dacite(redirected from Dacite rock)
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A fine-grained light gray volcanic rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
an igneous, volcanic rock characteristically light in colour with relatively high silica content
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||dacite - a grey volcanic rock containing plagioclase and quartz and other crystalline minerals|
volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth
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