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Wednesday, March 28, 2018

By river, ocean, or wind, rocks round the same way

https://ift.tt/eA8V8J River rocks tend to be rounded, as do grains of dune sand and beach glass. Geophysicist Douglas Jerolmack of the University of Pennsylvania led a team in showing that all of these types of particles acquire a curved shape in a similar manner. The finding may help scientists understand how floodplains are built and predict when ash or dust clouds are likely to form.

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