File:Fossil leaf (Laramie Formation; Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, USA) 5.jpg
Original file (2,394 × 1,603 pixels, file size: 3.8 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionFossil leaf (Laramie Formation; Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, USA) 5.jpg |
English: Fossil leaf in sandstone in the Cretaceous of Colorado, USA.
Seen here is a fossil leaf exposed on the underside of a tectonically-tilted sandstone bed in Golden, Colorado. This is an old clay mine - soft clay horizons occurred between hard sandstone intervals of the Laramie Formation. The beds here are vertically oriented - structural tilting occurred during the Laramide Orogeny in the Tertiary. The Laramie Formation is a nonmarine, coastal plain to deltaic succession of mostly mixed siliciclastic sedimentary rocks - sandstones, siltstones, claystones, and coals. After clay mining ceased, the site became a landfill for ash from coal burning operations. Landfill activity buried many dinosaur footprints preserved in the Laramie Formation sandstones. The locality is now a "fossil preserve" with dinosaur footprints, plant fossils, and other features that can be closely examined along trails. An odd-looking golf course makes up the rest of the old clay mine. 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' 36.39" North latitude, 105° 13’ 10.37" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/52593317864/ |
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@N05/52593317864. It was reviewed on 29 December 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
29 December 2022
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:13, 29 December 2022 | 2,394 × 1,603 (3.8 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52593317864/ with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/125 sec (0.008) |
F-number | f/8 |
ISO speed rating | 500 |
Date and time of data generation | 16:14, 25 July 2007 |
Lens focal length | 80 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 | 03:03, 29 December 2022 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 16:14, 25 July 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 6.965784 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 4.7 APEX (f/5.1) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
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 | 120 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 | 22:03, 28 December 2022 |
Unique ID of original document | 0D8BF1D7903159E2A60C7086D0FD22FB |