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peridotite xenolith in basalt

Olivine

Pyroxene

Ca-rich Plagioclase

Ostwald ripening

quartz

orthoclase crystal

orthoclase cleavage fragment

muscovite

biotite

Amphibole

pyroxene

FELSIC INTERMEDIATE MAFIC ULTRAMAFIC

Rhyolite Andesite Basalt Komatiite

Granite Diorite Gabbro Peridotite

QUARTZ

K-FELDSPAR

Na-rich

PLAGIOCLASE

Ca-rich

AMPHIBOLE

PYROXENE

OLIVINE

100

80

60

40

20

0

% of Vol.

Si up to 77% of total Si down to 48% of total

VOLCANIC PLUTONIC

porphyritic granite

diorite

gabbro

peridotite

diamond in kimberlite

pahoehoe basalt lava flow

basaltic lava fountain

Rhyolite

obsidian

pumice

andesite (plagioclase phenocrysts)

basalt

scoria

komatiite

Granites

Granite colors