File:Phyllites (Anakeesta Formation).jpg
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Summary
editDescriptionPhyllites (Anakeesta Formation).jpg |
English: Phyllites (Anakeesta Formation, Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 5
Phyllite in the Precambrian of Tennessee, USA.
This is an outcrop of Anakeesta Formation in the Great Smoky Mountains. It's one of many stratigraphic units in the ~50,000 feet thick Ocoee Supergroup. The Ocoee has considerable deposits of sandstone and shale originally deposited as sands and muds in an ancient ocean trench. Trenches form along subduction zones, where a tectonic plate composed of thin, heavy oceanic lithosphere dives down into the mantle below another tectonic plate of either oceanic lithosphere or thick, lightweight continental lithosphere.
Rocks in the Anakeesta Formation were originally shales, but have been metamorphosed to phyllites. Phyllite is a foliated, low to intermediate grade metamorphic rock dominated by mica. It often has wrinkled and crinkled foliation surfaces. The brownish coloration in this outcrop is iron oxide staining produced by oxidative weathering of pyrite in the phyllite.
Stratigraphy: Anakeesta Formation, Great Smoky Group, Ocoee Supergroup, Neoproterozoic
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Date | |
Source | https://www.flickr.com/photos/jsjgeology/36229558353 |
Author | James St. John |
Licensing
editThis image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/36229558353 (archive). It was reviewed on 1 March 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 March 2019
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current | 00:52, 1 March 2019 | 3,008 × 2,000 (5.92 MB) | RockingGeo (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/640 sec (0.0015625) |
F-number | f/10 |
ISO speed rating | 1,600 |
Date and time of data generation | 09:56, 23 June 2008 |
Lens focal length | 200 mm |
Width | 3,008 px |
Height | 2,000 px |
Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 00:53, 5 September 2017 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 09:56, 23 June 2008 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 9.321928 |
APEX aperture | 6.643856 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 10 |
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DateTimeDigitized subseconds | 10 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 300 mm |
Scene capture type | Landscape |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Hard |
Subject distance range | Unknown |
Serial number of camera | 1004a0cc |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Date metadata was last modified | 20:53, 4 September 2017 |
Unique ID of original document | 950997CAF80E201F28049D312FBDC2D6 |
IIM version | 29,735 |