Ancient buried canyon discovered in Tibet

November 24, 2014 5:03 PM

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A very old and very deep canyon lies alongside the Yarlung Tsangpo River in southern Tibet, near the eastern end of the Himalayas, and its recent discovery is prompting geologists to rethink a popular model currently used to explain how the gorges of the Himalayas came to form so quickly and steeply.

Reporting in the journal Science, researchers from Caltech and the China Earthquake Administration say the paleocanyon is several thousand feet deep in some places and is "now buried under more than [1,600 feet] of sediments." By drilling from several sites along the gorge, they measured two isotope...

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