Shiling Fm
Period:
Jurassic, Cretaceous
Age Interval:
Late Jurassic to earliest Cretaceous, (Cret29d, TJ88)
Province:
Anhui
Type Locality and Naming
Type locality is Shiling in Shexian County, Anhui Province. Named by No.332 Team of Anhui Bureau of Metallurgical Geology, 1971, Explanatory Text for 1∶200 000 Scale Geological Map: Qimen, Tunxi Sheet. [Note: there is also a Shiling Fm of late Carboniferous age in Liujiang Basin, Hebei Province; but not in current Carboniferous Lexicon entries.]
Synonym:
Lithology and Thickness
Andesite and rhyolite
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
Schematic "red Chinese Lexicon" strat column indicates the next older regional unit is the Bingqiu Fm of Kimmeridgian.
Upper contact
Schematic "red Chinese Lexicon" strat column indicates the next younger regional unit is the Yantang Fm of Valanginian.
Regional extent
Tunxi area, south Anhui.
GeoJSON
null
Fossils
Age
Previously considered to span Jur-Cret boundary. Radiometric dates (SHRIMP; LA-ICP-MS) on a rhyolite have a weighted average of 154.7 ±2.5 Ma (YU Xinqi, CHEN Ziwei, LIU Xiu, JI Xiang, ZHOU Shuzhao, YANG Xinpeng, 2016. LA-ICP-MS zircon age of volcanic rock of Shiling Formation in Tunxi area, south Anhui, and redetermination of its epoch. Geological Bulletin of China, 35(1): 175-180). However, Cretaceous Lexicon entry for the overlying Yantang Fm had " Volcanic tuff of the underlying Shiling Fm upper member dates as ca. 140 +/- 1.5 Ma = mid Berriasian (followed by unconformity)". Therefore, assigned as late Kimmeridgian through mid-Berriasian here.
Age Span:
Beginning stage:
Kimmeridgian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
152.01
Ending stage:
Berriasian
Fraction up in the ending stage:
0.5
Ending date (Ma):
140.40
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Information from Geological Formation Names of China (1866-2000), Springer