File:Vetulonaia sp. (fossil clams) (Morrison Formation, Upper Jurassic; Dinosaur National Monument, Utah, USA) 49 (48838178077).jpg
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[edit]DescriptionVetulonaia sp. (fossil clams) (Morrison Formation, Upper Jurassic; Dinosaur National Monument, Utah, USA) 49 (48838178077).jpg |
Vetulonaia sp. - fossil freshwater bivalves in the Jurassic of Utah, USA. The ellipsoidal structures in the rock are fossil freshwater clams at Dinosaur National Monument, Utah. The host rock in this area ranges from a 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. This horizon is famous for an abundance of Late Jurassic dinosaur bones from sauropods, stegosaurs, and theropods. Across the valley from here, the bed was intensely quarried starting in the early 1900s. Many dinosaur fossils ended up at Carnegie Museum in Pittsburgh, Pennsylvania, but many bones were also left in the rocks for the general public to examine and appreciate. The Carnegie Quarry itself has a structure built over it for protection from erosion. The clam and dinosaur bone-bearing outcrop seen here is outdoors. The clams do not have their shells preserved - they are internal molds. Molds are a common type of fossil preservation style, consisting of impressions of the exterior or interior surfaces of hard part shells or skeletons. Classification: Animalia, Mollusca, Bivalvia, Paleoheterodonta, Unionida, Unionidae Stratigraphy: Carnegie Quarry Sandstone, Brushy Basin Member, Morrison Formation, Kimmeridgian Stage, Upper Jurassic, ~150 to 156 Ma Locality: spur trail along Fossil Discovery Trail, 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> |
Date | Taken on 9 June 2012, 11:36 |
Source | Vetulonaia sp. (fossil clams) (Morrison Formation, Upper Jurassic; Dinosaur National Monument, Utah, USA) 49 |
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@N05/48838178077 (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 | 00:52, 8 October 2019 | 4,000 × 3,000 (10.92 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 | 1/160 sec (0.00625) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 11:36, 9 June 2012 |
Lens focal length | 6.2 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 | 13:09, 3 October 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:36, 9 June 2012 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 7.3125 |
APEX aperture | 6 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
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 | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 09:09, 3 October 2019 |
Unique ID of original document | E454AFBB2E44A5F69B43D435DC3AA076 |