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

G. T. Thong ¹, B .v. Rao ¹

Affiliations
1 Department of Geology, Nagaland University, Kohima - 797 002, IN

Abstract

The Disang sediments of Botsa constitute a flysch facies of Upper Cretaceous - Eocene age. They comprise a thick sequence of splintery shales with intercalations of thin, flaggy sandstones/siltstones of greywacke composition. These are recycled sediments of a mixed source, including igneous and low rank metamorphics, where Semi-Humid climatic conditions prevailed and moderate intracrustal differentiation processes took place. These chemically mature sediments were deposited at plate interiors, in an exogeosynclinal setup, along a passive continental margin. This was a marine environment where low ventilation and Eh conditions prevailed.

Keywords

Geochemistry, Depositional Environments, Disang Sandstones, Botsa, Nagaland, Ne India.

Full Text