vitrophyre
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English
[edit]Pronunciation
[edit]Noun
[edit]vitrophyre (countable and uncountable, plural vitrophyres)
- A porphyritic variety of volcanic glass.
- 1986, Eric H. Christiansen, The Geology and Geochemistry of Cenozoic Topaz Rhyolites, page 5:
- The compositions of felsites and vitrophyres are similar but felsites have higher K/Na ratios than their corresponding vitrophyres.