ignimbrite

By surface analysis, igni- (“fire”) +‎ Latin imbris (“shower; stormcloud”) +‎ -ite.

• (UK) IPA^(key): /ˈɪɡnɪmbɹʌɪt/

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ignimbrite (countable and uncountable, plural ignimbrites)

1. (geology) A deposit left by a pyroclastic flow from a volcano, consisting of ash, pumice lapilli, and lithic fragments. [from 20th c.]
   • 2004, Richard Fortey, The Earth, Folio Society, published 2011, page 13:

     The walls of the houses and shops and temples were often constructed of alternating courses of large blocks of ignimbrite and small, sienna-coloured Roman bricks.

• ignimbritic

• igneous rock