Maximum elevation along its western margin is only a few hundred feet. Broad cuestas occur where differential erosion has etch the gently dipping strata of the Coastal Plain.
Drainage systems are typically dendritic except in areas underlain by carbonate.
A brief overview of Miocene lithostratigraphy - Northern Florida and Eastern Georgia. Here the plain was deeply incised during lower sea level. Roy L. Ingram and others, Southeastern Geology, Vol. Separates the Appalachians from the Ouachitas.