Rock group	Igneous
Classification	Extrusive/volcanic
Composition	Intermediate
Texture	Aphanitic Porphyritic
Intrusive counterpart	Diorite
Common minerals	Plagioclase feldspar Pyroxene Hornblende

Andesite in Hand Sample

Campus andesite from El Paso, TX
Porphyritic andesite
Porphyritic andesite from the summit of Mt. Kilimanjaro
Porphyritic andesite from the Crazy Mountains, MT
Beartooth andesite

Andesite in Thin Section

Thin Section GigaPans

Porphyritic andesite, plane polars
Porphyritic andesite, crossed polars