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Southern Dissected Ridges and Knobs

Ecoregion in Appalachian Mountains in AL, GA, TN, VA

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The Southern Dissected Ridges And Knobs ecoregion is composed of broken, dissected, almost hummocky ridges. It is morphologically distinct from the sharp ridges and narrow valleys of Ecoregion 67h and underlain by interbedded sedimentary rocks including siltstones. Crestal elevation ranges from approximately 2,100 feet to 4,150 feet (640-1,265 m), and local relief varies from about 150 feet to 800 feet (46-244 m). Streams tend to be less acidic than those of Ecoregion 67h and to have storm hydrographs with higher peaks.

— EPA

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