Taohaiyingzi Fm
Type Locality and Naming
The type section is located in the West Hills of the Taohaiyingzi area, Baiyintala Region, Arlukelxin Banner, Inner Mongolia. It was named by the 2nd Regional Geological Survey Party of Liaoning Province in 1971.
Lithology and Thickness
Clastics. Composed mainly of thick-bedded clastic rocks. Lower part consists of black, grey and yellow-green tuffaceous shale, hornfels and fine-grained sandstone, intercalated with iron-manganese shale, yielding abundant animal and plant fossils. Lower part is intercalated with iron-manganese shale or sandy slate. Upper part is composed of grey-yellow metamorphosed sandstone, intercalated with black andalusite-cordierite slate and actinolite-hornfels, yielding a small amount of plant fossils (phytolites). In the section of the Taohaiyingzi area the base of the formation has not been exposed on the surface, with the thickness of the formation being of 3428 m. In the section of the Guandi area the top part of the formation has no exposures on the surface, with a thickness of over 881 m.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Linxi Fm
Upper contact
Unknown (not exposed)
Regional extent
Distributed in the Taohaiyingzi, the Qiaoluotu and the Linxi areas of the Arlukelxin Banner to the north of the Xilamulun River.
GeoJSON
Fossils
The section of the Guandi area yields Bivalves represented by Palaeanodonta and Anthraconauta; Plant fossils (phytolites) such as Rhipidopsis, Paracalamites and Schizoneura; Estheria represented by Pemphicyclus, Costestheria; and Ostracoda represented by Darwinula, etc.
Age
Depositional setting
It is interpreted as lake-facies deposits.
Additional Information