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随着晚第三纪到第四纪青藏高原的强烈隆升,在其腹地可可西里山和唐古拉山西段引发了大规模的陆相火山喷发,这是青藏高原形成和演化史上的一次重要地质事件。这次火山活动发生在晚第三纪末期或第四纪初期,其影响范围于东经88°30′—92°30′、北纬33°00′8—36°00′之间,面积约12万平方公里。在火山岩堆积区形成了以乌兰乌拉湖为中心的江河源头高山平原湖沼群。
With the intense uplift of the Qinghai-Tibet Plateau from the Late Tertiary to Quaternary, large-scale continental volcanic eruptions were triggered in the hinterland of the Hoh Xil Mountains and the western part of the Tangula Mountains. This is an important geological event in the formation and evolution of the Qinghai-Tibet Plateau. The volcanic activity occurred at the end of the late Tertiary or early Quaternary, and its scope of influence ranged from 88 ° 30’-92 ° 30’E and 33 ° 00’8-36 ° 00N, covering an area of about 120,000 Sq km. In the volcanic rock accumulation area, the source group of alpine plains and lakes with Wulanla Lake as the center is formed.