Danshuihe Fm

It was named by the Regional Survey Party under the Tibetan Geological Bureau in 1987. The naming section is located in the area of Danshui River northeast of Duoma District, Ritu County, Tibet (E 80^o26^’, N 33^o40^’), with its reference section being situated on the western bank of the Bairebu Co to the northwest of the Cabu District, Gaize County, Tibet (E 83°10′, N 34°55′). Schematic strat column in previous "red Chinese Lexicon" suggests it is the upper formation in the Yanshiping Gr and coeval with the Bailongbinghe Fm.

Synonym: （淡水河组）

Composed of grey medium-, and thin-bedded microcrystal limestone and light-purple brecciated limestone. It is 1293.66 m thick.

In the Duoma area it yields bivalves Pleuromya cf. spitiensis, etc.; and gastropods as represented by Elegantella sp. cf., E. conoidalis, Monoplocus sp.; while in the area of the western bank of the Bairebu Co it yields coral fossils Schizosmilia rollieri, Dermoseris delogaboi, D. doblogana and Montlivaltia bifibra.