File:Entrada Sandstone (Middle Jurassic; Park Avenue, Arches National Park, Utah, USA) (37209897546).jpg

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Sandstones in the Jurassic of Utah, USA. (photo stitch by Mary Ellen St. John)

This is a view of the southern end of Park Avenue in eastern Utah's Arches National Park. The park has the highest concentration of natural arches on Earth. Examples in all stages of development are present. Most form by differential weathering and erosion of relatively thin sandstone fins (= left background).

The colorful rocks are hematite-rich quartzose sandstones and siltstones of the Entrada Sandstone, a Middle Jurassic formation. The cliff-forming unit is the Slickrock Member. The underlying unit (= thinly bedded interval near the bottom of the picture) is the Dewey Bridge Member.
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Source Entrada Sandstone (Middle Jurassic; Park Avenue, Arches National Park, Utah, USA)
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/37209897546 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 December 2019

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Date/TimeThumbnailDimensionsUserComment
current04:03, 6 December 2019Thumbnail for version as of 04:03, 6 December 20193,769 × 1,185 (2.54 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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