Baijiadian Fm
Type Locality and Naming
The type section is in Nanshan (Mt.), Baijiadian, Aohan Banner, Inner Mongolia. It was named by Ju Ziyun et al. in 1959.
Lithology and Thickness
Claystone and Limestone. Its Lower part is represented by the Houfangshengou section, mainly composed of black silty slate, intercalated with gray-yellow calcareous grit and limestone lenses. For the Upper part, the Nanshan section is selected, which is dominated by gray limestone, clayey limestone and siliceous-banded limestone, intercalated with reef limestone, calcareous sandstone and minor slate. Locally epimetamorphosed. Thickness 1669 m.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Chaotugou Fm.
Upper contact
Conformable contact with the overlying Jiadaogou Fm.
Regional extent
Distributed in Baijiadian, Houfangshengou and Xiawaxi of Aohan Banner and Xiashipeidong of Sheman Banner.
GeoJSON
Fossils
Lower part contains Brachiopods Echinoconchus elegans and Punctospirifer cf. salemensis, Plants Neuropteris pseudovata and Pecopteris sp. Upper part has the Yuanophyllum kansuensis-Gigantoproductus assemblage, the important elements of which are: Corals Dibunophyllum bipartitum, Diphyphyllum hochangpingense, Arachnolasma irregulare, Lithostrotion asiaticum, Palaeosmilia fraterna and Kueichouphyllum sinense; Brachiopods Gigantoproductus edelburgensis, G. submaxims, G. manchouriensis, Sermiplanus rhipidoformis and Eomarginifera safasa.
Age
Depositional setting
It is interpreted as littoral-neritic sediments.
Additional Information