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GEOGRAPHICAL RESEARCH >

1993 , Vol. 12 >Issue 1: 94 - 100

DOI: https://doi.org/10.11821/yj1993010013

THE INVOLUTONS AND THEIR PALAEOCLIMATIC SIGNIFICANCE IN THE NACHI TAI REGION ALONG, THE QINGHAI-XIZANG HIGHWAY

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  • 1. Lanzhou Jinstitute of Glaciology and Geoyology, Chinese Academy of Sciences;
    2. 906 Hydrogeological and Engineering Geologic Brigade, Ministry of geology and Minerals, China

Received date: 1989-12-28

  Revised date: 1991-03-18

  Online published: 1993-03-15

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Abstract

There are a lot of involutions in the IV-I terraces of the Kunlun River and its main branches. The time that formed involutions may he divided into two periods as follows:The latest period of Pleistocene (20725-14041Y.B.P.) and the middle period of Halocene (about 3000Y.B.P.). It means that continuous permafrost was developed at the latest period of Pleistocene and annual air temperature was 5-6℃ lower at that time than at present,and that isolated peemafrost was developed at the middle period of Holocene and annual air temperature was 2.5-3.9℃ lower at that time than at present in this region.The loess and blown sard accumulation continuously indicate that the climate was drier since the latest period of Pleistocene than at present in this region.

Key words： involutions; distribution; formation; palaeoclimatic significance

Cite this article

Wang Shading, Bian Chunyu . THE INVOLUTONS AND THEIR PALAEOCLIMATIC SIGNIFICANCE IN THE NACHI TAI REGION ALONG, THE QINGHAI-XIZANG HIGHWAY[J]. GEOGRAPHICAL RESEARCH, 1993 , 12(1) : 94 -100 . DOI: 10.11821/yj1993010013

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