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Atoll_forming-Barrier_reef.png ‎(263 × 102 pixels, file size: 33 KB, MIME type: image/png)

Description Internationalization of the diagram:Atoll forming.
1=Volcanic Island
2=Fringing reef
3=Barrier reeef
Caption: Coral atolls develop from reefs fringing volcanic islands. As first hypothesized by Charles Darwin, and confirmed by ocean drilling done by British scientists a century ago, reefs fringing volcanic islands build vertically to sea level, forming steepwalled barrier reefs. As a volcanic island subsides, or sinks, with time, the growing reef keeps pace with the rising water level. When the island eventually submerges, the ring-shaped reef forms an atoll with a central lagoon.
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped barrier reef. The original can be viewed here: Atoll forming-i18.png:  . Modifications made by Geronimo20.


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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.

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This image is a derivative work of the following images:

  • File:Atoll_forming-i18.png licensed with PD-USGov-USGS
    • 2006-05-29T18:32:53Z Zimbres 1667x2423 (498020 Bytes) {{Information |Description= Internationalization of the diagram:Atoll forming. '''1'''=Volcanic Island '''2'''=Fringind reef '''3'''=Barrier reeef |Source=http://commons.wikimedia.org/wiki/Image:Atoll_forming.jpg |Date= |Aut

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current 06:43, 9 January 2010 Thumbnail for version as of 06:43, 9 January 2010263 × 102 (33 KB)Geronimo20{{Information |Description=Internationalization of the diagram:Atoll forming.<br> '''1'''=Volcanic Island<br> '''2'''=Fringing reef<br> '''3'''=Barrier reeef<br> Caption: Coral atolls develop from reefs fringing volcanic islands. As first hypothesized by
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