volcanic rock

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Related to Igneous volcanic rock: Extrusive rocks
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.volcanic rock - extrusive igneous rock solidified near or on the surface of the Earthvolcanic rock - extrusive igneous rock solidified near or on the surface of the Earth
agglomerate - volcanic rock consisting of large fragments fused together
amygdaloid - volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits
dacite - a grey volcanic rock containing plagioclase and quartz and other crystalline minerals
basalt - the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene
volcanic glass - a kind of natural glass produced when molten lava cools very rapidly
lava - rock that in its molten form (as magma) issues from volcanos; lava is what magma is called when it reaches the surface
tuff, tufa - hard volcanic rock composed of compacted volcanic ash
igneous rock - rock formed by the solidification of molten magma
References in periodicals archive ?
Rhyolite, on the other hand, is only malleable when heated, becoming a variety of igneous volcanic rock.
Negotiating both the outer oak and inner designer glass doors revealed a plug of igneous volcanic rock, exposed as a feature in the entrance hall.
According to a study in the journal (https://www.nature.com/articles/nature24488) Nature , the team found a "critical compositional tipping point" in the melted form of the igneous volcanic rocks, known as rhyolite, that determines how vicious the magma becomes, which in turn dictates how violently it erupts to the surface as lava.