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Outcrops

Outcrops are distinguished from glades by the fact that they typically are located on strong side slopes or summits of ridgelines or mountains. They may have flat or convex faces and many also have scattered large complexes of boulders or ledge systems. Outcrops on steep side slopes may grade into cliff communities though cliffs usually are on nearly vertical slopes. The vegetation of outcrops is similar to glades in that they are dominated by herbs, graminoids, bryophytes, and lichens. Shrubs and trees are often stunted and are limited to soil pockets and cracks or to the edges. Outcrop communities as defined here primarily are found in the Cumberland and Crab Orchard Mountains, on higher ridges of the Ridge and Valley, and in the Blue Ridge. 

SOUTHWESTERN APPALACHIANS

CUMBERLAND PLATEAU ECOREGION

CUMBERLAND PLATEAU ESCARPMENT ECOREGION

CENTRAL APPALACHIANS

CUMBERLAND MOUNTAIN THRUSTBLOCK ECOREGION

RIDGE AND VALLEY

SANDSTONE RIDGES ECOREGION

BLUE RIDGE MOUNTAINS

SEDIMENTARY MOUNTAINS ECOREGION

METASEDIMENTARY MOUNTAINS ECOREGION

IGNEOUS MOUNTAINS ECOREGION

AMPHIBOLITE MOUNTAINS ECOREGION