A low height, a geologic boundary with interior regions, an ocean on one side, and rich soil are the primary characteristics of coastal plains.
This is further explained below.
Generally, The Coastal Plain is a large expanse of relatively flat territory that extends southward from Piedmont and borders the Atlantic Ocean. The Fall Line separates this region from Piedmont and the distinctive traits that it has helped to identify it as a different geographical area from Piedmont. The Coastal Plain is the biggest and most southern area in the state of Georgia.
In conclusion, Low height, a geologic boundary with interior regions, an ocean on one side, and good soil are the defining characteristics of coastal plains.
Read more about Georgia's coastal zone.
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