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