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Related to felsite: Felsitic Texture
A fine-grained, light-colored igneous rock, composed chiefly of feldspar and quartz.
fel·sit′ic (-sĭt′ĭk) adj.
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.
(Geological Science) any fine-grained igneous rock consisting essentially of quartz and feldspar
[C18: fels(par) + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a dense fine-grained igneous rock consisting typically of feldspar and quartz, both of which may appear as phenocrysts.
fel•sit•ic (fɛlˈsɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.