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USGS/Cascades Volcano Observatory, Vancouver, Washington

America's Volcanic Past -
National Parks and Monuments


"Though few people in the United States may actually experience an erupting volcano, the evidence for earlier volcanism is preserved in many rocks of North America. Features seen in volcanic rocks only hours old are also present in ancient volcanic rocks, both at the surface and buried beneath younger deposits. " -- Excerpt from: Brantley, 1994

Regions
National Parks and Monuments


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URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
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If you have questions or comments please contact: <GS-CVO-WEB@usgs.gov>
09/08/04, Lyn Topinka