<P> The Uwharries were once a coastal mountain range ; isostasy has slowly raised the eastern seabed until today they lie in the Piedmont of North Carolina over 150 miles from the coast . Formed approximately 500 million years ago by accretion along the Gondwanan tectonic plate , they are thought to have once peaked at some 20,000 feet , before eroding to a maximum of just over 1,100 ft . The range 's high point is High Rock Mountain ( 1,188 feet / 362 meters as measured by the NC Geodetic Survey ) , in southwestern Davidson County . </P>
<P> The Uwharries were once a coastal mountain range ; isostasy has slowly raised the eastern seabed until today they lie in the Piedmont of North Carolina over 150 miles from the coast . Formed approximately 500 million years ago by accretion along the Gondwanan tectonic plate , they are thought to have once peaked at some 20,000 feet , before eroding to a maximum of just over 1,100 ft . The range 's high point is High Rock Mountain ( 1,188 feet / 362 meters as measured by the NC Geodetic Survey ) , in southwestern Davidson County . </P>
how old are the uwharrie mountains in north carolina
how old are the uwharrie mountains in north carolina
approximately 500 million years ago
approximately 500 million years ago