SIA0315: Agate Bridge, Petrified Forest

Photographer:Calvin J. Hamilton
Copyright:© 2003 Calvin J. Hamilton
Location:Petrified Forest, Arizona

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Centuries of scouring flood waters washed out the arroyo, or gully, beneath this 110-foot (34 meter) petrified log to form Agate Bridge. The stone log, harder than the sandstone around it, resisted erosion and remained suspended as the softer rock beneath it washed away.

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