hyaloclastite en · NOUN
Etymology
From hyalo- + clast + -ite.
Meanings
-
(countable, uncountable) A 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:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| hyaloclastites | Number=Plur | lexicographic |