Abstract

The of Kerala (southwest India), a potential modern analogue of an ancient hydrocarbon-generating environment, are in nearshore shallow water about 10 m deep. Individual banks extend over an area of 25 sq km or more. They are characterized by rapidly accumulating fine-grained silty clay sediments, high organic matter, oxygen-deficient bottom waters, and dense mud suspensions. The muds are thixotropic, and the sedimentary environment suggests conditions suitable for gas generation within the sediments. It is proposed tentatively that thixotropic and gas-generation properties of the sediments, with the waves, keep the mud in suspension and result in the spectacular wave-damping property of the mud banks.

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