Moergenhe Fm
Type Locality and Naming
The type section is located around Dengxinhundi on the south bank of the Molegeer River (the Moergen River), Chen Barag Banner, Inner Mongolia. It was named by Ning Qisheng et al. in 1959.
Lithology and Thickness
Volcanic Tuff. A suite of volcanic tuff facies. The Lower part consists of flesh-red volcanic brecciated tuff and brecciated crystal tuff intercalated with siliceous tuff; and the Middle and Upper parts are composed of variegated andesite intercalated with dacite and crystal-lithic tuff, with gray-purple basaltic tuffaceous lava at top. Exposed thickness 1731 m.
Relationships and Distribution
Lower contact
Unknown: the bottom boundary is unclear. Next older unit is the Hongshuiquan Fm claystone.
Upper contact
Conformable contact with the overlying Xiertala Fm
Regional extent
Distributed in Chen Barag Banner, northern Yakeshi City to the farm 16 km from Ergun Left Banner, Inner Mongolia
GeoJSON
Fossils
The formation is dominated by volcanic rock, with no fossils found.
Age
Depositional setting
It is interpreted as a major episode of explosive volcanism.
Additional Information