Lava 10 : The term used for magma once it has erupted onto the Earth's surface. (Teacher's Packet). Molten rock that erupts from a vent or fissure. (Gardner, et.al., 1995). See also: Magma
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}