phonolite
noun
pho·no·lite
ˈfō-nə-ˌlīt 
: a gray or green volcanic rock consisting essentially of orthoclase and nepheline
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Now, Tenerife hasn't produced another eruption like this since, but a paper by Ablay and others (1995) suggested that there could be more of the explosive phonolite magma lurking underneath the caldera.
—
Erik Klemetti,
Discover Magazine,
29 Apr. 2016
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Erik Klemetti,
Discover Magazine,
29 Apr. 2016
Cite this Entry
“Phonolite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phonolite. Accessed 6 Jul. 2026.
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