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British Dictionary definitions for granodiorite

granodiorite

noun
  1. a coarse-grained acid igneous rock containing almost twice as much plagioclase as orthoclase: intermediate in composition between granite and diorite

Word Origin

C19: from grano + diorite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for granodiorite

Historical Examples

  • From other areas the same materials are present plus sandstone, granite, and granodiorite.

    The Topanga Culture Final Report on Excavations, 1948

    A. E. Treganza


granodiorite in Science

granodiorite

[grăn′ə-dīə-rīt′]
  1. A coarse-grained igneous rock consisting primarily of quartz, plagioclase, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. It is the coarse-grained equivalent of dacite.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.