monzonite

[mon-zuh-nahyt]
noun
any of a group of granular igneous rocks having approximately equal amounts of orthoclase and plagioclase feldspar, intermediate in composition between syenite and diorite.

Origin:
1880–85; < German Monzonit, named after Monzoni, mountain in Tyrol; see -ite1

monzonitic [mon-zuh-nit-ik] , adjective
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World English Dictionary
monzonite (ˈmɒnzəˌnaɪt)
 
n
a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals
 
[C19: from German, named after Monzoni, Tyrolean mountain where it was found]
 
monzonitic
 
adj

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American Heritage
Science Dictionary
monzonite   (mŏn-zō'nīt', mŏn'zə-nīt')  Pronunciation Key 
An igneous rock composed chiefly of plagioclase and orthoclase, with small amounts of amphibole, pyroxene, and biotite. Monzonite contains little or no quartz.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for Monzonite
The basin area is underlain by the quartz monzonite of the boulder batholith.
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