File:Pink halite (Holocene; Searles Lake, near Trona, California, USA) 2.jpg
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Captions
Summary
[edit]DescriptionPink halite (Holocene; Searles Lake, near Trona, California, USA) 2.jpg |
English: Halite from the uppermost Holocene of California, USA. (~2.25 centimeters across at its widest)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5500 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The halides are the "salt minerals", and have one or more of the following anions: Cl-, F-, I-, Br-. Halite is true salt, which consists of sodium chloride (NaCl). This is the same chemical long used as flavoring on food & as a preservative. It has a nonmetallic luster, typically clearish/coloress, and is relatively soft (H = 2.5). Halite forms cubic crystals and has cubic cleavage (= 3 cleavage planes meeting at 90º angles). Halite is most readily identified by its strongly salty taste. Halite has economic value. In addition to its use in food, salt is traditionally used in large quantities in wintertime to prevent roadways from icing up. Halite is principally mined from ancient rock salt successions. Rock salt is a chemical sedimentary rock composed of halite and formed by evaporation of seawater. Seen here is a small cluster of pink halite from Searles Lake in California. Through geologic time, the lake has alternated between having water and being dry. What little water does occur in modern Searles Lake is highly saline. When the water evaporates, halite precipitates. The pinkish coloration is from incorporation of pigments (carotenoids) in halophilic archaea and algae that live in the water. Locality: Searles Lake, next to the town of Trona, far-northwestern San Bernardino County, southern California, USA Photo gallery of halite: www.mindat.org/gallery.php?min=1804 See info. at: en.wikipedia.org/wiki/Searles_Lake |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/49422255753/ |
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@N05/49422255753. It was reviewed on 13 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 October 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:10, 13 October 2020 | 1,587 × 1,266 (1.05 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49422255753/ with UploadWizard |
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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/11 |
ISO speed rating | 80 |
Date and time of data generation | 21:15, 21 January 2020 |
Lens focal length | 11.614 mm |
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 16.0 (Macintosh) |
File change date and time | 23:48, 21 January 2020 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 21:15, 21 January 2020 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4 APEX (f/4) |
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 | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 18:48, 21 January 2020 |
Unique ID of original document | 872EB49B9CF0B664AE8B0522C1E5F725 |