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

Poornendu P. Singh ¹, Indra Bir Singh ¹

Affiliations
1 Department of Geology, Lucknow University, Lucknow-226 007, IN

Abstract

Silty sandstone beds in Bhuj Formation show predominantly large-scale cross-bedding showing herring-bone structure with rippled interbeds. A well-preserved large-scale cross-bedded unit shows distinct bundle structures which are interpreted as Lidal bundles. These tidal bundles are arranged in thin bundles of neap and thick bundles of spring cycle of a tidal rhythm. Bundle boundaries of neap cycle often show doublemud drapes. Presence of tidal bundles, double mud drapes, and neap-spring cycle within a single cross-bedded unit indicate significant role of tides during deposition of Bhuj Sandstone, and points to a tide-dominated coastal area as a site of deposition for Bhuj Sandstone.

Keywords

Sedimentology, Bhuj Sandstone, Cretaceous, Kachchh, Gujarat.

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