Image: Dioritoid qapf
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Description: This images shows the QAPF (quartz, Alkali feldspars, plagioclase feldspars, and feldspathoids) diagram used to classify coarse-grained igneous rock. The dioritoid (dioritic-rock) fields are highlighted in yellow, while the true diorite field is highlighted in red. Dioritoids/diorite are further distiguished from gabbroids/gabbro by their predominantly sodic plagioclase (An<50).
Title: Dioritoid qapf
Credit: Own work
Author: Kent G. Budge
Usage Terms: Creative Commons Zero, Public Domain Dedication
License: CC0
License Link: http://creativecommons.org/publicdomain/zero/1.0/deed.en
Attribution Required?: No
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