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Authors
Affiliations
1 Wadia Institute of Himalayan Geology, Dehradun-248001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 43, No 5 (1994), Pagination: 603-611
Abstract
Sediment build up, structure and geomorphic setting of alluvial fans can serve as good clues for the reconstruction of Quaternary events in a region where they are located. Alluvial fans assume greater importance especially in young orogenic belts like the Himalaya where there has been an interplay of rapid uplift and global climatic change during the Pleistocene. In this paper an attempt has been made to study the genesis of a small relict debris fan in the upper Spiti valley in the Tet hys Himalaya (H.P.) and to elucidate its sedimentational style in local climatic and tectonic set up. The fan has been essentially constructed by debris flows and subordinate stream deposits during seasonal melting and episodic events of the late Quaternary. While climate remained much the same local tectonic activity leading to upliftment of the fan and diversion of the feeder channel ceased further accretion of the fan beyond its present size. Minor warmer climatic oscillations within the main cool phase are observed.
Keywords
Spiti Valley, Geomorphology, Himachal Pradesh.
