North America’s deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new addition to the Earth’s ancient landscape. A recent study suggests that a monumental shift in Snake river drainage around 2.1 million years ago reshaped the topography, carving out Hells Canyon, which plunges an astonishing 2,400 m, significantly deeper than the Grand Canyon.
Cave records show that US’s deepest river gorge Hells Canyon is only 2.1 million years old
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