Over the thousands of millennia it took to create the full effect the water slowly but inexorably made the corridors of the canyons deeper and steeper. The hard edges of the rock were inevitably worn down and formed the flowing shapes on the rock face. So it was not the work of mighty and ancient Navajo spirits (perhaps…) but of the sheer tenacious persistence of the elements.
(image credit: Flickr user brentbat)
From the Upcoming ueue, submitted by taliesyn30.