Volcanic

Description

Igneous 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

vulcânica (Port.); volcanique (Fr.)

Authority

Submitted information Comment: José Delgado Rodrigues, LNEC, 2009.

Volcanic

Description

Synonyms and Related Terms

Authority

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Volcanic

Description

Synonyms and Related Terms

Authority

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