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

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Dropstones in Talchir Sediments of Palar Basin, Tamil Nadu - Implications on Depositional Conditions and Paleoclimate


Affiliations
1 Sedimentology Lab, Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, Guindy Campus, Chennai 600 025, India
     

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Recent field study of Gondwana sediments in the Palar basin near Chennai brings to light the occurrence of assorted size of boulders of extraneous source in argillaceous siltstones. These boulders are regarded as glacial in origin. It is interpreted that icebergs carried such boulders into a pro-glacial lake. Melting of the icebergs resulted in dropping of boulders into the depositional environment. The present study discusses the depositional environment and paleoclimate that prevailed during the deposition of these exotic boulders.

Keywords

Depositional Environment, Paleoclimate, Dropstones, Gondwana Sediments, Icebergs, Pro-Glacial, Palar Basin, Tamil Nadu.
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  • Dropstones in Talchir Sediments of Palar Basin, Tamil Nadu - Implications on Depositional Conditions and Paleoclimate

Abstract Views: 198  |  PDF Views: 2

Authors

S. Ramasamy
Sedimentology Lab, Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, Guindy Campus, Chennai 600 025, India
J. Madhavaraju
Sedimentology Lab, Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, Guindy Campus, Chennai 600 025, India
J. Armstrong Altrin Sam
Sedimentology Lab, Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, Guindy Campus, Chennai 600 025, India

Abstract


Recent field study of Gondwana sediments in the Palar basin near Chennai brings to light the occurrence of assorted size of boulders of extraneous source in argillaceous siltstones. These boulders are regarded as glacial in origin. It is interpreted that icebergs carried such boulders into a pro-glacial lake. Melting of the icebergs resulted in dropping of boulders into the depositional environment. The present study discusses the depositional environment and paleoclimate that prevailed during the deposition of these exotic boulders.

Keywords


Depositional Environment, Paleoclimate, Dropstones, Gondwana Sediments, Icebergs, Pro-Glacial, Palar Basin, Tamil Nadu.