Strangely Shaped Dunes Stay Stable Through 'Birthing'

Crescent-shaped sand dunes known as barchans occur in vast dune fields that have puzzled geologists because their size stays stable. A new model suggests this could result from the way large dunes 'birth' small dunes.



via LiveScience.com http://www.livescience.com/39308-dunes-stay-stable-through-birthing.html