Wikimedia Commons

File:Quartz vein in phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap, Great Smoky Mountains, North Carolina, USA) 6 (36195653664).jpg

Original file ‎(1,997 × 2,246 pixels, file size: 4.2 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

edit
Description

Quartz vein in phyllite in the Precambrian of North Carolina, 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.

The prominent linear feature from near-upper left to the bottom is a vein - a fracture that has since filled with one or more minerals (in this case, quartz).

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 Quartz vein in phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap, Great Smoky Mountains, North Carolina, USA) 6
Author James St. John

Licensing

edit
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/36195653664 (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.

6 December 2019

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current02:16, 6 December 2019Thumbnail for version as of 02:16, 6 December 20191,997 × 2,246 (4.2 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

You cannot overwrite this file.

The following page uses this file:

Metadata

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.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Quartz_vein_in_phyllite_(Anakeesta_Formation,_Neoproterozoic;_Newfound_Gap,_Great_Smoky_Mountains,_North_Carolina,_USA)_6_(36195653664).jpg&oldid=650652046"