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青藏高原的隆起是亚洲新生代以来最重大的地质事件。约从中二叠纪晚期开始,古地中海从青藏地区自北向南逐步撤出,至始新世中期,由于喜马拉雅运动,西藏地区全部露出海面并隆起成陆。但是,直到第四纪的中更新世,大高原面貌才基本形成。从而,整个自然地理环境,在短暂的地质时期内,从昔日低海拔的热带、亚热带气候,发展至今“世界屋脊”的高寒大陆性气候,经历了举世注目的变化。
The uplift of the Qinghai-Tibet Plateau is the most significant geological event since Cenozoic in Asia. From about the late Middle Permian period, the ancient Mediterranean gradually evacuated from north to south from the Qinghai-Tibet region. From the middle of the Eocene to the middle of the Eocene, due to the Himalayan movement, all the Tibet region exposed the sea surface and uplifted into a land. However, until the middle Pleistocene of the Quaternary period, the appearance of the Great High Plateau was basically formed. Thus, throughout the natural and geographical environment, in the short geologic period, the cold continental climate developed from the former low-altitude tropical and subtropical climate to the present “roof of the world” has experienced world-wide changes.