Golmudhe Fm
Type Locality and Naming
The type section is located at Dagangou, 40 km south of Golmud, Qinghai. It was named by Wang Zengji in 1931.
Lithology and Thickness
Sandstone and Limestone. Lower part is sandstone interbedded with thin-layered limestone. Upper part consists of brecciated limestone, shale, fine-grained sandstone and limestone, intercalated with volcanic rock and coal seams. Thickness 463 m.
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Dagangou Fm
Upper contact
Conformable contact with the overlying Nuomuhonghe Fm
Regional extent
At places such as Guanjiaoya River at the south slope of Burhan Budai Mt., the formation is composed of dark-gray extremely thick-bedded limestone and thick-bedded pebbled quartzose sandstone, containing fusulinid Fusulina sp., 98−800 m thick. On the east slope of Chagaketeli, Dulan County, it is 319 m thick, and in unconformable contact with the underlying Dagangou Fm. The quartzose sandstone lenses at Nanshan Mt., Xiaxitai, Dulan County yield plants Neuropteris gigantea, etc.
GeoJSON
Fossils
Lower part contain Fusulinids Fusulina sp., Fusulinella sp., Pseudostaffella sp., Protriticites sp., etc. as well as corals, brachiopods, etc.
Elsewhere, Fusulind Fusulina sp., and plant Neuropteris gigantea, etc.
Age
Depositional setting
It is interpreted as a littoral facies
Additional Information