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Coral_atoll_formation_animation.gif ‎(320 × 237 pixels, file size: 38 KB, MIME type: image/gif, looped, 15 frames, 12 s)

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Description
English: This animation shows the dynamic process of how a coral atoll forms. Corals (represented in tan and purple) begin to settle and grow around an oceanic island forming a fringing reef. It can take as long as 10,000 years for a fringing reef to form. Over the next 100,000 years, if conditions are favorable, the reef will continue to expand. As the reef expands, the interior island usually begins to subside and the fringing reef turns into a barrier reef. When the island completely subsides beneath the water leaving a ring of growing coral with an open lagoon in its center, it is called an atoll. The process of atoll formation may take as long as 30,000,000 years to occur.
Date circa 2004
date QS:P,+2004-00-00T00:00:00Z/9,P1480,Q5727902
[1]
Source http://www.oceanservice.noaa.gov/education/kits/corals/media/supp_coral04a.html
Author NOAA [2]
Permission
( Reusing this file)
Public domain
This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

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image/gif

checksum

4d2bb0f0128e7c6380040b7284cf17c5bfa96df7

determination method: SHA-1

data size

38,733 byte

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11.799999999999999 second

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237 pixel

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320 pixel

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Date/TimeThumbnailDimensionsUserComment
current 21:32, 28 January 2006 Thumbnail for version as of 21:32, 28 January 2006320 × 237 (38 KB)Normann ZThis animation shows the dynamic process of how a coral atoll forms. Corals (represented in tan and purple) begin to settle and grow around an oceanic island forming a fringing reef. It can take as long as 10,000 years for a fringing reef to form. Ove

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