Pupuga Fm

It was named by Wang Yigang, Sun Dongli, He Guoxiong in 1980. The naming section is located in between the No. 10 and No. 11 Maintenance Squads of the Dingri-Nyalam Highway, Tibet Autonomous Region, with its reference section being situated on the southern slope of the Nieniexiongla Mts, Nyalam County, Tibet Autonomous Region.

Synonym: （普普嘎组）; Pusela Fm (?? – as cited in Triassic lexicon)

Lower part represents alternating layers of grey-white medium-bedded quartz-sandstones together with dark-grey sandy limestones, oolitic limestones and shelly limestones, intercalated with a small amount of microcrystalline limestones. Middle part is composed of grey-black thin-, and medium-bedded granulitic limestones, intercalated with microcrystalline limestones. Upper part is composed of grey-black thin-, and medium-bedded oolitic limestones, microcrystalline limestones and bioclastic limestones, intercalated with lime quartz-sandstone lenses. It is 62.7 m in thickness.

In the area of Nieniexiongla region it yields bivalve fossils such as Astarte delicata, A. cf. elegans, A. cf. subminima, Camptonectes (C.) sp., Weyla ambongoensis, Nuculana (Praesaccella) canelorum, Neocrassina (N.) cf. oblique, Eomiodon zanganyicensis, Anisocardia (A.) triangularis, Gramatodon renyanus, Gervillela ginggahaensis, Eopecten inaequistriatus, Entolium cf. rotumdum and Pseudolimea duplicata; and Foraminifera fossils such as Cyclorbitopsella tibetica, Orbitopsella dubari, Aulotortus amylovoluta, A. chilingchiangensis. In the area south of Menbu it yields ammonites fossils as represented by Psiloceras sp., Arietites rotiformis.