File:Halite salt casts in friable mudshale (Twist Gulch Formation, Middle Jurassic; float near old, small copper mine on northern side of Salina Canyon, central Utah, USA) (15047117122).jpg
Original file (3,008 × 2,000 pixels, file size: 1.92 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionHalite salt casts in friable mudshale (Twist Gulch Formation, Middle Jurassic; float near old, small copper mine on northern side of Salina Canyon, central Utah, USA) (15047117122).jpg |
Halite salt casts in friable mudshale from the Jurassic of Utah, USA. (field of view ~3.5 cm across) One of the most distinctive and environmentally diagnostic (& rare, in my experience) features in the sedimentary record is a halite salt cast. Halite (NaCl - sodium chloride) is a relatively common mineral - it is abundantly preserved in ancient evaporite successions and modern evaporite settings. If seawater-soaked siliciclastic sediments dry out, halite crystals may form. Halite crystals will almost always have nice cubic forms, but they can have embayed faces. This mineral is readily soluble in water, so halite may precipitate and redissolve relatively quickly. The crystal forms may become preserved in the sediments, as casts. Preserved halite salt casts unquestionably demonstrate that the sedimentary environment was an evaporite setting. Stratigraphy: float from the Twist Gulch Formation, Middle Jurassic Locality: loose piece from near small abandoned copper mine at Twist Gulch Formation-Flagstaff Limestone angular unconformity outcrop in Salina Canyon, central Utah, USA |
Date | |
Source | Halite salt casts in friable mudshale (Twist Gulch Formation, Middle Jurassic; float near old, small copper mine on northern side of Salina Canyon, central Utah, USA) |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15047117122 (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
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 03:56, 6 December 2019 | 3,008 × 2,000 (1.92 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
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.
Orientation | Normal |
---|---|
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 20:30, 29 September 2007 |
Color space | Uncalibrated |
Image width | 3,008 px |
Image height | 2,000 px |
Date and time of digitizing | 15:25, 29 September 2007 |
Date metadata was last modified | 16:30, 29 September 2007 |