volcanic glass
noun
: natural glass produced by the cooling of molten lava too rapidly to permit crystallization
Examples of volcanic glass in a Sentence
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Large plagioclase feldspar crystals can be seen below the hornblende, all embedded in a matrix of volcanic glass and feldspar crystals.
—
Erik Klemetti, Discover Magazine, 25 Mar. 2025
The observatory warned that the plume may include hazards, including strands of volcanic glass known as Pele's hair and rock fragments called tephra.
—Kerry Breen
june 20, CBS News, 20 June 2025
While obsidian from multiple locations was present, volcanic glass collected from Sierra de Pachuca was prized above all others.
—Rosie McCall, Discover Magazine, 12 May 2025
Obsidian is a black volcanic glass; deposits found here were historically used by Indigenous peoples to craft tools.
—Tom Howarth, Newsweek, 20 Jan. 2025
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Erik Klemetti, Discover Magazine, 25 Mar. 2025
The observatory warned that the plume may include hazards, including strands of volcanic glass known as Pele's hair and rock fragments called tephra.
—Kerry Breen
june 20, CBS News, 20 June 2025
While obsidian from multiple locations was present, volcanic glass collected from Sierra de Pachuca was prized above all others.
—Rosie McCall, Discover Magazine, 12 May 2025
Obsidian is a black volcanic glass; deposits found here were historically used by Indigenous peoples to craft tools.
—Tom Howarth, Newsweek, 20 Jan. 2025
See All Example Sentences for volcanic glass
Cite this Entry
“Volcanic glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanic%20glass. Accessed 9 Jul. 2025.
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