File:Phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap, Great Smoky Mountains, North Carolina, USA) 11 (36450703434).jpg
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| Description |
Phyllite in the Precambrian of North Carolina, USA. (photo by Mary Ellen St. John) 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. The North Carolina-Tennessee border is along the crest of hill in this photo. The outcrop is on the North Carolina side of the line. Stratigraphy: Anakeesta Formation, Great Smoky Group, Ocoee Supergroup, Neoproterozoic Locality: outcrop at Newfound Gap (northwestern side of parking lot), southern side of Rt. 441 (Newfound Gap Road), Great Smoky Mountains National Park, next to the northern border of Swain County, far-western North Carolina (next to the Tennessee border), USA (35° 36’ 39.06" North latitude, 83° 25’ 34.02” West longitude) |
| Date | |
| Source | Phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap, Great Smoky Mountains, North Carolina, USA) 11 |
| 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@N05/36450703434 (archive). 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. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:18, 6 December 2019 | | 1,600 × 1,200 (1.82 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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