Difference between revisions of "Volcanic"
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Revision as of 13:25, 27 April 2013
Description
Igneous rock extrusive rock formed at the Earth's surface and having aphanitic structure. Volcanic rock is emitted by a volcano, which is an opening, or rupture, in a planet's surface or crust that allows hot magma, ash and gases to escape from below the surface.
Synonyms and Related Terms
vulcnica (Port.); volcanique (Fr.)
Authority
- Submitted information, Submitted information Comment: Jos Delgado Rodrigues, LNEC, 2009.