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Photo Gallery: Plate Tectonics
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Photo: Raplee Ridge in Utah
Photo: Virunga mountainsPhoto: Hot lava at Mount EtnaPhoto: Thingvellir National Park in IcelandPhoto: Offset streams at Carrizo PlainPhoto: Bighorn Basin in WyomingPhoto: Raplee Ridge in UtahPhoto: Tubeworms in Atlantic OceanPhoto: Mineral chimneys off MexicoPhoto: Andes Mountain peaksPhoto: Volcano crater in EthiopiaPhoto: Lake Natron in TanzaniaPhoto: Danakil Depression in EthiopiaPhoto: Satellite image of Persian GulfPhoto: Mosque and farms in Eritrea
ENLARGE
Raplee Ridge, part of the Monument Upwarp in southeastern Utah, is a long, narrow, folded anticline that formed about 70 million to 50 million years ago.
Photograph by Michael Collier

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