Sawatch Uplift
Template:Short description The Sawatch Uplift Template:IPAc-en[1][2] 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 about Template:Convert in central Colorado. 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 the upper Arkansas River graben. This is a trough between the Sawatch and Mosquito Range that is part of the larger Rio Grande Rift. The trough runs southward from Leadville, CO to the San Luis basin. The upper Arkansas Graben forms the headwater valley of the Arkansas River.[3]
References
- Roadside Geology of Colorado, Halka Chronic (1980).
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- ↑ The place name "Sawatch" is pronounced Template:IPAc-en. This name derives from the Ute language noun "sawup" Template:IPAc-en meaning "sand dunes". The Spanish language version of this name is usually spelled "Saguache", while the English language version is usually spelled "Sawatch".
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