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Glen Canyon
Glen Canyon is a canyon that is located in southeastern and south central Utah and northwestern Arizona within the Vermilion Cliffs area. An immense area located north of the Grand Canyon, it too was carved by the Colorado River.
A reservoir, Lake Powell, was created by the Glen Canyon Dam in 1963, flooding much of Glen Canyon. Lake Powell emerged from a struggle over damming Dinosaur National Monument. The Sierra Club and its leader, David Brower, were instrumental in blocking the dam in Dinosaur, ignoring Glen Canyon in the process. Before Glen Canyon was flooded, but after the struggle in Congress, Brower floated the canyon and realized what a tremendous resource it was. This experience transformed Brower's attitude towards environmental preservation, making him more radical and less likely to compromise. It was very similar to the experience of John Muir with the Hetch Hetchy Reservoir. For Brower, it steeled him for the battle over a dam in the Grand Canyon. Beginning in the late 1990s, the Sierra Club and other organizations renewed the call to drain Lake Powell in Lower Glen Canyon. Edward Abbey documented his experience exploring Glen Canyon from the Colorado River prior to the completion of Glen Canyon Dam in his memoir Desert Solitaire in the chapter titled Down the River.
==Pre-dam history and rescue archaeology==
Around 1956, archaeologists and biologists from the University of Utah and the Museum of Northern Arizona, using National Park research grants, planned an emergency excavation of Lower Glen Canyon, which was soon to be flooded by the new Glen Canyon Dam. Between 1958 and 1960, four investigative phases, combined with other surveys prior to 1957, discovered 250 sites. Beginning in 1958, the Lower Glen Canyon survey was finished.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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