File:Amphibolite from under Cape Cod USA.jpg
Size of this preview: 596 × 600 pixels. Other resolutions: 238 × 240 pixels | 600 × 604 pixels.
Original file (600 × 604 pixels, file size: 145 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Foliated amphibolite, sample 81MW0005, a borehole sample from under Cape Cod in Massachusetts in USA. It is made of the minerals plagioclase (35%), hornblende (20%), biotite (20%), epidote (15%), quartz (9%), and trace oxides and sphene. Plagioclase is mostly fine grained and subhedral and occurs in the matrix. Fine-grained hornblende occurs as anhedral pleochroic green-tan crystals. Biotite is partly, but not entirely aligned in the foliation, suggesting that deformation took place before a secondary growth of biotite. Epidote is anhedral, and sometimes rimmed by biotite. Quartz occurs in 2 mm-thick aggregates and shows subgrain development. |
| Date | |
| Source | U.S. Geological Survey Open-File Report 03-221 (2004) A Pictorial Survey of the Bedrock Beneath Western Cape Cod, Massachusetts, sample 81mw0005 http://pubs.usgs.gov/of/2003/of03-221/htmldocs/bedrock_photos/81mw0005.htm |
| Author | B.W. Hallett, V. F. Paskevich, L.J. Poppe, S.G. Brand, and D.S. Blackwood |
| Object location |  | View this and other nearby images on: OpenStreetMap |  |
|---|
Licensing
|
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
|
 |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:56, 4 December 2013 | | 600 × 604 (145 KB) | GeoWriter | User created page with UploadWizard |
File usage
The following page uses this file:
Global file usage
The following other wikis use this file:
- Usage on en.wikiversity.org
- Usage on eo.wiki.x.io
- Usage on gl.wiki.x.io
- Usage on id.wiki.x.io
- Usage on it.wiki.x.io
- Usage on ja.wiki.x.io
