The Xikeng Formation is located in

Xiushui County Xiushui County () is a county in the northwest of Jiangxi Province, China, bordering the provinces of Hunan to the west and southwest and Hubei to the northwest. It is the westernmost county-level division of the prefecture-level city of Jiujiang ...

Jiangxi Jiangxi (; ; formerly romanized as Kiangsi or Chianghsi) is a landlocked province in the east of the People's Republic of China. Its major cities include Nanchang and Jiujiang. Spanning from the banks of the Yangtze river in the north into h ...

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 The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoi ...

- Early

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, w ...

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

References

Geologic formations of China Devonian System of Asia Silurian System of Asia {{China-geologic-formation-stub