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

A. T. Rao ¹, K. V. S. Acharyulu ¹, K. Sanyasi Rao ¹

Affiliations
1 Department of Geology, Andhra University, Waltair, IN

Abstract

No Abstract.

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T. Ramamohana Rao ¹, Ch. Shanmukha Rao ¹, K. Sanyasi Rao ¹

Affiliations
1 Geology Department, Andhra University, Waltair 530003, IN

Abstract

Textural analysis reveals that the black sand samples are well sorted. negatively skewed, mostly mesokurtic and unimodal in distribution with the Mean Size of the grains falling mostly within the fine sand. The opaques and non-opaque heavies in a weighted average sample constitute 78.1% and represent the full range of minerals found in the rocks of the Eastern Ghats. The marked preference of a particular heavy mineral to a certain sieve fraction can be related to the grain size of the heavy mineral in the source rocks. The occurrence of thin layers of black sand in the stream channels inland. the non-disappearance of any unstable heavy mineral in the deposits, suggest that the black sands are derived from the highland area.

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