File:Map lichen.jpg
Original file (2,304 × 1,728 pixels, file size: 1.54 MB, 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. |
| Description |
Rhizocarpon geographicum, the map lichen. Growing on a rock face in Acadia National Park in Maine. If you zoom in on the larger pictures, you can see the beautiful and intricate green and black pattern. It turns out this species of lichen is common all over the globe on sheer rock faces and can be used to date events within 1000 years. The radius of an individual R. geographicum colony increases by about 0.5 to 0.8 mm/year (depending on the altitude)*. That would suggest that these colonies are at least over 100 years old (and hence are starting to fuse together).
|
||
| Date | |||
| Source | Flickr | ||
| Author | Vik Nanda | ||
| Permission (Reusing this file) |
  This file is licensed under the Creative Commons Attribution 2.0 Generic license.
|
||
| Reviewer | Astrojunta |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:52, 22 November 2007 | | 2,304 × 1,728 (1.54 MB) | Flickr upload bot | Uploaded from http://flickr.com/photo/26426438@N00/371160360 using User:Flickr upload bot |
File usage
Global file usage
The following other wikis use this file:
- Usage on is.wikipedia.org
- Usage on nl.wikipedia.org
- Usage on nn.wikipedia.org
