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Gregory Bald : ウィキペディア英語版 | Gregory Bald
Gregory Bald is a mountain in the Great Smoky Mountains. It has an elevation of 4,949 feet (1,508 meters) above sea level. The mountain's majestic summit makes it a popular hiking destination. Another feature that attracts many visitors are the flame azaleas that bloom over the bald every summer. The azaleas reach peak bloom around mid-to-late June. Gregory Bald is located along the Tennessee-North Carolina border, between Blount County and Swain County. It rises appx. 3,000 feet above its northern base in Cades Cove, and appx. 3,300 feet above its southern base at Fontana Lake. The mountain is located entirely within the Great Smoky Mountains National Park. Gregory Bald is a type of mountain known as a grassy bald. Unlike most summits in the Appalachians, which are heavily forested or culminate in jagged peaks, grassy balds are covered by a thick layer of wild grass. Trees and other foliage are sparse. How and why a summit develops into a grassy bald is unknown. While there is evidence that Gregory Bald was a natural grassy bald, the National Park Service must currently work to prevent the summit from becoming forested.〔Durwood Dunn, ''Cades Cove: The Life and Death of an Appalachian Community'' (Knoxville: University of Tennessee Press, 1988), 33.〕 ==Geology== Gregory Bald is composed of a precambrian rock known as Elkmont sandstone.〔Harry Moore, ''A Roadside Guide to the Geology of the Great Smoky Mountains National Park'' (Knoxville: University of Tennessee Press, 1988), 150.〕 In a few places atop the mountain, sandstone ruts actually erupt through the thick grass. The Elkmont sandstone is part of the Ocoee Supergroup, which was formed from ancient ocean sediments between 500 million and one billion years ago. Gregory Bald, along with most mountains in the area, was formed appx. 200 million years ago during the Appalachian orogeny.〔Harry Moore, ''A Roadside Guide to the Geology of the Great Smoky Mountains National Park'' (Knoxville: University of Tennessee Press, 1988), 26-27.〕
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