Ocotillo Wells California SVRA

Wind-blown sand is a highly effective agent of abrasion, as anyone who has been in a sandstorm will agree. Wind is one of the few agents that can and does carry material uphill grains, the finer sand being the lightest, are deposited on the top; the larger,
heavier grains collect at the bottom. The wind can carries sand for miles before piling it up into this huge dune. Perhaps the most popular spot in the park, Blow Sand Hill is illuminated by a circle of headlights on many weekend nights.