Petrography and Origin of Miliolite Limestone of Western Saurashtra Coast

The Miliolite Limestone of the Western Saurashtra coast consists of a succession of mostly high-energy calcarinites, calcirudites, coquinoid bands, and minor carbonate-mud. Petrographic examination of these rocks shows that the sediments were formed under shallow, warm, agitated waters of tropical sea shores. These are mainly calcareous beach deposits which have been cemented by secondary calcium carbonate precipitated from sea water which was saturated with it. There were minor variations in the beach environment which are reflected in the associated sediments. The occurrence of these rocks over the Tertiary coastal plains and in the interior of the Deccan Trap country indicates a higher stand of the sea during Pleistocene time than at present.