File:Metadunite (recrystallized) with band of chromitite (chromium ore) (Day Book Dunite; Green Mountain Mine, northern Yancey County, Blue Ridge, southern Appalachians, western North Carolina, USA) (15060760435).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(1,963 × 1,303 pixels, file size: 1.31 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description

Metadunite (green) with band of chromitite (black) from the Day Book Dunite. (Geology Department, Ohio State University, Columbus, Ohio, USA)

In orogenic belts, olivine-bearing rocks often have the olivine component altered and metamorphosed, usually into serpentine. The Day Book Dunite is an exception to this. It is located in the Blue Ridge Province of the southern Appalachian Mountains in North Carolina, USA.

Dunites are >90% olivine varieties of peridotites, which are ultramafic intrusive igneous rocks. The Day Book Dunite of western North Carolina appears to represent a metamorphosed sliver of mantle rocks, but it has not been serpentinized. In the rock shown here, the greenish material is forsterite olivine (magnesium-rich (Mg,Fe)2SiO4). The black material is chromite (iron chromium oxide - FeCr2O4).

This rock has been metamorphosed somewhat (and thus should really be called metadunite, not dunite). Metamorphism of the Day Book Dunite took place during the Ordovician (?).
Date
Source Metadunite (recrystallized) with band of chromitite (chromium ore) (Day Book Dunite; Green Mountain Mine, northern Yancey County, Blue Ridge, southern Appalachians, western North Carolina, USA)
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@N05/15060760435 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

File history

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

Date/TimeThumbnailDimensionsUserComment
current17:54, 7 December 2019Thumbnail for version as of 17:54, 7 December 20191,963 × 1,303 (1.31 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:Metadunite_(recrystallized)_with_band_of_chromitite_(chromium_ore)_(Day_Book_Dunite;_Green_Mountain_Mine,_northern_Yancey_County,_Blue_Ridge,_southern_Appalachians,_western_North_Carolina,_USA)_(15060760435).jpg&oldid=556681998"