Talk:Volcanic plug
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Is the Devils Tower a volcanic plug? The National Park Service of the U.S. Department of the Interior wrote on its website: http://www.nps.gov/archive/deto/geology.htm
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Other theories have suggested that Devils Tower is a volcanic plug or that it is the neck of an extinct volcano (an unlikely theory, for there is no evidence of volcanic activity - volcanic ash, lava flows, or volcanic debris - anywhere in the surrounding countryside)!
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Jan D. Berends (talk) 22:37, 5 February 2008 (UTC)
