Guzi Fm

The type section is lies from Shaogang Village to Manze, Kangmar County, Tibet. It was named by Liang Dingyi and Wang Weiping in 1983.

Claystone and Limestone. A suite of epimetamorphosed clastic rock formation. Lower part is a spotted slate−fine-grained schist member. Around Guzi Village, it is composed of black spotted silty slate intercalated with clayey limestone, yielding crinoid stem Cyclocyclicus sp. and worm trail fossils. Northward to the granite rock body, it turns to mica quartz schist, garnet mica schist intercalated with marble or amphibole-schist, etc. In the vicinity of Canlu, a layer of quartz schist is contacted with the underlying marble by scouring. Thickness 200−300 m. Upper part is a limestone−marble member. It consists of several layers of thick-bedded limestone intercalated with black spotted slate around Guzi. Northward, the number of limestone layers decreases while the thickness increases. In the vicinity of Manzai, it turns to banded sand-bearing marble, locally with schist. The formation is 230−380 m thick

Crinoid stem Cyclocyclicus sp. and worm trail fossils are in Lower part.