File:Dinosaur bone in sandstone (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) (22022125159).jpg
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DescriptionDinosaur bone in sandstone (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) (22022125159).jpg |
Dinosaur bone in sandstone in the Jurassic of Colorado, USA. Dinosaur Ridge is a particularly dinosaur fossil-rich section of the Dakota Hogback in north-central Colorado. It is a north-south trending ridge of eastward-dipping Mesozoic sedimentary rocks. The western side of Dinosaur Ridge (see above photo) has exposures of the Morrison Formation, an Upper Jurassic succession consisting of fluvial (river/floodplain) and lacustrine (lake) deposits, plus reddish-colored paleosol horizons. Dinosaur bones and dinosaur tracks have been found here. The fossil shown above is a cross-section through a dinosaur bone in a fluvial sandstone matrix. Several dinosaur bones occur at this site - part of a river channel sandstone deposit. Paleocurrent indicators show that the river system was flowing to the southeast. Stratigraphy: Morrison Formation, Kimmeridgian Stage, middle Upper Jurassic, ~150 to 156 Ma Locality: "Quarry 5" (= one of Arthur Lakes' dinosaur excavation sites during the Cope-Marsh Bone Wars of the late 1800s), western side of Dinosaur Ridge, between Interstate 70 and the town of Morrison, west of Denver, north-central Colorado, USA |
Date | |
Source | Dinosaur bone in sandstone (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, 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@N05/22022125159 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 December 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:58, 6 December 2019 | 3,659 × 1,948 (3.79 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 | 1/200 sec (0.005) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 14:07, 16 July 2015 |
Lens focal length | 6.2 mm |
Image title | |
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 13.0 (Macintosh) |
File change date and time | 23:44, 15 October 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 14:07, 16 July 2015 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 7.65625 |
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 | 17:44, 15 October 2015 |
Unique ID of original document | D6073E46E133E986548DF32E349A8DF4 |