Extinct Volcano 1 : A volcano that is not expected to erupt again. (Teacher's Packet). A volcano that is not presently erupting and is not likely to do so for a very long time in the future. (Foxworthy and Hill, 1982)
U.S. Department of the Interior, U.S. Geological Survey, US Geological Society (USGS), Glossary of Volcano and Related Terminology, USGS/Cascades Volcano Observatory, Vancouver, Washington, USA 2006. http://vulcan.wr.usgs.gov/Glossary/volcano_termino logy.html, (ND/ Volc Sci - Amer) {493}