西昆仑山南坡广大地区内有一套浅变质岩系,为长期争论的哑地层。1982年开展1:100万区调,十三处发现化石,确定该浅变质岩系为中—晚三叠世,从而为昆仑山和喀喇昆仑山两大地层分区的界线找到了依据;为“特提斯海”的北界的划分提供了佐证。 In the vast area of ​​the southern slope of the western Kunlun Mountains, there is a set of shallow metamorphic rocks, which is a dull formation that has long been debated. In 1982, a 1: 1 million zone adjustment was carried out, thirteen fossils were found, and the shallow metamorphic rocks were identified as mid-late Triassic, thus finding the basis for the boundaries between the Kunlun Mountains and the Karakorum Mountains. The division of the northern boundary of Tethys provides evidence.