A pyroclastic rock; (also) a pyroclastic rock fragment. Cf. pyroclast, n.
| 单词 | θ5730 | 
| 释义 | the world > the earth > structure of the earth > constituent materials > rock > igneous rock > 			[noun]		 > volcanic rocks > volcaniclastic (5)		 pyroclastic1896 A pyroclastic rock; (also) a pyroclastic rock fragment. Cf. pyroclast, n. volcaniclastics1970 In plural. Volcaniclastic rocks or deposits. Subcategories:— 			fragment			(1)		 — 			varieties of			(2)		  | 
	
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