Excerpts from: U. S. National Park Service Website - Geology Fieldnotes: Grand Teton National Park, Wyoming, April 2000 [Return to America's Volcanic Past - States and Regions ] [Return to America's Volcanic Past - National Parks and Monuments ] [Return to Visit A Volcano Menu ] America's Volcanic Past - Great Smoky Mountains National Park, North Carolina and Tennessee View the Geologic Time Scale MORE America's Volcanic Past - Appalachian Mountains MORE America's Volcanic Past - North Carolina MORE America's Volcanic Past - Tennessee MORE America's Volcanic Past - Blue Ridge Parkway and the Shenandoah National Park Learn More About Plate Tectonics Select VOLCANIC HIGHLIGHTS and FEATURES: Appalachian Mountains: 1 Geologists tell us that sections of huge plates forming the crust of the earth have collided violently on numerous occasions in the past.
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