Volcanic glass definitions

Volcanic glass

1) Volcanic rock
Found on https://www.crosswordclues.com/clue/volcanic-glass

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Volcanic glass

Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma. Like all types of glass, it is a state of matter intermediate between the close-packed, highly ordered array of a crystal and the highly disordered array of gas. Volcanic glass can refer to the interstitial, or matrix material in an aphanitic (fine grained) volcanic...
Found on http://en.wikipedia.org/wiki/Volcanic_glass

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volcanic glass

any glassy rock formed from lava or magma that has a chemical composition close to that of granite (quartz plus alkali feldspar). Such molten ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/v/33

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volcanic glass

Another name for obsidian.
Found on http://www.encyclo.co.uk/local/22290

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volcanic glass

See lava glass.
Found on http://www.encyclo.co.uk/visitor-contributions.php

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volcanic glass

[n] - a kind of natural glass produced when molten lava cools very rapidly
Found on http://www.webdictionary.co.uk/definition.php?query=volcanic%20glass

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volcanic glass

volcanic glass A natural glass produced by the cooling of molten lava, or a liquid fraction of it, too rapidly to permit crystallization. Examples are obsidian, pitchstone, tachylyte, and the glassy mesostasis of many extrusive rocks.
Found on http://www.wordinfo.info/words/index/info/view_unit/2322/

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volcanic glass

noun a kind of natural glass produced when molten lava cools very rapidly
Found on https://www.encyclo.co.uk/local/20974

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