➁➀Originally Abor Volcanics ➁Brown J Coggin, 1912, A geological reconnaissance through the Dihong valley, being the geological results of the Abor Expedition, 1911–1912. Rec. Geol. Surv. India, vol.42, 231–253, pl.1 ➂Abor in Siang district, eastern Tibet Autonomous Region ➃Consists of basalt, volcano-clastic breccia and rhyotaxitic dacite etc. It is subdivided into Luotong Member (lower) and Jiku Member (upper) ➄ Sinian-Cambrian.