leucitite


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Related to leucitite: Leucite rock

leucitite

[′lü·sə‚tīt]
(petrology)
A fine-grained or porphyritic extrusive rock or hypabyssal igneous rock composed mostly of pyroxene and leucite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The rock types found at Monte Somma/Vesuvius are largely leucitites and phonolites, both of which are high-soda volcanic rocks.