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Mount Shasta (Karuk: ''Úytaahkoo'' or "White Mountain")〔The origin of the name "Shasta" is vague, perhaps from Russian (''Чистая'', meaning "white, clean, pure" or ''Счастье'', meaning "happiness, luck, fortune, felicity"); the name might have been given to the mountain by the early Russian settlers in California.〕 is a potentially active volcano located at the southern end of the Cascade Range in Siskiyou County, California. At , it is the second highest peak in the Cascades and the fifth highest in California. Mount Shasta has an estimated volume of which makes it the most voluminous stratovolcano in the Cascade Volcanic Arc.〔 〕〔(【引用サイトリンク】url=http://vulcan.wr.usgs.gov/Volcanoes/Shasta/description_shasta.html )〕 The mountain and its surrounding area are managed by the U.S. Forest Service, Shasta-Trinity National Forest. ==Description== Mount Shasta is not connected to any nearby mountain and dominates the northern California landscape. It rises abruptly and stands nearly above the surrounding terrain.〔 On a clear winter day snowy Mount Shasta can be seen from the floor of the Central Valley south.〔In 1878 the Coast and Geodetic Survey triangulated between heliotropes atop Mount Shasta and Mount St Helena, 192 miles south.〕 The mountain has attracted the attention of poets, authors,〔Muir, John 1838-1914. Letters, 1874-1888, of a personal nature, about Mount Shasta. In: Bade, William Frederic. The Life and Letters of John Muir. New York: Houghton Mifflin Co., 1923. Vol. II, pp. 29-41, 49-50, 82-85, 219. Two Volumes. Cited at (Mount Shasta Collection MS176 ). Retrieved 2008-04-08.〕 and presidents.〔Roosevelt, Theodore 1858-1919. Letter to Harrie Cassie Best, dated Nov. 12, 1908, White House. In: James, George Wharton 1858-1923. Harry Cassie Best: Painter of the Yosemite Valley, California Oaks, and California Mountains. 1930? p. 18. Cited at (Mount Shasta Collection MS1032 ). Retrieved 2008-04-08.〕 The mountain consists of four overlapping volcanic cones which have built a complex shape, including the main summit and the prominent satellite cone of Shastina, which has a visibly conical form. If Shastina were a separate mountain, it would rank as the fourth-highest peak of the Cascade Range (after Mount Rainier, Rainier's Liberty Cap, and Mount Shasta itself).〔 Mount Shasta's surface is relatively free of deep glacial erosion except, paradoxically, for its south side where Sargents Ridge runs parallel to the U-shaped Avalanche Gulch. This is the largest glacial valley on the volcano, although it does not presently have a glacier in it. There are seven named glaciers on Mount Shasta, with the four largest (Whitney, Bolam, Hotlum, and Wintun) radiating down from high on the main summit cone to below primarily on the north and east sides. The Whitney Glacier is the longest and the Hotlum is the most voluminous glacier in the state of California. Three of the smaller named glaciers occupy cirques near and above on the south and southeast sides, including the Watkins, Konwakiton, and Mud Creek Glaciers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mount Shasta」の詳細全文を読む スポンサード リンク
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