pyroclastic


py·ro·clas·tic

P0687600 (pī′rō-klăs′tĭk)adj. Composed chiefly of rock fragments or particles of volcanic origin, such as pumice, obsidian, or volcanic ash.

pyroclastic

(ˌpaɪrəʊˈklæstɪk) adj (Geological Science) (of rocks) formed from the solid fragments ejected during a volcanic eruption

py•ro•clas•tic

(ˌpaɪ rəˈklæs tɪk)

adj. composed chiefly of volcanic rock fragments, as agglomerate or tuff. [1885–90]
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