Before the Mississippi, minerals show ancient rivers flowed west | Science News

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Before the Mississippi, minerals show ancient rivers flowed west

Michigan zircons uncover path of ancient river system across North America

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9:31am, June 7, 2010

Like vacationers taking a pit stop on a long road trip, zircon mineral grains from the northern Appalachians may have stopped off in Michigan before ending up on the Colorado Plateau, a new study suggests. The finding, reported in the June Geology, is a major boost to the notion that a continent-spanning, Amazon-like river system once carried sediments west across North America.

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