Huangmaqing Fm

The type section is located at Zhongshan-Xiawangqi, Nanjing City, Jiangsu Province. It was named by Xie Jiarong in 1928. It is called Huangma Green Shale when it is named. In 1935, Li Yurao and others delineated the upper coal-bearing black shale and named it the Fanjiatang coal measure. In 1935, Li Siguang, Zhu Sen, etc. collectively referred to the Huangmaqing shale and Fanjiatang coal measures as Huangmaqing Fm. In 1962, Zhao Jinke and others renamed the Huangmaqing Shale to the Huangmaqing Group. The lower part is the Fanjiatang Coal Formation and the upper part is the Huangmaqing Fm. The age is classified as the Late Triassic. In 1970, the Jiangsu District Test Team changed the name of Huangmaqing Group to Huangmaqing Fm and placed Fanjiatang Fm in the Late Triassic. In 1977, the Anhui District Research Team re-defined the Huangmaqing Fm, referring to a set of purple-red clastic rocks above the Zhouchongcun Fm and below the Fanjiatang Fm.

Synonym:

It is composed of purple-red thin-thick layers of calcareous and argillaceous siltstone intercalated with fine sandstone, with oblique bedding and worm-tube structure. The thickness is 1059 m.

Plant: Anmalepis zeilleri, Neocalamites sp., Conchostraca: Diconiostracus, Protomoncarina, Euestheria, Xiangxiella, Ostracod: Darwinula, Bivalves: Bakevellia, Modeolus, Chara: Stellatochara, Stenochara, Caneatochara and Pollens.

It is interpreted as a set of red clastic rock deposits.