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Photograph of Fogo eruption, looking east towards Mt. Pico by Frank Trusdell, U.S. Geological Survey, April 25, 1995.
A volcano is a vent in the surface of the Earth through which magma and
associated gases and ash erupt; also, the form or structure, usually
conical, that is produced by the ejected material.
Steve Mattox
Source of Information:
Bates, R.L., and Jackson, J.A., 1987, Glossary of geology: American Geological Institute, Alexandria, Virginia, 788 p.
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