File:Grand Canyon National Park- Toroweap Formation 0941 (7706887970).jpg

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A detail of the soft, sometimes colorful slope that is the Toroweap Formation in Grand Canyon National Park. NPS Photo by Kristen M. Caldon

Toroweap Formation: thickness: 130-375 ft.

The Toroweap Formation, a mixture of shales, sandstones, and limestones, forms the first slope below the rim of the canyon.

It was deposited 273 million years ago, during the Paleozoic Era- Late Early Permian Period. This formation, with its variable rocks, marks the return of the sea to the Grand Canyon region. Both transgressions and regressions occurred during deposition.

The Toroweap Formation was thus deposited in everything from shallow marine and intertidal to coastal dune environments.
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Source Grand Canyon National Park- Toroweap Formation_0941
Author Grand Canyon National Park

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This image was originally posted to Flickr by Grand Canyon NPS at https://flickr.com/photos/50693818@N08/7706887970. It was reviewed on 20 April 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

20 April 2020

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current18:25, 20 April 2020Thumbnail for version as of 18:25, 20 April 20202,592 × 3,872 (2.59 MB)Killarnee (talk | contribs)Transferred from Flickr via #flickr2commons

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