Silent Effigy - Photo and Comment by Brad Goldpaint
Double Arch in Southern Utah, was formed differently than most arches in the Arches National Park. It is what is known as a pothole arch, formed by water erosion from above rather than more typical erosion from the side. The larger opening has a span of 148 feet and a height of 104 feet. It lies atop an underground salt bed called the “Paradox Formation” which is responsible for the arches. The visible rock formation is the salmon-colored Entrada Sandstone and the tan-colored Navajo Sandstone.
Wow.