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《Acta Geographica Sinica》 1965-01
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REMNANTS OF QUATERNARY GLACLATION ONTHE TIBETAN PLATEAU

WANG MiNG-YE CHUNG MEIN-PING(Institute of Geography, Academia Sinica)(Institute of Geologic Research, The Departmentof Geolgy)  
On the Tibetan Plateau, remnants of the quaternary glaciation are of general oc-curence. Cirques, U-shape valleys, glacial-scoured lakers, till plains, terminal moraines, and drift boulders are wide spread features down to 4200 m in altitude. The authors believe that there was once a fairly continuous ice cover on the Tibetan plateau in late pleistocene. Here after the snow-line was raised, and the glaciers retreated gradually to their present positions. The reasons are two-fold: (a) a general warming of the world climate, (b) dessication of Tibet due to further uplift. The latter is evidenced by the obvious shrinkage of many lakes on the plateau. By correlating the moraines of this glaciation with the terrace of Zi-Ling Tsangpo and Yamdrok, we reach at the conclusion that this great Ice Cover was of late pleistocene in age. Since that time the glacier retreated in three recessional stages: 1. forming Yamdrok Lake ......................................4400 m. 2. forming terminal moraines in Cano Chu Valley .................. 4650 m. 3. forming moraines on Cano-La Col..............................4950 m. Respective recessional moraines are also discovered in the valley of Drokar Chu on the northern slope of Chumulanma.
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