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

By river, ocean or wind, rocks round the same way 04/03/2018 03:25 PM EDT 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. Full story at https://penntoday.upenn.edu/news/river-ocean-or-wind-rocks-round-same-way Source University of Pennsylvania This is an NSF News From the Field item. Follow NSF:  This email was sent using GovDelivery Communications Cloud on behalf of: National Science Foundation Update · 2415 Eisenhower Avenue, Alexandria, VA 22314 · 703-292-5111