File:Sauropod gastroliths.jpg
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Summary
[edit]DescriptionSauropod gastroliths.jpg |
English: Dinosaur gastroliths from the Jurassic of Montana, USA.
Gastroliths are the dinosaur equivalent of gizzard stones in birds. Some birds (e.g., chickens) & some modern reptiles (e.g., crocodilians) swallow pebbles and retain them in their gizzards. The stones help to grind down food as it passes through the upper digestive tract. The rocks themselves get polished in the process. Some dinosaur skeletons have been found with concentrations of highly polished, somewhat size-sorted rocks associated with the rib cage area. These have been reasonably identified as dinosaur gizzard stones (gastroliths; a.k.a. gastric stones). Gastroliths have only been reported from the remains of sauropods, some early ceratopsians, and some ankylosaurs. The rocks shown here were swallowed by Diploducus, a large sauropod dinosaur. Stratigraphy: Morrison Formation, Upper Jurassic Locality: Mother's Day site, Carbon County, Montana, USA |
Date | |
Source | https://www.flickr.com/photos/jsjgeology/41561266670/ |
Author | James St. John |
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current | 12:51, 13 July 2018 | ![]() | 2,206 × 1,183 (1.89 MB) | FunkMonk (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/13 |
ISO speed rating | 80 |
Date and time of data generation | 11:35, 5 May 2018 |
Lens focal length | 14.303 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
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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 | 00:48, 12 July 2018 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:35, 5 May 2018 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 7.40625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4.34375 APEX (f/4.51) |
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Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
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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 | 20:48, 11 July 2018 |
Unique ID of original document | 8564D83386988648896764FD12C4B4FA |
IIM version | 29,736 |