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Sawatch Uplift : ウィキペディア英語版 | Sawatch Uplift The Sawatch Uplift 〔The place name "Sawatch" is pronounced . This name derives from the Ute language noun "''sawup''" meaning "sand dunes". The Spanish language version of this name is usually spelled "Saguache", while the English language version is usually spelled "Sawatch".〕 is a prominent geologic anticline in the Rocky Mountains in central Colorado in the United States. It was formed as a bulge in the North American Plate approximately 70–65 MYA during the Laramide orogeny that created the modern Rocky Mountains. The uplift runs north-south for several hundred miles from central Colorado into northern New Mexico. The Sawatch Range and Mosquito Range were both formed as part of the uplift. Approximately 35 MYA, stresses in the continental plate in the center of the uplift caused the center to collapse, forming a trough between the Sawatch and Mosquito Range that is part of the larger Rio Grande Rift. The trough runs southward from Leadville, CO into New Mexico. The northern part of the rift forms the headwater valley of the Arkansas River. ==References==
*''Roadside Geology of Colorado'', Halka Chronic (1980).
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「Sawatch Uplift」の詳細全文を読む
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