Double Arch
by Suzanne Stout
Title
Double Arch
Artist
Suzanne Stout
Medium
Photograph - Digital Photography
Description
Double Arch is a close-set pair of natural arches, one of the more known features of Arches National Park in Utah. From the Double Arch parking area it's a 0.5 mile (0.8 km) round trip to the arches. There are no guardrails or fences to prevent visitors from exploring directly beneath and through the arches.
The area was used as a backdrop for the opening scene of Indiana Jones and the Last Crusade, in which the arches are briefly visible. However, the cave shown in the movie does not exist.
Double Arch was formed differently from most of the arches in Arches National Park. It is what is known as a pothole arch. It formed by water erosion from above rather than more typical erosion from the side. The larger opening has a span of 148 feet (45 m) and a height of 104 feet (32 m). These dimensions give the arch the tallest opening and second longest span in the park.
Arches National Park lies above an underground evaporite layer or salt bed, which is the main cause of the formation of the arches, spires, balanced rocks, sandstone fins, and eroded monoliths in the area. This salt bed is thousands of feet thick in places, and was deposited in the Paradox Basin of the Colorado Plateau some 300 million years ago when a sea flowed into the region and eventually evaporated.
Uploaded
May 9th, 2018
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