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

K. S. Subramanian ¹, L. S. Gopalakrishnan ¹

Affiliations
1 Geological Survey of India, Kerala Circle, Trivandrum 695 104, IN

Abstract

The high level plateau landforms characterised by lateritic bauxite cappings and traced at altitudes of about 2,000m in the Nilgiri and the Palni hills in the Western Ghats and in the Central Highlands of Sri Lanka, are correlatable.

The presence of Talchir sediments (Lower Gondwana) below Upper Gondwana sediments in the Palar Basin suggests that the initiation of NE-SW trending tectonic basins on the east coast was in Pre-Jurassic times. The Palar Basin evolved even before the break-up and fragmentation of the Gondwanaland, determining the configuration of the east coast of the Indian Peninsula. The Cauvery Basin, where the oldest sediments are of Upper Jurassic age, came into being in Jurassic times, consequent on the impetus provided by the rifting and fragmentation of Antarctica from the east coast of India.

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