Specimen 1 - yep, it's porphrytic andesite all right photo

Bernard Sanden | all galleries >> Arizona Geology >> Superstition Geology - The Flatiron > Specimen 1 - yep, it's porphrytic andesite all right

Olympus C-50Z
1/400s f/5.6 at 7.8mm iso80 full exif

other sizes: small medium original auto

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