The World Heritage Yosemite National Park, on the west slope of the central Sierra Nevada Mountains, is an area of outstanding scenic beauty and great wilderness value. The park represents practically all the different environments found within the Sierra Nevada, including sequoia groves, historic resources, evidence of Indian habitation, and domes, valleys, polished granites and other geological features illustrating the formation of the mountain range.
Continent: North America
Country: United States of America
Category: Natural
Criterion: (VII)(VIII)
Date of Inscription: 1984
The Granite Park
The park is dominated by the Sierra Nevada, which is a tilted granite area. Granite underlies most of the park and is exposed as domes, partial domes, knobs and cliffs. There is exceptionally glaciated topography over most of the area including the spectacular Yosemite Valley, a 914 m deep cleft carved by glaciers through a gently rolling upland. The valley is a widened portion of the prevailing narrow Merced River canyon which traverses the southern sector of the park from east to west. The massive sheer granite walls present a freshly glaciated appearance with little postglacial erosion. The park is known for its many waterfalls, including the Yosemite Falls and Ribbon Falls, and some 300 lakes, including Emerald and Merced. Other notable canyons in the park are the Grand Canyon of the Tuolumne River and the Tenaya Canyon.There are also two major rivers (Merced and Tuolumne). The area was previously heavily glaciated and, although no glaciers are still existent in the park, the marks of their passing are everywhere. Glacial action combined with the granitic bedrock has resulted in unique and pronounced landform features. These include distinctive polished dome structures as well as the related glacial features of hanging valleys, tarns, moraines and U-shaped valleys. Monolithic granitic blocks such as Half Dome and the perpendicular wall of El Capitan are classic distinctive reflections of the geological history of the area.
Yosemite National Park |
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