Anorthoclase Photos Roger Weller, geology instructor
wellerr@cochise.edu
copyright
2010-R.Weller
anorthoclase crystal-3
Mt. Erebus, Antarctica
Mt. Erebus is the only active volcano in
Antarctica.
It is a young volcano (less than a million years old) with a lava lake.
These anorthoclase feldspar crystals are tossed out of the volcano during
eruptions.
Size of crystal is about 7 centimeters.

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Photo is copyright free only for
non-commercial educational uses.
Credit photo to Kimberley Stineburg/Cochise College.