THE CONODONT SEQUENCE AND A MIDDLE-CARBONIFEROUS BOUNDARY IN THE MIDDLE TIANSHAN MOUNTAINS, XINJIANG

In Xinjiang, the Arqialehe Carboniferous section of the Boluoheluo Mountain is an important and representative one for the Carboniferous strata in the Middle Tianshan Mountains. Based mainly on brachiopods, corals and fusutinids, Yang Shi-fu first divided the Carboniferous section in detail, and the Middle-Carboniferous boundary in this region has been debated for a long time (Table 1).