A pyroclastic rock; (also) a pyroclastic rock fragment. Cf. pyroclast, n.
单词 | θ5547 |
释义 | the world > the earth > structure of the earth > constituent materials > rock > composite rock > [noun] > fragmentary (3) pyroclastic1896 A pyroclastic rock; (also) a pyroclastic rock fragment. Cf. pyroclast, n. tuffite1925 Any composite rock which consists of a mixture of pyroclastic and sedimentary material, esp. one in which pyroclasts predominate. volcaniclastics1970 In plural. Volcaniclastic rocks or deposits. |
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