The collision of a meteorite in what is now Arizona left an indelible mark: Meteor Crater. At nearly the same time, a massive landslide blocked the Colorado River, creating a temporary lake in the ...
View from the Grand Canyon's South Rim onto Nankoweap Delta. Remnants of a past natural dam created by a landslide are visible on the far side of the Colorado River, just to the left of the dry bed of ...
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