Xiwei Fm
Type Locality and Naming
Named by District Survey Team of Fujian Geological Bureau in 1965). The named section is located in Xiwei Village, Datian County, Fujian Province.
Synonym:
Lithology and Thickness
Characterized by a set of purple red complex with calcareous siltstone; rippled, veined, lenticular tidal bedding developed. Thickness is 398 to 727 m
Relationships and Distribution
Lower contact
Bottom boundary is marked by the appearance of purple sandstone. It is in conformable contact with underlying Xikou Fm of Lower Triassic.
Upper contact
Top boundary is marked by the disappearance of purple strata. It is in conformable contact with overlying Anren Fm of Upper Middle Triassic.
Regional extent
Distribution is limited, limited to parts of Longyan, Zhangping and Datian in Fujian, and may also be partly exposed near the Xingning, northern Guangdong Province.
GeoJSON
Fossils
In the lower part of bivalves, can build Eumorphotis inaequicostata-Entolium discites microtis assemblages; Unionites sp., Pachymya (Arcomya) sp., Entolium discites etc. can be found in the upper part.
Age
Depositional setting
The formation is a nearshore shallow water deposit.
Additional Information