Portion of a Pacific atoll (Yap) showing two islets on the ribbon or barrier reef separated by a deep pass between the ocean and the lagoon.
Mr. Ben Mieremet, Senior Advisor OSD, NOAA
Taken from <a rel="nofollow" class="external free" href="http://www.photolib.noaa.gov/htmls/mvey0290.htm">http://www.photolib.noaa.gov/htmls/mvey0290.htm</a>