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Journal of Lanzhou University(Natural Sciences)
0455-2059
1979 Issue 2
qing zuo gao yuan gong lu yan xian duo nian dong tu mou xie biao zhi te zheng
The periglacial feature indicators of permanent ground along theHighway in South Qinghai and North Xizang are:patterned ground;sand-wedges;cryoplanationterraces;pingo scars;as well as rock glaciers;freezing hummocks andground ice. The identification of permafrost indicators has shown that the firstpermafrost was formed during the late glaciation period and the secondwas formed during tbe Holocene period when the climate graduallybecame cold.
..............page:113-122
he cheng mna zhong de yi xie wen ti
Yin Jungchun
..............page:53-56