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volcaniclastic

[vol-kan-i-klas-tik]
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adjective Geology.
  1. pyroclastic.
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Also vol·can·o·clas·tic [vol-kan-uh-klas-tik] /vɒlˌkæn əˈklæs tɪk/.

Origin of volcaniclastic

1960–65; blend of volcanic and clastic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018