File:Mudcracks (3 August 2018) (ground near Giant Geyser, Yellowstone, Wyoming, USA) 2.jpg
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Summary edit
DescriptionMudcracks (3 August 2018) (ground near Giant Geyser, Yellowstone, Wyoming, USA) 2.jpg |
English: Mudcracks are diagnostic sedimentary structures indicating subaerial exposure of sediment surfaces, with alternating wet & dry conditions. They are much more common that raindrop imprints, which indicate the same environmental setting. Mudcracks are most likely to occur in fine-grained siliciclastic rocks, fine-grained carbonate sediments, and in some evaporitic successions.
Mudcracks are distinctive and easy to identify, but they do vary in appearance. The cracks themselves vary in width, depth, and areal density. Mudcrack polygons also vary in size & shape. The examples shown here are developed in modern soil. The brown-colored soil is coated with a thin crust of whitish-colored siliceous sinter. The water that sometimes inundates this surface is geyser runoff, which has small amounts of dissolved silica. Upon evaporation, opal forms. Deposits of opal precipitated from hydrothermal water are called siliceous sinter (also known as opalite). In the splash zone around a geyser itself, the opalite deposit is called geyserite. Locality: ground adjacent to boardwalk, south-southwest of Giant Geyser, Upper Geyser Basin, Yellowstone, northwestern Wyoming, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/46516845451/ |
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@N05/46516845451 (archive). It was reviewed on 2 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
2 March 2020
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current | 22:42, 2 March 2020 | 4,000 × 3,000 (7.13 MB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/1,250 sec (0.0008) |
F-number | f/4.9 |
ISO speed rating | 80 |
Date and time of data generation | 16:43, 3 August 2018 |
Lens focal length | 18.6 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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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 | 14:14, 29 December 2018 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:43, 3 August 2018 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 10.28125 |
APEX aperture | 4.59375 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
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 | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 09:14, 29 December 2018 |
Unique ID of original document | A167338FE943E31D558F4B406565600D |
IIM version | 32,767 |