Moshishan Gr
Type Locality and Naming
Eastern Zhejiang. The Zhejiang Petroleum Geological Brigade erected the Moshishan Formation in the report on the summation of the petroleum geological work compiled in 1959. The section for designation is at Moshishan at the juncture between the Yongkang and Jinyun counties. Indicated as a Group in Xi et al. (2019; Cretaceous Integrated Stratigraphy and Timescale of China)
Synonym: Moshishan Fm.
Lithology and Thickness
The Moshishan Group is represented by a set of complicated volcanic rocks and subsequently it generally stands for the Upper Jurassic volcanic sedimentary rock series. In 1971 the Zhejiang Regional Geological Survey Team recalled it the Moshishan Group, which was divided into three cycles and six rock members. In 1989 it was quoted by the Zhejiang Bureau of Geology and Mineral Resources who designated the six members in ascending order as the Dashuang Fm, Gaowu Fm, Xishantou Fm, Chawan Fm, Jiuliping Fm and Zhucun Fm.
Relationships and Distribution
Lower contact
The lower formation of Dashuang Fm lies unconformably on the underlying Maonong Fm (middle Jurassic) or obviously unconformably overlaps the older strata. It lies unconformably over the Jinning granite.
Upper contact
Its top is bounded by the Guantou Fm comprising gray green thin-bedded tuffaceous conglomerate, showing an unconformity between the two.
Regional extent
The formation is distributed in southeast Zhejiang. See component formations.
GeoJSON
Fossils
None listed
Age
Depositional setting
Additional Information