Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

K. C. Prashra ¹, Des Raj ¹

Affiliations
1 Geological Survey of India, SCO 98-99-100, Sector 17-C, Chandigarh 160 017, IN

Abstract

The reported fossil assemblage, when integrated together with earlier known fossils, indicates an age range of Permian to middle Jurassic for the Tandi Group. The deposition of the Tandi Group over the Precambrian rocks represents a major Permian (Djulfian) transgression in the area from Kashmir-Bhallesh-Charnba region, whereafter deposition in the area continued till Jurassic.

Keywords

Permo-Triassic, Tandi Group, Lahaul Himalaya, Palaeogeography, Palaeontology.

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K. C. Prashra ¹, S. Dasgupta ²

Affiliations
1 306 F, Sector 7A, Chandigarh - 160019, IN
2 129. D. J. Road, Bhadrakali, Hooghly (W.B.) - 712232, IN

Abstract

The Miyar glacier is a 28 km. long valley-type galcier with a number of transverse tributary glaciers, encompassing an area of about 110 sq. km of ice and snow in its basin. It has retreated by about 325 m between 1963 and 1983 with an average annual retreat of about 16 m. This phenomenon is comparable with similar recessionery trends of other galciers of Lahaul, which indicates deglaciation period still prevalent in this part of the Himalaya.

Keywords

Glaciology, Geomorphology, Lahaul- Spiti, Himachal Pradesh.

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K. C. Prashra ¹

Affiliations
1 Geological Survey of India, S.C.O. 98-100, Sector 17 C, Chandigargh-160017, IN

Abstract

Two levels of glacial erratics of granitic rocks located at about 280m and 1250m above the present river level have been identified in the Higher Himalayan region of Lahaul, Himachal Pradesh, which may possibly correspond to advancing and waning phases of the valley glacier. The erratics have been transported over a distance of about 4 km to 28 km from their respective provenances. The appreciable difference in altitude between the two levels of erratics and that of the present river course suggests a considerable uplift of this part of the Himalaya during the Quaternary period.

Keywords

Geomorphology, Pleistocene Glaciation, Erratics, Himalaya, Himachal Pradesh.

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U. Bose ¹, S. C. Nagal ², N. L. Sharma ², K. C. Prashra ², V. K. Sharma ², U. K. Bassi ²

Affiliations
1 4/193, SFS, Mansarovar, Jaipur - 302 020, IN
2 S.C.O. 98-100, Sector 17-C, Chandigarh-160 017, IN

Abstract

Pyroclastics are found in all the late Proterozoic clastic formations of the Outer Krol Belt in the Simla Himalaya. The field and petrographic characters leading to identification of the pyroclastics are described here.

Keywords

Petrology, Pyroclastics, Late Proterozoic, Simla Himalaya.

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