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In the 1980s, the Institute of Geology, Chinese Academy of Geological Sciences (IGCAGS) sent an expedition to the area north of the Qilian Mountains to study the local terrestrial Permian and Triassic
In the 1980s, the Institute of Geology, Chinese Academy of Geological Sciences (IGCAGS) sent an expedition to the area north of the Qilian Mountains to study the local terrestrial Permian and Triassic