Danlin Fm
Type Locality and Naming
The type section is located in a gully, 1.5 km west of Danlin Village on the northern slope of Hou’ershan Mt., about 10 km east of the Dushan County seat, Guizhou Province. It was named by Wang Yu et al in 1964.
Lithology and Thickness
Sandstone. The lithology is grayish-white medium-bedded quartz sandstone, partly intercalated with black thin-bedded calcareous siltstone. The base of the formation is a thin bed of conglomerate. The formation is 191 m in thickness.
Relationships and Distribution
Lower contact
The base of the formation is a thin bed of conglomerate disconformably separating it from the underlying Silurian Wengxiang Group.
Upper contact
Conformably overlain by the Suijiaping Fm, which has a bed of pebbly sandstone near its base.
Regional extent
The formation is distributed in Dushan of southern Guizhou and in Hezhang of northwestern Guizhou.
GeoJSON
Fossils
It contains spores, solecodonts, chitinozoans, a few small-sized brachiopods and plant ?Psilophyton, Hostimella, Taeniocrada.
Age
Depositional setting
It is interpreted as deposits of littoral facies.
Additional Information
An earlier version of this Lexicon entry said that the Mangshan Fm quartz sandstone in Duyun (Yue Senxun, 1929) and Wudang Fm near Guiyang City (Devonian Research Team, Chinese Academy of Geological Sciences, 1965, unpublished paper) are partly equivalent to Danlin Fm. However, revised chart by Hongfei Hou (Apr 2021) now completely separates these – Danlin Fm is mid-Emsian, and the others are upper Eifelian and lower Givetian.