File:Fossil log & dinosaur bones (Morrison Formation, Upper Jurassic; Carnegie Quarry, Dinosaur National Monument, Utah, USA) 8 (48724235503).jpg
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[edit]DescriptionFossil log & dinosaur bones (Morrison Formation, Upper Jurassic; Carnegie Quarry, Dinosaur National Monument, Utah, USA) 8 (48724235503).jpg |
Fossil log and dinosaur bones in the Jurassic of Utah, USA. This is a sandstone exposure of the Morrison Formation, an Upper Jurassic unit that is widely distributed in many western American states. The Morrison consists of fluvial (river/floodplain) and lacustrine (lake) deposits, plus reddish-colored paleosol horizons. Dinosaur bones and dinosaur tracks are moderately common in Morrison Formation sediments. Exceptionally rich localities include Como Bluff in Wyoming, Dinosaur National Monument in Utah (= this site), Dinosaur Ridge in Colorado, and the Cleveland-Lloyd Quarry in Utah. The dark-colored, elongated object in the middle of the picture is a fossil log. The surrounding fossils are dinosaur bones from various species. This richly fossiliferous bed is a fluvial sandstone, pebbly sandstone, and conglomerate (many of the pebbles are angular to subangular, however). Disarticulated and partly-articulated dinosaur bones are abundant, as are bivalves (clams). The unit is traditionally interpreted as a flash flood deposit in an ancient river environment. The sandstone and bones are also interpreted as having been deposited near a breached levee during a flooding event on a floodplain. Such deposits are called crevasse splays. 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> and <a href="https://en.wikipedia.org/wiki/Crevasse_splay" rel="noreferrer nofollow">en.wikipedia.org/wiki/Crevasse_splay</a> |
Date | Taken on 9 June 2012, 12:41 |
Source | Fossil log & dinosaur bones (Morrison Formation, Upper Jurassic; Carnegie Quarry, Dinosaur National Monument, Utah, USA) 8 |
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@N05/48724235503 (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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current | 00:38, 8 October 2019 | 3,910 × 1,811 (5.88 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/15 sec (0.066666666666667) |
F-number | f/4.9 |
ISO speed rating | 80 |
Date and time of data generation | 12:41, 9 June 2012 |
Lens focal length | 18.6 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 20:38, 12 September 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:41, 9 June 2012 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 3.90625 |
APEX aperture | 4.59375 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 16:38, 12 September 2019 |
Unique ID of original document | C187241B89E9D48482F60518BAD67118 |