File:Hadrosaur dinosaur footprint (Laramie Formation, Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, USA) 1.jpg
Original file (2,439 × 2,000 pixels, file size: 3.91 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionHadrosaur dinosaur footprint (Laramie Formation, Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, USA) 1.jpg |
English: Dinosaur footprint in the Cretaceous of 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. Seen here is a dinosaur footprint on the basal surface of a structurally-tilted sandstone horizon. This is part of Colorado's Laramie Formation, a nonmarine, coastal plain to deltaic succession of mostly mixed siliciclastic sedimentary rocks - sandstones, siltstones, claystones, and coals. This tridactyl track is interpreted as a hadrosaur footprint. The individual was walking to the east. Classification of trace maker: Animalia, Chordata, Vertebrata, Reptilia, Archosauria, Dinosauria, Ornithischia, Ornithopoda, Hadrosauridae Stratigraphy: Laramie Formation, Maastrichtian Stage, upper Upper Cretaceous Locality: outcrop along Triceratops Trail, Parfet Prehistoric Preserve, southern side of the town of Golden, Colorado, USA (~vicinity of 39° 44' 34.42" North latitude, 105° 13’ 11.71" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/52519361412/ |
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@N05/52519361412. It was reviewed on 29 November 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
29 November 2022
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:35, 29 November 2022 | 2,439 × 2,000 (3.91 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52519361412/ with UploadWizard |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/200 sec (0.005) |
F-number | f/8 |
ISO speed rating | 500 |
Date and time of data generation | 15:46, 25 July 2007 |
Lens focal length | 35 mm |
Width | 3,008 px |
Height | 2,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 20:39, 23 November 2022 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 15:46, 25 July 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 7.643856 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 4.1 APEX (f/4.14) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 80 |
DateTimeOriginal subseconds | 80 |
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 |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 52 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 1004a0cc |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Date metadata was last modified | 15:39, 23 November 2022 |
Unique ID of original document | 53CE50B012539317CBCF49DE21B747F3 |