Lithostratigraphy of the Neogene-Quaternary Deposits of Dwarka-Okha Area, Gujarat

A formal lithostratigraphic classification is suggested for the Neogene-Quaternary sediments of the Dwarka-Okha (Okhamandal) area. They are classified into three formations viz., Gaj, Dwarka, and Chaya. The Gaj Formation is divided into Ashapura Clay Member and Ranjitpur Limestone Member, and it ranges from Lower to Middle Miocene in age. The disconformably overlying Dwarka Formation is of Middle Miocene to Lower Pliocene age and divisible into three members viz., Positra Limestone, Shankhodhar Sand-Clay and Kalyanpur Limestone. The Quaternary deposits unconformably overlie this unit and are classified into Chaya Formation that consists of Okha Shell Limestone and Aramda Reef Members. These are Middle to Upper Pleistocene in age.