File:Infant Apatosaurus dinosaur tracks.jpg
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Summary
[edit]DescriptionInfant Apatosaurus dinosaur tracks.jpg |
Infant Apatosaurus dinosaur tracks from the Jurassic of Colorado, USA (public display, Morrison Natural History Museum, Morrison, Colorado, USA). This rock is a channel sandstone, deposited in an ancient river or stream. The sandstone block has dinosaur bones in it, plus some remarkable dinosaur tracks on its top surface. The large depression at the top left part of the block (below the head of the model) is an adult sauropod dinosaur footprint, attributed to Apatosaurus. The row of shadowed depressions below the adult track is a set of infant Apatosaurus footprints. Claw impressions are present. No tail drag marks are present (dinosaur tail traces are very rare everywhere on Earth - dinosaurs didn't want to drag their tails, because friction would slow them down, plus it would cause pain). Stratigraphy: Morrison Formation, Upper Jurassic Locality: Quarry 5, Dinosaur Ridge, west of Denver, north-central Colorado, USA Trace fossils are any indirect evidence of ancient life. They refer to features in rocks that do not represent parts of the body of a once-living organism. Traces include footprints, tracks, trails, burrows, borings, and bitemarks. Body fossils provide information about the morphology of ancient organisms, while trace fossils provide information about the behavior of ancient life forms. Interpreting trace fossils and determination of the identity of a trace maker can be straightforward (for example, a dinosaur footprint represents walking behavior) or not. Sediments that have trace fossils are said to be bioturbated. Burrowed textures in sedimentary rocks are referred to as bioturbation. Trace fossils have scientific names assigned to them, in the same style & manner as living organisms or body fossils. |
Date | |
Source | Infant Apatosaurus dinosaur tracks (Morrison Formation, Upper Jurassic; Quarry 5, Dinosaur Ridge, west of Denver, north-central Colorado, USA) 2 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15352575788. It was reviewed on 7 November 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 November 2014
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current | 18:17, 7 November 2014 | ![]() | 2,659 × 1,998 (1.98 MB) | FunkMonk (talk | contribs) | Transferred from Flickr via Flickr2commons |
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Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/3.5 |
Date and time of data generation | 10:47, 3 November 2010 |
Lens focal length | 18 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 20:18, 14 October 2014 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 10:47, 3 November 2010 |
Meaning of each component |
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APEX exposure bias | 0 |
Maximum land aperture | 3.6 APEX (f/3.48) |
Metering mode | Pattern |
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DateTime subseconds | 80 |
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DateTimeDigitized subseconds | 80 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
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Scene capture type | Standard |
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Image width | 2,659 px |
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Date metadata was last modified | 16:18, 14 October 2014 |