hyaloclastite

H4Y4A1L1O1C3L1A1S1T1I1T1E1

noun

A type of volcanic rock containing glassy clasts, that is, fragments.

Scrabble 21
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Meanings

nounhyaloclastite (countable and uncountable, plural hyaloclastites)

plural hyaloclastites

  1. countableuncountablegeographyA type of volcanic rock containing glassy clasts, that is, fragments.

    Explosive cooling and the sedimentation of glassy fragments results in a rock with a characteristic speckly texture known as hyaloclastite.

    2004, Richard Fortey, The Earth, Folio Society, published 2011, page 45

Origin

From hyalo- + clast + -ite.

Full word history & related roots →
Cite this entry
APA

hyaloclastite. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/hyaloclastite

MLA

“hyaloclastite.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hyaloclastite. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “hyaloclastite,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/hyaloclastite.

Source: hyaloclastite on Wiktionary, CC BY-SA 4.0.