Definition of volcanic glass in English:

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volcanic glass


Another term for obsidian.
Example sentences
  • Detrital grains of quartz, altered feldspars, laumontite, chlorite, volcanic glass shards and rock fragments make up 5-45% of this horizon.
  • Zeolite minerals are diagenetic products formed from the breakdown of volcanic glass and minerals by fluids circulating through the rocks.
  • They result from nonequilibrium crystallization from the devitrification of volcanic glass, which is postulated to occur at relatively high temperatures following compaction and welding of a hot rhyolitic ash flow.

For editors and proofreaders

Syllabification: vol·can·ic glass

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