File:Concretions in the Navajo Sandstone (Lower Jurassic; north of Bootlegger Canyon, Utah, USA) 1.jpg
![File:Concretions in the Navajo Sandstone (Lower Jurassic; north of Bootlegger Canyon, Utah, USA) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Concretions_in_the_Navajo_Sandstone_%28Lower_Jurassic%3B_north_of_Bootlegger_Canyon%2C_Utah%2C_USA%29_1.jpg/800px-Concretions_in_the_Navajo_Sandstone_%28Lower_Jurassic%3B_north_of_Bootlegger_Canyon%2C_Utah%2C_USA%29_1.jpg?20221113042145)
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[edit]DescriptionConcretions in the Navajo Sandstone (Lower Jurassic; north of Bootlegger Canyon, Utah, USA) 1.jpg |
English: Concretions in sandstone in the Jurassic of Utah, USA
This outcrop consists of eolian sandstones of the Navajo Sandstone, a thick, Mesozoic-aged unit representing ancient sand dune deposits. The Navajo is a prominent cliff-forming unit in much of western America. The coloration is from hematite (Fe2O3 - iron oxide). Laterally-equivalent units are known by other names, but are all the same deposit: Glen Canyon Sandstone, Nugget Sandstone, and Aztec Sandstone. The rounded structures are concretions - post-depositional structures found in some sedimentary successions, often in shales. They vary in mineralogy, size, and shape, but often have slightly flattened spheroidal shapes. They form by post-depositional mineralization around some nucleus (e.g., a rock fragment or fossil fragment). Stratigraphy: Navajo Sandstone, Glen Canyon Group, Lower Jurassic Locality: outcrop along Corona Arch Trail, north of Bootlegger Canyon & east of the Colorado River, west of the town of Moab, eastern Utah, USA |
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Source | https://www.flickr.com/photos/47445767@N05/52491683957/ |
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@N05/52491683957. It was reviewed on 13 November 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 November 2022
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current | 04:21, 13 November 2022 | ![]() | 4,000 × 3,000 (7.86 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52491683957/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 17:53, 11 May 2014 |
Lens focal length | 9.681 mm |
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 20.0 (Macintosh) |
File change date and time | 00:19, 11 November 2022 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:53, 11 May 2014 |
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Image compression mode | 3 |
APEX shutter speed | 8.3125 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, auto 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 | 19:19, 10 November 2022 |
Unique ID of original document | EBA0D9BDE529974A066687EA6BA3FCFC |