Gaoyugou Fm
Type Locality and Naming
The naming section is located in the vicinity of Gaoyugou ~25 km northeast of Luanchuan County, and ~5 km northwest of Tantou Township, Henan. The reference section is located in the Zhutoupo-Yaoshang area ~3 km east of Tantou Township. Named by Tong Yongsheng and Wang Jingwen in 1980.
Lithology and Thickness
Mainly purplish red mudstone. The lower part is usually intercalated with conglomerate or consists of alternating mudstone and conglomerate. In the vicinity of East Zhutoupo, Tantou Township, it is represented by brownish red sandy mudstone and pebbly sandstone with conglomerate lenses. The thickness is about 300–366 m.
Relationships and Distribution
Lower contact
It has a disconformable contact with the underlying Qiupa Fm (Cretaceous?)
Upper contact
Conformable contact with the overlying Middle Paleocene Dazhang Fm.
Regional extent
This formation is distributed at Gaoyugou, Tanyugou, Zhutoupo and Wangzhuang in Luanchuan County and Xiliang and Manyu of Dazhang in Songxian County.
GeoJSON
Fossils
Limited fossil species are found now in this formation, but according to its contained Bemalambda sp. and Mesonychids, their basic characters may broadly correlate with those of the early Paleocene Shanghu Formation in northern Guangdong.
Age
Depositional setting
It is interpreted to fluvial and lacustrine deposits.
Additional Information