shansisuchus were discovered from the ErmayingFormation of Shanxi (Shansi) province in 1964 by Chinese paleontologist Yang...
an extinct genus of gomphodont cynodonts from the Middle Triassic ErmayingFormation of China. Its type and only species is Sinognathus gracilis, which...
bones. These bones were found at the Hsishihwa locality in the upper ErmayingFormation, which dates to the late Anisian stage about 242 million years ago...
paleontologist Yang Zhongjian (better known as C. C. Young) in 1957 from the ErmayingFormation. Cisneros, J. C. (2008). "Phylogenetic relationships of procolophonid...
constrained, such as Xilousuchus, a ctenosauriscid from the Heshanggou Formation of China. Xilousuchus is neither the earliest-branching archosaur nor...
LVF-defining index taxa. For example, the ErmayingFormation of China is correlated with the Moenkopi Formation of the United States via a tenuous (and...
by C. C. Young in 1964, based on a specimen from the Anisian-age ErmayingFormation of China. It was long believed to be the geologically youngest species...
found in the Hsishihwa locality at Wuhsiang, China, from the Upper ErmayingFormation (also Ehrmaying). The locality dates back to the Anisian stage of...
new species of Nothogomphodon (Therapsida: Therocephalia) from the ErmayingFormation of Shanxi, China" (PDF). Vertebrata PalAsiatica. 53 (2): 123–132....
IVPP V 8808, described in 1991 from the lower ErmayingFormation in Shanxi. The lower ErmayingFormation dates back to the Olenekian stage of the Early...
Donguz Formation, contemporaneous fossiliferous formation of Russia ErmayingFormation, contemporaneous fossiliferous formation of China Manda Formation, contemporaneous...
Donguz Formation, contemporaneous fossiliferous formation of Russia ErmayingFormation, contemporaneous fossiliferous formation of China Manda Formation, contemporaneous...
specimen, IVPP V6070 was collected in the Zhuengeerqi locality, from the ErmayingFormation (upper Olenekian stage), Ordos Basin. Additional 17 specimens, IVPP V6065-69...
new species of Nothogomphodon (Therapsida: Therocephalia) from the ErmayingFormation of Shanxi, China". Johannesburg, South Africa: Evolutionary Studies...
discovered by a petroleum survey team in October 1958 from the Lower ErmayingFormation in Shanxi Province, which dates back to the Olenekian stage. Young...
taxonomy of the former taxon, is described from the Middle Triassic ErmayingFormation (Ordos Basin, Shaanxi, China) by Jun Liu (2022). Description of the...
a synonym of S. xilougoensis. Shaanbeikannemeyeria hails from the ErmayingFormation, which also yields the genera Fenhosuchus, Eumetabolodon, Halazhaisuchus...
also known from Inner Mongolia but comes from the slightly younger ErmayingFormation. Both genera were once placed in the family Ordosiidae, but as the...
dicynodont. Fossils of the genus have been found in the Ermaying, Tongchuan and Kelamayi Formations of China. "Parakannemeyeria Sun, 1960". www.gbif.org...
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