Geology
The Western Continental Margin is a passive margin having six sedimentary basins namely Kutch, Saurashtra, Bombay Offshore, Konkan, Lakshadweep and Kerala. Out of the six basins Bombay Offshore is the biggest basin having an aerial extent of 1,20,000 km2. Bombay Offshore basin which is an intracratonic basin, is the southern extension of Cambay basin and encompasses the Gulf of Cambay and adjacent shelf part of the Arabian sea. It came into existence during Upper Cretaceous time as a result of faulting in the Deccan trap basement. This basin is divided into several tectonic units such as Cambay Gulf Shelf to the north followed to the south by Dahanu depression, Bombay Ratnagiri shelf occuyping central and southern part of the basin and Western clastic basin fringing Bombay Ratnagiri shelf.
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