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Ancient Hohokam spiral petroglyphs decorate a basalt boulder on Shaw Butte, in Phoenix, Arizona.

   Spiral petroglyphs on a boulder are among a set of ancient Hohokam ruins high up on Shaw Butte.  This mountain -- part of the -- is at the north end of 7th Avenue, in Central Phoenix.
   This set of ruins is thought to have been a prehistoric solar observatory, and it has a commanding view of the valley below.
   Next View >>
   See the GeoHistory page if you want to know more about why the landscape looks the way it does, or return to the map of "The Rocks of the Valley of the Sun" for more view locations.
   You can also send this as an E-Postcard to your friends!

  This is view number 3 of 5 scenes from the Shaw Butte area, in Phoenix, Arizona.
  You can read my short GeoStory™ about some prehistoric ruins on this butte, in "Rooms with a View".  It is a PDF version, so you can print it off easily.
  There are more GeoStories available, too.

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