Shibachongxi Fm
Type Locality and Naming
Xueshan range, north Taiwan. The naming section is located at Shibachongxi—a branch creek east of the Chenyoulan Stream north of the Dongbo hot spring, Nantou County, Taiwan. It was used in the “Regional Geology of Taiwan Province” in 1992 and renamed the Shibachongxi Formation. Named the “Shibachongxi bed” by Li Chunsheng in 1979.
Lithology and Thickness
Mainly black to dark gray slate with light gray, thin-bedded, siliceous, fine to medium meta-sandstone and characterized by alternating black and white thin beds composed of slate and meta-sandstone. The thickness is >1000 m. The base of the formation is cut by a fault, so it is unable to know its total thickness.
Relationships and Distribution
Lower contact
No bottom being seen
Upper contact
It conformably underlies the Eocene Dajian Fm.
Regional extent
The formation occurs in a N-S-trending elongated zone, extending from Riyuetan southward to south of saddle of Tataka, Jade Mountain.
GeoJSON
Fossils
The foraminifera Assilina sp. and Nummulites sp. were found in sandstone and conglomerate at Shibachongxi and Junkengxi.
Age
Depositional setting
Additional Information