Guohua Fm
Type Locality and Naming
It was named by the district investigation team of Guangxi Geological Bureau in 1974. The named section is located in An Ning Tun, Guohua Township, Pingguo County, Guangxi.
Synonym:
Lithology and Thickness
Lower unit is tuff, dolomite, and oolitic tuff with a small amount of tuff, over which are tuff, mudstripe tuff, mud dolomite, and porous dolomite with a thin layer of mudstripe tuff, locally with tuff. In the lower unit, micro-stratigraphy, banded laminations, worm-like structures and sutures are developed. Upper unit is mainly flint-bearing agglomerate tuff, particulate tuff, and mudstripe tuff with a small amount of dolomite or dolomitic tuff. The thickness is 1057-1395 m.
Relationships and Distribution
Lower contact
At the bottom, the bean-like tuff is in consolidated contact with the underlying Beisi Fm
Upper contact
At the top, the tuff and oolitic tuff are also in consolidated contact with the overlying Hekou Fm sandstone.
Regional extent
Only distributed in Guangxi Pingguo County, Guohua, Debao County, Duojing, Guliu and other places.
GeoJSON
Fossils
Bivalves: Entolium sp., Neoschizodus sp., Promyalina sp., Unionites sp., Polygyrina sp., Posidonia sp., Chlamys sp.
Age
Depositional setting
This group is semi-closed shallow water sediment.
Additional Information