File:Carnegie Quarry Sandstone (Morrison Formation, Upper Jurassic; Carnegie Quarry, Dinosaur National Monument, Utah, USA) (48878906227).jpg

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The Upper Jurassic Morrison Formation is widely distributed in many western American states. The unit consists of fluvial (river/floodplain) and lacustrine (lake) deposits. Dinosaur bones and dinosaur tracks are moderately common in Morrison Formation sediments. Exceptionally dinosaur-rich localities include Como Bluff in Wyoming, Dinosaur National Monument in Utah, Dinosaur Ridge in Colorado, and the Cleveland-Lloyd Quarry in Utah.

Seen here is the famous Carnegie Quarry Sandstone, a horizon in the Morrison Formation that yields an abundance of dinosaur bones. The matrix ranges from sandstone to pebbly sandstone to granulestone to almost a conglomerate, but the pebbles are dominantly angular to subangular in shape. Many granules and pebbles are composed of dark-colored chert.

Stratigraphy: Carnegie Quarry Sandstone, Brushy Basin Member, Morrison Formation, Kimmeridgian Stage, Upper Jurassic, ~150 to 156 Ma

Locality: Carnegie Quarry, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA

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 Taken on 8 June 2012, 16:07
Source Carnegie Quarry Sandstone (Morrison Formation, Upper Jurassic; Carnegie Quarry, Dinosaur National Monument, Utah, USA)
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@N05/48878906227 (archive). It was reviewed on 13 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 October 2019

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current17:12, 13 October 2019Thumbnail for version as of 17:12, 13 October 20194,000 × 2,559 (9.87 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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