what region was covered by the Atlantic Ocean and currently makes up around 60% of Georgia’s land

The region covered by the Atlantic Ocean in the past, which currently makes up around 60% of Georgia's land, is the Coastal Plain. The Coastal Plain is a low-lying, flat region that stretches along Georgia's coastline and extends inland for several miles. It consists of sandy beaches, marshy areas, and fertile farmland.

The region that was covered by the Atlantic Ocean and currently makes up around 60% of Georgia's land is the Coastal Plain.