Ancient, fossilized “ergs” (sand seas) — now known as “Navajo Sandstone”. Taken at the Horseshoe Bend. Millions of years ago, this used to be a desert. #horseshoebend #arizona #nature #naturephotography #geology #pixel2xl #pixel2xlphotography #picoftheday #pictureoftheday #amateurphotographer #amateurphotography #photographer #photography #closeup #macroshot