Changme Fm
Type Locality and Naming
The type section is located in the Changme Village 20 km to the south of the Longlin County Town, Guangxi. It was named by You Jiarong in 1982.
Lithology and Thickness
Limestone. Light-grey and grey massive limestones, intercalated with algal limestone. Thickness is 50-70 m.
Relationships and Distribution
Lower contact
Conformable contact with the light-grey limestone of the underlying Maping Fm.
Upper contact
Conformable contact with the grey limestone of the overlying Qixia Fm.
Regional extent
Distributed in the alignment of Ceheng-Ziyun- and-Wangmo areas.
GeoJSON
Fossils
Fusulinida fossils such as Misellina, Robustoschwagerina, Parafusulina and Pseudofusulina, etc.. Corals represented by Iranophyllum, Wetzellophyllum, etc.
Age
Depositional setting
It is interpreted as platformal-margin facies.
Additional Information
The boundaries of the formation are determined mainly on the basis of biologic fossils, since lithologically the formation is difficult to be differentiated from both its neighboring overlying and underlying rock formations, so it actually belongs to the known Houziguan Limestone.