Atoll — Free Oceanography Illustration

Oceanography

Atoll

Top-down view of an atoll as a ring-shaped coral reef or low coral island encircling a central lagoon, with no large central volcanic island exposed. The ring is nearly circular to oval and irregular, shown as a low narrow rim near sea level in pale tan, beige, brown, and pale pink reef material, with areas of pale sand, turquoise reef flats, and some green vegetated patches. The central lagoon is bright blue to turquoise and open, while the outer rim appears rough, broken, or discontinuous in places with several narrow gaps; small low islets may sit on parts of the ring.

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