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Late Quaternary Glacial Sequence on the South Slope of the Lenglongling, Qilian Mountains

Kang Jiancheng (Polar Research Institute of China, Shanghai) Zhu Junjie and Chen Hongkai (Dept of Geography, Lanzhou University)  
During late Quaternary two glaciations on the south slope of Lenglongling, Qilian Mountains are recognized. The first main glacier advancing occurred before 140 000 a B.P. in the form of piedmont glacier. The second, i.e, the last glaciation, there were two glacier advancings occurred separately before 38000 a B.P., and between 38000-18000 a B.P.. Among 14 000-12 660 a B.P., a short-term stop occurred in the deglacial process. During the last glaciation, the glacier types were wide-tail valley glacier, valley glacier and cirque glacier; the depression of snowline was about 600 m lower than today. Based on the date from 14C dating, research of geomorphical stratigraphy and loess stratigraphy, there was no "large ice sheet" claimed by M. Kuhle, formed in this studing area during late Quaternary.
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