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Lookout Mountain District


Appalachian Highlands Major Division

Appalachian Plateau Province

Cumberland Plateau Section

Lookout Mountain District

The Lookout Mountain District is composed of two nearly flat-topped mountains, Lookout-Pigeon and Sand Mountains, separated by Lookout Valley. The mountains are capped by Rockcastle Sandstone of Pennsylvanian age, and the valley is underlain by Chickamauga Limestone of Ordovician age. The upland slopes gently to the southwest from a maximum elevation of 2200 feet near Durham to an elevation of 2000 feet near the Alabama-Georgia border. The northwestern margin of Lookout Mountain and the southeastern margin of Sand Mountain are marked by a continuous escarpment that drops abruptly 1000-1200 feet to Lookout Valley. Elevations in Lookout Valley vary from 800-1000 feet. The escarpment on the southeastern side of Lookout-Pigeon Mountain, the district and province boundary, drops abruptly 800-1000 feet to the Chickamauga Valley District. These escarpments are breached by numerous small streams which have their source on top of the upland and reach the valleys through deep notches in the cliffs.

Source: William Z. Clark, Jr. and Arnold C. Zisa, Physiographic Map of Georgia (Atlanta: Georgia Department of Natural Resources, 1976).