From: Petrological characteristics and volatile content of magma of the 1979, 1989, and 2014 eruptions of Nakadake, Aso volcano, Japan
Sample ID
I141129S01
I141129S02
I141129S03
Phenocryst
37
35
39
Plagioclase
22
28
31
Olivine
2
Clinopyroxene
13
5
6
Fe–Ti oxide
< 1
0
Groundmass
63
65
61
Porosity
77
50
Glass in groundmass
90
3