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Bytownite
triclinic
a calcium rich member of the plagioclase solid solution series of feldspar minerals.
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Rhomb
pophyry
A volcanic rock with gray-white large porphyritic rhombus-shaped phenocrysts of feldspar.
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Latite
aphyric
An igneous, volcanic rock, with aphanitic-aphyric to aphyric-porphyritic texture.
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Pumicite
vesicular
a volcanic rock that consists of highly vesicular rough-textured volcanic glass.
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Batholith
plutonic
A large mass of intrusive igneous rock made mostly of felsic or intermediate rock types.
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Andesite
aphanitic
A volcanic rock of intermediate composition, between silica-poor basalt and silica-rich rhyolite.