Weimei Fm
Type Locality and Naming
It was named by Wu Haoruo in 1984. The naming section is located in Weimei Village on the north bank of Renpulaqu River which is 20 km northeast to the downtown of Gyangzê (Jiangzi) County (ca. 28.9N, 89.6E) in southern Tibet.
Synonym: （维美组）
Lithology and Thickness
It is composed of an alternating layer of grey, greyish black shales and fine-grained quartz-sandstones, intercalated with limestones and siltstones. Its thickness is more than 376 m, with no base having been found.
Relationships and Distribution
Lower contact
Not given
Upper contact
It is in a conformable contact with the overlying Jiabula Fm (=synonym for Xiajiabula Gr )
Regional extent
It is distributed in Zhongba-Gyangzê (Jiangzi), with a thickness of 330-3574 m.
GeoJSON
Fossils
It yields ammonite fossils as Himalayites, H. aff. breceli, Phylloceras sp., Spiticeras sp., Haplophylloceras, Berriasella and Neocomites; and belemnites as Belemnopsis uhligi and Hibolithes verbeeki.
Age
Depositional setting
It is interpreted as a shallow-marine environment.
Additional Information
The Weimei Formation is absent in the original Chinese edition of “Stratigraphical lexicon of China”. The current information is based on Bureau of Geology and Mineral Resources of Tibet Autonomous Region (1997).