Carbonate Lumps in the Lawson's Bay Area, Visakhapatnam, East Coast of India

72-74Modern carbonate lumps are found in the Lawson's Bay area. The carbonate lumps are inferred to have been deposited by biochemical process in the littoral zone. Abundant high Mg-calcite with subordinate aragonite and dolomite are the minerals in the carbonates. Aragonite and dolomite are considered to have been formed by the diagenetic alteration of high Mg-calcite. Amphiroa fragilissima and Chaetomorpha sp. are the dominant algal forms present in the carbonates. No direct evidence on the age of carbonates in the bay could be obtained