The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...
Ever since he first visited the canyon on a geology field trip in 2010, Matthew Morriss has wanted to find out. Now completing his Ph.D., in geology at the University of Oregon, Morriss has discovered ...
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