Delicate Arch

April 16, 2011

: Nel Graham
Summary Authors: Nel Graham; Jim Foster

The photo above showing a facade of sandstone adorned with naturally carved gargoyle-like figures was taken in Arches National Park, Utah. Delicate Arch (at left center) is the centerpiece of the park and composed of Entrada Sandstone. This area of Utah is part of the Colorado Plateau -- much of the rock here is Jurassic-age Navajo Sandstone. During the Mesozoic Era, what is now southern Utah was part of a giant sand sea, which in terms of extent rivaled the current day Sahara Desert. Rocks are tinted shades of red/orange due to the presence of iron oxide in the form of hematite -- common rust. Photo taken in July of 2006.

Photo Details: Camera: OLYMPUS C3100Z,C3020Z; Focal Length: 19.1mm; Aperture: f/6.3; Exposure Time: 0.0031 s (1/320); ISO equiv: 100.