File:Garnet-biotite rock, Beartooth Mountains MT.jpg
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Summary
[edit]DescriptionGarnet-biotite rock, Beartooth Mountains MT.jpg |
Garnet-biotite rock (3.8 cm across at its widest) from the Precambrian of Montana, USA. This gorgeous rock is dominated by deep red, rounded garnet crystals and lustrous black biotite mica. It is from an alteration halo around Archean-aged, magnetite-rich meta-iron formation. It, and the enclosed meta-iron formation, formed during two metamorphic episodes in the Precambrian: one in the Paleoarchean, at about 3.4 Ga (granulite-facies metamorphism) and another at about 2.8 Ga (upper amphibolite facies metamorphism). Locality: Quad Creek section (= locality of Mueller et al., 1987, Geological Society of America Centennial Field Guide, Rocky Mountain Section, pp. 75-76) - roadcut on southern side of Beartooth Highway (Rt. 212), immediately west of Quad Creek, between milepost 50 and milepost 51, southern side of Rock Creek Canyon, just north of the eroded edge of Beartooth Plateau, southwest of the town of Red Lodge, Beartooth Mountains, southern Montana, USA (45° 01' 41.27" North & 109° 24' 55.31" West). |
Date | |
Source | Garnet-biotite rock (alteration halo around magnetite-rich meta-iron formation) (Archean, metamorphism at about 3.4 Ga & about 2.8 Ga; Quad Creek section - roadcut along the Beartooth Highway, Beartooth Mountains, southern Montana, USA) |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15216910771. It was reviewed on 15 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
15 September 2014
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current | 23:53, 13 September 2014 | 2,188 × 2,192 (2.71 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2commons |
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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.
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 | 23:39, 2 July 2012 |
Lens focal length | 11.614 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 19:12, 12 September 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 23:39, 2 July 2012 |
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 |
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 | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 2,188 px |
Image height | 2,192 px |
Date metadata was last modified | 15:12, 12 September 2014 |
IIM version | 2 |
Structured data
Items portrayed in this file
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2 July 2012
0.01666666666666666666 second
11
11.614 millimetre
image/jpeg
- Geology of the Beartooth Mountains (Montana)
- Garnets in the United States
- Biotite
- Metamorphic rocks in Montana
- Igneous rocks in Montana
- Meta-iron-formations
- Archean metamorphism
- Paleoarchean geology of Montana
- Rock samples from Montana
- Mesoarchean geology of Montana
- Archean metamorphic rocks in the United States