An Unusual Arch

February 08, 2021


Photographer: Stan Wagon
Summary Author: Stan Wagon

There are many different types of geologic arch. Shown above is a waterfall arch, which directly contradicts the classic arch definition of a curved structure that gains strength from the curve. Uniquely, this one consists of a straight row of discrete cubic forms and has had enough strength to stand for perhaps ten thousand years. This particular cobblestone structure is made of Salt Wash Sandstone, part of the Morrison formation and is located in Arches National Park. Photo taken April 22, 2018.

Photo Details: Camera: SONY ILCE-6500; Software: Adobe Photoshop Elements 13.0 (Macintosh); Lens: E 16-70mm F4 ZA OSS; Exposure Time: 0.0016s (1/640); Aperture: ƒ/20.0; ISO equivalent: 800; Focal Length (35mm): 24