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Deposited Permian Period (245 to 286 million years ago)
Depositional Environment Shallow seas and coastal plains
Appearance Ledgy slopes with brown sandstones.
Examples Confluence of the Green and Colorado rivers and in Cataract Canyon.
CANCEL
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Did You Know?At Spanish Bottom on the Colorado River, scientists discovered 260 feet of sediment below the water's surface. This could make Cataract Canyon one of the most actively filling canyons in the world.more...
Last Updated: July 01, 2011 at 09:33 MST