File:Mowry Shale (mid-Cretaceous; Dinosaur National Monument, Utah, USA) 10 (48843529727).jpg

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Structurally tilted shales and sandstones in the Cretaceous of Utah, USA.

The low, gray-colored outcrop is the Mowry Shale in Dinosaur National Monument, Utah. The Mowry is a mid-Cretaceous unit having dark-colored siliceous shales. Upon weathering, the shale usually consists of silvery-gray chips. Fragmentary fish fossils are common in some Mowry Shale outcrops. In Wyoming and Montana, the Mowry is a significant source rock for hydrocarbons. It's been calculated that about 12 billion barrels of oil have been generated by the Mowry in the deep subsurface of those two states (see summary in Bremer, 2016).

The brown ridge of rocks behind the Mowry is the Dakota Sandstone (Lower Cretaceous).

Stratigraphy: Mowry Shale, mid-Cretaceous

Locality: Fossil Discovery Trail, western Dinosaur National Monument, northern Uintah County, northeastern Utah, USA

Reference cited:

Bremer (2016) - Stratigraphy and Sedimentology of the Cretaceous of the Cretaceous Mowry Shale in the Northern Bighorn Basin of Wyoming: Implications for Unconventional Resource Exploration and Development. M.S. thesis. University of Nebraska, Lincoln, Nebraska. 55 pp.

See info. at: <a href="https://en.wikipedia.org/wiki/Dinosaur_National_Monument" rel="noreferrer nofollow">en.wikipedia.org/wiki/Dinosaur_National_Monument</a>

Geologic map of Dinosaur National Monument:

<a href="https://pubs.usgs.gov/imap/1407/plate-1.pdf" rel="noreferrer nofollow">pubs.usgs.gov/imap/1407/plate-1.pdf</a>
Date
Source Mowry Shale (mid-Cretaceous; Dinosaur National Monument, Utah, USA) 10
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@N05/48843529727 (archive). It was reviewed on 8 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

8 October 2019

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current00:54, 8 October 2019Thumbnail for version as of 00:54, 8 October 20194,287 × 2,658 (8.82 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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