File:Opalite-chert with cinnabar (Silver Chief Mine, Battle Mountain, Nevada, USA) 12.jpg
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[edit]DescriptionOpalite-chert with cinnabar (Silver Chief Mine, Battle Mountain, Nevada, USA) 12.jpg |
English: Opalite-chert with cinnabar from Nevada, USA.
Opalite is an opal-dominated rock (opal = amorphous hydrous silica = SiO2·nH2O). “Opal” is a mineral/mineraloid name. “Opalite” is a rock name. Opalites form principally by alteration of volcanic rocks or alteration of siliceous sinter (a type of hot spring deposit). They are often described as “impure” opal rocks. They lack the famous “fire” and rainbow colors of gem-grade opal. The opalite seen here is from Nevada's mercury belt and contains reddish-colored cinnabar and blackish-colored metacinnabar (both are HgS - mercury sulfide). Mercury minerals hosted in opalite are common in Nevada. The opalite is often silicified volcanic tuffs or hot spring deposits - this results in a chert-opal rock having cryptocrystalline quartz and amorphous hydrous silica (Gray et al., 1999). Locality: Silver Chief Mine, Battle Mountain Mining District, Lander County, northern Nevada, USA Reference cited: Gray et al. (1999) - Geochemical data for environmental studies of mercury mines in Nevada. United States Geological Survey Open-File Report 99-576. 21 pp. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/50906378666/ |
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@N05/50906378666. It was reviewed on 8 February 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
8 February 2021
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:44, 8 February 2021 | ![]() | 3,840 × 2,556 (5.77 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50906378666/ 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 | 17:02, 3 February 2021 |
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 18.0 (Macintosh) |
File change date and time | 18:13, 3 February 2021 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:02, 3 February 2021 |
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 | 13:13, 3 February 2021 |
Unique ID of original document | AA57A69F13C3A2F25C00D8591F9A50C6 |