Zaoshang Fm
Period:
Jurassic
Age Interval:
Early Jurassic, (TJ96)
Province:
Anhui
Type Locality and Naming
Type section at Zaoshang village, close to Chengtanjiang, Liuyang County, Hunan Province. Named by Wang Sien et al., 1985, Stratigraphy of China II, Jurassic of China, Beijing: Geological Publishing House. First appeared in a 1975 manuscript by Institute of Geology and Coal Exploration, China Coal Research Institute.
Synonym: lower Shikang Fm
Lithology and Thickness
Alternating beds of conglomerate, rudite, gray thick-bedded quartzose sandstone and sandy mudstone
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
The next older regional unit in east Hunan is the Qixia Fm of early Permian.
Upper contact
Conformable contact with the overlying Shikang Fm.
Regional extent
The Xiuning Basin is a small intermountain basin during the Mesozoic.
GeoJSON
null
Fossils
Age
Schematic strat column in previous "red Chinese Lexicon" implied that the Zaoshang Fm was latest Triassic through earliest Jurassic.
Age Span:
Beginning stage:
Rhaetian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
205.74
Ending stage:
Hettangian
Fraction up in the ending stage:
1.0
Ending date (Ma):
199.46
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information from Geological Formation Names of China (1866-2000), Springer