These three MLRAs have elevations less than 25 m giving rise to poorly drained soils. Soils to the west of MLRA 153A, for the most part, occur in MLRA 133A, the Southern Coastal Plain, a component of the South Atlantic and Gulf Slope Cash Crops, Forest, and Livestock Region. MLRA 153A consists of level lowlands interspersed with swamps, estuaries, and lagoons. The soils are poorly drained and have minimal local relief.
Slopes are long and have low gradients across broad interfluves.
Texture of the marine and fluvial sediment parent material is variable. Soils are acidic and have low base saturation. Histosols are common in closed depressions and in large swampy areas. In northern Florida and southern Georgia, MLRA 153A extends inland from the seacoast as much as 175 km, but the width of the remainder of the belt typically ranges from 50 to 75 km. Natural vegetation is pine-oak forest.