31. During each cyclothem, the land was flooded, allowing the accumulation of marine deposits such as shale, limestone and sandstone. 32. The maximum depth of the bay is about 4.75 m and its bottom is made of regional marine deposits . 33. The estuarine plain is level to nearly level and consists of fine fluvial-marine deposits over sandy layers with marine shells. 34. This is the age of " marine deposits of the North East coast of South Africa are of this age. 35. The badly weathered remains were discovered in marine deposits near Ariyalur in the state of Tamil Nadu in South India. 36. The river deposits from the east have been progressively overlaying the marine deposits further west, as the shore line receded. 37. The fluvial marine deposits are usually saline at depths of approximately 1 metre and includes depresses areas along the Bicol River. 38. Subsequently, once the ice has retreated sufficiently, marine deposits may be laid down, depending on the water depth at the ice front. 39. The fossil was found in the Middle Eocene Drazinda Formation, a marine deposit which has also preserved the remains of archaeocete whales. 40. The basin type resulting from this subsidence is called a back-arc basin and is usually filled by shallow marine deposits and molasse.