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

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A Study of Pebble Deformation in the Precambrian Rocks of Singhbhum District, Bihar


Affiliations
1 Department of Geology, Presidency College, Calcutta, India
     

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The deformed pebbles in the conglomerate show a large variation in the orientation of their longest axes as well as in the values of the axial ratios a' and b'. This has been interpreted as due to a nonspherical nature of the original pebbles. The effect of deformation has been separated from the effect of the original shape. It has been shown that a superficial analysis of the shape of deformed pebbles may give a wrong idea about the state of strain in the rocks, and the method by which the true amount of strain can be computed from dc:formed pebbles has been discussed.
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  • A Study of Pebble Deformation in the Precambrian Rocks of Singhbhum District, Bihar

Abstract Views: 189  |  PDF Views: 2

Authors

D. Mukhopadhyay
Department of Geology, Presidency College, Calcutta, India
S. Bhattacharya
Department of Geology, Presidency College, Calcutta, India

Abstract


The deformed pebbles in the conglomerate show a large variation in the orientation of their longest axes as well as in the values of the axial ratios a' and b'. This has been interpreted as due to a nonspherical nature of the original pebbles. The effect of deformation has been separated from the effect of the original shape. It has been shown that a superficial analysis of the shape of deformed pebbles may give a wrong idea about the state of strain in the rocks, and the method by which the true amount of strain can be computed from dc:formed pebbles has been discussed.