File:Highway rock salt (37382600501).jpg
![File:Highway rock salt (37382600501).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Highway_rock_salt_%2837382600501%29.jpg/685px-Highway_rock_salt_%2837382600501%29.jpg?20191206023728)
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Summary
[edit]DescriptionHighway rock salt (37382600501).jpg |
(public display at the Columbus Rock & Mineral Show) Rock salt, also known as "halitite", is a crystalline-textured, chemical sedimentary rock composed of the mineral halite (NaCl - sodium chloride). Rock salt is an evaporite - it forms by the evaporation of water (usually seawater) and the precipitation of dissolved minerals. Other evaporites include rock gypsum (gyprock), rock anhydrite, and rock sylvite (sylvitite). Rock salt has economic significance - it is mined as a source of salt for the food industry and as a de-icing agent. Shown above is rock salt intended to be used on winter roadways to prevent ice buildup. Calcium chloride and other chemicals are also used as roadway de-icing agents. |
Date | |
Source | Highway rock salt |
Author | James St. John |
Licensing
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/37382600501 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 December 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:37, 6 December 2019 | ![]() | 3,113 × 2,724 (5.01 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 12:39, 9 April 2017 |
Lens focal length | 9.681 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 | 22:21, 28 September 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:39, 9 April 2017 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | 0 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
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 | Auto 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 | 18:21, 28 September 2017 |
Unique ID of original document | D16DC264C7AC968FFF94F5F90C520542 |
IIM version | 32,767 |