摘要：The western Gangdese in Tibet during Triassic was previously considered to be a part of the Gangdese Oldland (Zhao ZZ et al., 2001; Fig. 1). If the Gangdese Oldland did exist, it means no prospect of petroleum exploration of the Triassic strata in western Gangdese area. Fortunately, the recent biostratigraphic progresses don’t support the existence of the Gangdese Oldland. This paper aims to briefly introduce the new paleogeographic interpretation and the reason that the western Gangdese in the Triassic was marine instead of terrigenous on the basis of the recent conodont data.
