The Piedmont bioregion comprises the piedmont areas of Virginia, North Carolina, South Carolina and northern Georgia as defined by the principals of bioregionalism.
Natural history
Erosion of the piedmont plateau created iron-oxide rich clay soils. Three general landforms exist. Flat ridges, Hillsides and, Floodplains. Each landform has its own Ecology.
References
Piedmont bioregion Wikipedia(Text) CC BY-SA