Maoershan Fm
Type Locality and Naming
It was named by Zhong Weicheng, Yangyu in 1964. The naming section is located in the area of the Maoer Mt of Shangzhi County, Heilongjiang Province, with its reference section being situated in the vicinity of the Shanhe Forestry Farm of Shangzhi County.
Synonym: （帽儿山组）
Lithology and Thickness
Composed mainly of dark-grey, grey-black and grey-green intermediate-acidity volcanic rocks and volcaniclastics, intercalated with a small amount of normal sedimentary conglomerates and sandstones, with no fossils having been found, and with a thickness of over 1000 m.
Relationships and Distribution
Lower contact
Its basal part is in an unconformable contact with the underlying Tai'antun Fm
Upper contact
Regionally, the schematic strat column had indicated the next younger unit as the volcanics of the Ningyuancun Fm; which is implied by the Cretaceous Lexicon to be mid-Cret and slightly further to the west (column Cret 20).
Regional extent
It is distributed extensively and is found to occur largely in the Xiaoling, Dalijiadian, Banfangzi and Daqingdingzi areas of Acheng County; the Mao’er Mt, Taiantun, Yongfatun and Daqing Mt areas of Shangzhi County; the Chonghe area of Wuchang County; the Shenshu area of Tieli County; the Chuiluan area of Yichun City, as well as in Nancha and Tangyuan Counties.
GeoJSON
Fossils
No fossil record found.
Age
Depositional setting
The formation represents volcanic eruptive deposits.
Additional Information