Tianchihe Fm
Type Locality and Naming
It was named by the Compiler
Jingeng Sha (coordinator) Group for the Regional Stratigraphic Chart of Shanxi Province in 1979. The naming section is located at Chenjiaban Gully of Ningwu County, Shanxi Province.
Synonym: （天池河组）
Lithology and Thickness
It is composed essentially of purple medium-, and fine-grained sandstones and siltstones, intercalated with a small amount of purple sandy mudstone. It is of 235 m in thickness.
Relationships and Distribution
Lower contact
It is in a conformable contact with the underlying Yungang Fm
Upper contact
The overlying strata missing. Regionally, the schematic strat column indicates the next younger unit as Fuxian Fm; but in Shanxi-north, the next younger regional unit is the Zhangjiakou Fm volcanics of Valanginian.
Regional extent
The formation is distributed largely in Ningwu, Jingle and Yuanping Counties, and with its scattered distribution being found as well as in the Zhecai and Ruqiu areas of Guxian County. Its lithology is consistent from region to region, being composed mainly of purple sandstones in various regions, intercalated with purple sandy mudstones, with a thickness varying in a range from 200 m to 500 m.
GeoJSON
Fossils
Age
Depositional setting
It is interpreted as terrestrial environment.
Additional Information
Schematic strat column suggests Callovian age
Age span:
Beginning stage: Callovian
Fraction up in beginning stage: 0.0
Beginning date (Ma):
Ending stage: Callovian
Fraction up in ending stage: 1.0
Ending date (Ma):
Depositional setting:
It is interpreted as terrestrial environment.
Depositional-pattern:
Additional Information
Compiler
Jingeng Sha (coordinator)