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National Park ServiceHistoric South Pass Wyoming used by emigrants and Pony Riders alike.
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Cerro Rendija is a shield volcano  

Did You Know?
Cerro Rendija volcano, just west of Big Tubes in El Malpais National Monument, is a good example of a shield volcano. Low viscosity lava spread out rapidly from the vent and kept the volcano from gaining much vertical height.
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Last Updated: July 25, 2006 at 00:23 EST