(UUID : 72bebd77-cf97-4286-a4be-21a950a3cc5e)
Rock
Porphyritic granite
I-040
Rock
igneous rock
It is a siliceous plutonic rock composed of quartz, feldspar, and mica. It shows a porphyritic texture in which feldspar appears as coarse-grained phenocrysts and quartz and plagioclase appear as medium- to fine-grained stone tools. It can be subdivided by the type of colored mineral.
10.2
cm
Quartz, Sanidine, Oligoclase, Biotite, Amphibole
#igneous rock
United States
Minnesota
St. Cloud
Department of Geology and Geophysics, Kangwon National University
+82-33-250-8550
Geology and Exhibition Hall
DOI
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2024-09-05