Volcano 06 : Natural Disaster. A vent (opening) in the surface of the Earth through which magma erupts; it is also the landform that is constructed by the erupted material. (Teacher's Packet)
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}
County of Humboldt, Volcano Ash Contingency Plan to the Emergency Operations Plan, Glossary, Humboldt Operational Area, Humboldt County Sheriffs Office, Office of Emergency Services, Eureka, CA, USA 2014. http://humboldtgov.org/DocumentCenter/View/6209, (ND/ Volc Emr - Amer) {965}