File:Greenlandite (fuchsite-quartz gneiss), Greenland.jpg
Original file (773 × 809 pixels, file size: 727 KB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit],_Greenland.jpg&action=edit§ion=1){kind=link}
| Description |
Greenlandite (fuchsite-quartz gneiss) (2.7 cm across at its widest) from the Precambrian of southwestern Greenland. Green = fuchsite; gray = quartz; a few small, scattered pyrite crystals (brassy gold-colored) are also visible. Attractive greenish-colored gneisses in southwestern Greenland that contain the minerals fuchsite (green) and quartz (gray) have been informally called greenlandite. Fuchsite is a chromian muscovite mica (K(Al,Cr)2AlSi3O10(OH,F)2 - potassium chromium hydroxy-fluoro-aluminosilicate); it is typically encountered in schistose rocks. Greenland greenlandite is part of a 3.8 billion year old, highly metamorphosed succession of rocks. These represent the oldest known supracrustal rocks on Earth (the oldest crustal Earth rocks include 4.03 billion year old Acasta Gneiss, 4.28 b.y. rocks from the eastern Hudson Bay area, and 4.45-4.55 b.y. rocks in the subsurface of Baffin Island, Canada). Locality: undisclosed locality in the Godthåbsfjord area or Nuuk area, southwestern Greenland. Age: Eoarchean boundary, 3.8 billion years. |
| Date | |
| Source | Greenlandite (fuchsite-quartz gneiss) (Eoarchean, 3.8 Ga; Godthabsfjord area or Nuuk area of southwestern Greenland) |
| Author | James St. John |
Licensing
[edit],_Greenland.jpg&action=edit§ion=2){kind=link}
- 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 jsj1771 at https://www.flickr.com/photos/47445767@N05/14882301487. It was reviewed on 30 August 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:03, 30 August 2014 | | 773 × 809 (727 KB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2commons |
You cannot overwrite this file.
File usage on Commons
File usage on other wikis
The following other wikis use this file:
- Usage on ar.wikipedia.org
- Usage on de.wikipedia.org
- Usage on en.wikipedia.org
- Usage on en.wikiversity.org
- Usage on eu.wikipedia.org
- Usage on gl.wikipedia.org
- Usage on ms.wikipedia.org
- Usage on tr.wikipedia.org
- Usage on zh.wikipedia.org
,_Greenland.jpg&oldid=936079678){kind=link}