Devil's Backbone is a dike, a vertical sheet of andesite magma that solidified in a fracture where it wedged apart some of the lava flows that made up Mount Mazama. This unusually thick dike once fed extensive lava flows on its flank of the volcano. It is more resistant to erosion than the adjacent lava flows of the caldera walls and thus stands out as a giant rib.

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Comments (3)

Alex-from-Moscow on October 11, 2007

Nice shot! I like mountains.

VKeith on October 11, 2007

Thank you, Alexy! Me too!

George Coppens on September 30, 2009

Pretty rough 'n tough territory. Excellent shot! Greetings from Amsterdam, Neth.

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Photo details

  • Uploaded on October 11, 2007
  • © All Rights Reserved
    by VKeith