volcanic rock

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Noun 1. [画像:volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth]volcanic 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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
These volcanics are a group that includes different volcanic materials such as Incesu ignimbrite and Seksenverentepe volcanite. And they are defined as the following by Turkish General Directorate of Mineral Research and Exploration: Grey, red, black coloured; well-welded; locally found column decompositoned ignimbrites which are found in the working area, prevalently in the east of Himmetdede, Erkilet and Argaeus Mountains, are named Incesu ignimbrite by Pasquare (1968).
Volcanites, which are composed of gray, dull pink coloured trakibasaltic lava with large phenocrystal and pyroclastics, are named as Seksenverentepe volcanite by Donmez and others (2003).
In 1840, Emergence Of Dental Journal reporting developments in material such as volcanite, porcelain has lead to clinical and scientific research for new improved materials such as--colloid crowns, Gutta Percha, Aluminum, barium and iridium found their place in dentistry [1].
Scope of biomaterials in conservative dentistry and endodontics

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