Image: Basalt qapf
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Description: This is an image of the QAPF diagram used to classify volcanic rocks when the modal mineralogy can be determined. The basalt/andesite field is highlighted in yellow. Basalt has SiO2 < 52% while andesite has SiO2 > 52%.
Title: Basalt 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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