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Published online 16 September 2003 | Nature | doi:10.1038/news030915-3
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Grand Canyon born on East coast
Uranium-dating reveals origin of western US sandstone.
Like many of their tourist visitors, some of the rocks that make up the Grand Canyon came across North America from the East Coast, a new study reveals1.
Until now, the origin of the sands that covered approximately 350,000 square kilometers of the western United States and solidified into sandstone between 150 million and 300 million years ago has been a mystery.
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