Xikeng Formation

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Xikeng Formation
Stratigraphic range: Telychian–Early Devonian
Type Geological formation
Underlies Xiaoxi Formation
Overlies Xiajiaqiao Formation [1]
Lithology
PrimarySandy mudstone, siltstone
Other Sandstone
Location
Location Xiushui County
Region Jiangxi Province
CountryChina

The Xikeng Formation is located in Xiushui County, Jiangxi Province, and contains alternating beds of purplish red, grayish green and yellow green sandy and muddy rocks. The Xikeng Formation is dated to the Late Silurian - Early Devonian period. [2]

A new outcrop was identified within Baishui town in 2025 which extended the age of the Xikeng Formation to 436 million years ago. [3]

References

  1. Shan, Xianren; Zhu, Min; Zhao, Wenjin; Pan, Zhaohui; Wang, Pingli; Gai, Zhikun (15 May 2020). "A new genus of sinogaleaspids (Galeaspida, stem-Gnathostomata) from the Silurian Period in Jiangxi, China". PeerJ. 8: e9008. doi: 10.7717/peerj.9008 . ISSN   2167-8359. PMC   7233274 . PMID   32461826.
  2. Zhang, Shouxin (2009). Geological Formation Names of China. p. 1253. ISBN   978-3540-93823-1.
  3. Lin, X.; Zan, C.; Gai, Z.; Zhu, M. (2025). "Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications". Journal of Systematic Palaeontology. 23 (1). 2460479. doi:10.1080/14772019.2025.2460479.