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Penn geophysicist teams with mathematicians to describe how river rocks round

A new study by the University of Pennsylvania’s Douglas Jerolmack, working with mathematicians at Budapest University of Technology and Economics, have found that rocks follow a distinct pattern as they become rounder, and then smaller, as they travel down riverbeds.

Fuente : http://www.eurekalert.org/pub_releases/2014-02/uop…

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