Sedimentary Structures in the Tertiary Rocks of South Gujarat and Their Environmental Significance

Planar cross stratification, trough cross stratification, imbricate structure and channel structure observed in Jhagadia, Babaguru and Tarakeshwar Formations indicate fluvial depositional environment. Oscillation ripple marks preserved in the Kand Formation suggest transitional conditions. Graded bedding seen in Jhagadia, Tarakeshwar and Vagalkhod Formations indicate deposition by turbidity currents. Convolute laminations and ball and pillow structure by sediments belonging to Babaguru Formation indicate intrastratal deformation and slumping, perhaps on a delta. Colour banding observed in the sandstones of the Babaguru Formation suggests oxidising environment in a tranquil water body.