File:De Chelly Sandstone (Lower Permian; Canyon de Chelly, Arizona, USA) 20.jpg

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English: Sandstones in the Permian of Arizona, USA.

The walls of this Arizona canyon consist of Permian-aged De Chelly Sandstone (pronounced "De Shay"). Most of the unit is horizontally-bedded and cross-bedded quartzose sandstones representing ancient sand sheets and desert sand dunes. A vast sand dune "sea" was present at the time - such an environment is called an "erg" (a modern example is northern Africa's Sahara Desert). The reddish-brown coloration is from hematite (iron oxide, Fe2O3). Dark-colored desert varnish partially covers many cliff faces. The canyon floor is moderately lush with greenery and has some agricultural plots.

Stratigraphy: De Chelly Sandstone, Leonardian Stage, Lower Permian

Locality: view from Mummy Cave overlook, "Canyon del Muerto" (= Canyon of the Dead), Canyon de Chelly National Monument, northeastern Arizona, USA
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Source https://www.flickr.com/photos/47445767@N05/51958243894/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51958243894. It was reviewed on 25 March 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

25 March 2022

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current20:30, 24 March 2022Thumbnail for version as of 20:30, 24 March 20222,000 × 3,008 (5.78 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51958243894/ with UploadWizard

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