Zhongmeng Fm
Type Locality and Naming
The type section is located at Hongshanzui on the Sino-Mongolia border, the north slope of the Altay Mts. in Xinjiang. It was named by Liao Zhuoting et al. in 1990.
Lithology and Thickness
Sandstone and Volcanics. Dominated by phyllite to muddy slate and metamorphosed volcanic rock, being continental clastic rock deposits. In the type section, only the lower and middle parts are seen, while the upper part lies on the side of Mongolia, which was not surveyed. Exposed thickness >490 m.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Hongshanzui Fm
Upper contact
Unknown: The top is not seen
Regional extent
Distributed in the area east of the Kalaerqisi River, Altay, and mainly seen at Kuermutu, Zhengge River, Kumasu, etc. on the Sino-Mongolia border.
GeoJSON
Fossils
The muddy slate in the lower part contains fossil plants. Containing important elements of the Angara flora, such as Paragondwanidium aff. sibiricum, Rufloria sp., etc.
Age
Depositional setting
It is interpreted as continental clastic deposits
Additional Information