Heshilafu Fm
Type Locality and Naming
The type section is located at Heshilafu, Shache County, Xinjiang. It was named by by Wu Naiyuan et al. in 1976.
Lithology and Thickness
Limestone. Composed mainly of light-gray to black-gray limestone, shell limestone and organic limestone, intercalated with light-gray-green and brown-red siltstone, fine-grained sandstone and blackādark-gray shale, light-gray quartzose sandstone and conglomerate, 472.2 m thick. The formation does not change much in lithology, and the thickness is thickening from east to west.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Kelitak Fm; coeval with Hantierek Fm in this same region
Upper contact
Conformable contact with the overlying Kalawuyi Fm
Regional extent
Distributed in the foreland of the Kunlun Mts. south of Yengisar-Yecheng of the Qipan Mountain area, and around Sangzhutag and Bochatetag south of Pishan Mt., extending NW-SE in a strip.
GeoJSON
Fossils
Abundant Fusulinids: the Eostaffella mosquensis assemblage zone; corals Dibunophyllum sp., Arachnolasma sp., Hexaphyllia sp., Gangamophyllum sp., Clisiophyllum sp., Zaphrentoides sp., Carcinophyllum sp. and Caninia sp.; Brachiopods Gigantoproductus edelburgensis-Striatifera assemblage zone; Foraminifer Archaediscus-Plectogyra-Janischewiskina assemblage zone; Ammonoid Goniatites sp., etc.
Age
Depositional setting
It is interpreted as a neritic carbonate facies intercalated with clastic rocks
Additional Information