(UUID : 3bef8425-b6cc-4187-9d96-7a47318a2cbf)
Rock
Two-mica granodiorite
I-033
Rock
igneous rock
It is a neutral diagenetic rock with a SiO2 content of 60-65% and mainly composed of quartz, plagioclase, potassium feldspar, and biotite. It contains much more plagioclase than K-feldspar, and the content of K-feldspar accounts for 1/3 to 1/8 of the total feldspar. Diorite containing more than 10% of orthoclase is called granodiorite, and granodiorite characterized by biotite is called biotite granodiorite.
11.0
cm
Volcanic glass
#igneous rock
Department of Geology and Geophysics, Kangwon National University
+82-33-250-8550
Geology and Exhibition Hall
DOI
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2024-09-05