File:Thunderhead Sandstone (Neoproterozoic; Chimney Tops overlook roadcut, Great Smoky Mountains, Tennessee, USA) 5 (36885030092).jpg
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DescriptionThunderhead Sandstone (Neoproterozoic; Chimney Tops overlook roadcut, Great Smoky Mountains, Tennessee, USA) 5 (36885030092).jpg |
Sandstone in the Precambrian of Tennessee, USA. This is an outcrop of Thunderhead Sandstone 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. The Thunderhead Sandstone in the park consists of coarse-grained sandstone with granules. It has quartz and potassium feldspar - it's an arkosic sandstone. Subangular grains appear to dominate. Some phyllite interbeds are present - these were originally shales, but have been metamorphosed. Stratigraphy: Thunderhead Sandstone, Great Smoky Group, Ocoee Supergroup, Neoproterozoic Locality: roadcut along Newfound Gap Road (Rt. 441) at mile marker 5.4 of Moore (1988) (A Roadside Guide to the Geology of the Great Smoky Mountains National Park, page 90) (= park service milepost 7), near Chimney Tops overlook, Great Smoky Mountains National Park, southern Sevier County, eastern Tennessee, USA |
Date | |
Source | Thunderhead Sandstone (Neoproterozoic; Chimney Tops overlook roadcut, Great Smoky Mountains, Tennessee, USA) 5 |
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@N05/36885030092. 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
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:17, 6 December 2019 | 1,989 × 2,798 (5.65 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Date and time of data generation | 09:33, 23 June 2008 |
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Bits per component |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 21:54, 5 September 2017 |
Exposure Program | Not defined |
Exif version | 2.2 |
Date and time of digitizing | 09:33, 23 June 2008 |
Meaning of each component |
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Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
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White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 33 mm |
Scene capture type | Landscape |
Contrast | Normal |
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Serial number of camera | NO= 1004a0cc |
Date metadata was last modified | 17:54, 5 September 2017 |
Unique ID of original document | C3AABCF6CC463A7E833C6F7357D814FE |
IIM version | 2 |