Shetai Fm
Type Locality and Naming
The type section is located at Shuanmazhuang Gully, about 5 km north of Shetai Town, Urad Front Banner, Inner Mongolia. It was named by Jin Xiangfu in 1981.
Lithology and Thickness
Sandstone and Claystone. Terrigenous fine-grained clastic rocks of the littoral-lagoon facies. At Shuanmazhuanggou, the Bottom part is composed of gray-green or purple-red sandstone-conglomerate (the pebbles being quartz and limestone). Middle and Upper parts are interbeds of irregular thicknesses of gray-green sandy or carbonaceous shale with gray-white quartz sandstone; the upper horizon has intercalations of thin coal and coal streaks, locally with cross-bedded sandstone. Thickness 164 m.
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Mid-Upper Ordovician Series
Upper contact
Conformable contact with the overlying Shuanmazhuang Fm
Regional extent
Distributed around Shuanmazhuang Gully of the Urad Front Banner and the Zhongbugesu area of the Tumd Right Banner, Inner Mongolia
GeoJSON
Fossils
Contains abundant fossil plants belonging to the Euro-American flora: the Neuropteris gigantea-Linopteris brongniartii assemblage, including N. kaipingiana, N. cf. pseudogigantea, N. cf. otozamioides, Lepidodendron galeatum, etc.
Age
Depositional setting
It is interpreted as a littoral-lagoon facies
Additional Information