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Mid-Atlantic Flatwoods

Ecoregion in Atlantic Coastal Plain in NC, VA

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The Mid-Atlantic Flatwoods ecoregion is a broad plain composed of middle-elevation terraces, sandy ridges, and broad, shallow valleys. Evergreen shrub bogs or “pocosins” are characteristic and are found on flat, poorly-drained uplands between major streams. Elevations range from 0 to 100 feet (0-30 m) and local relief is less than 30 feet (9 m). Dissection and elevation are generally less than ecoregions to the west and many streams meander widely. Drainage is often restricted and Aquults are the most extensive soils; they are a contrast to the better drained Udults that are common on the Rolling Coastal Plain (65m) (Buol, 1973, U.S. Soil Conservation Service, 1981b). Streams have high values of dissolved organic carbon and are more acidic than those of the Piedmont (45) and the Southeastern Plains (65) especially during low flow events (Markewich and others, 1990).

— EPA

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