Coral reefs


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(Phys. Geog.) reefs, often of great extent, made up chiefly of fragments of corals, coral sands, and the solid limestone resulting from their consolidation. They are classed as fringing reefs, when they border the land; barrier reefs, when separated from the shore by a broad belt of water; atolls, when they constitute separate islands, usually inclosing a lagoon. See Atoll.

See also: Coral

References in classic literature ?
Originally these islets had been mere sand-banks and coral reefs awash in the sea or shallowly covered by the sea.
They walled the confines of their coral reefs and sand-banks with coral-rock stolen from the mainland on dark nights.
There are zigzag lines on it, just like your temperature on a card, and these are probably roads in the island, for the Neverland is always more or less an island, with astonishing splashes of colour here and there, and coral reefs and rakish-looking craft in the offing, and savages and lonely lairs, and gnomes who are mostly tailors, and caves through which a river runs, and princes with six elder brothers, and a hut fast going to decay, and one very small old lady with a hooked nose.
Moist climate, coral reefs, sharks, Port Blair, convict-barracks, Rutland Island, cottonwoods--Ah, here we are.
The coloured map appended to my volume on Coral Reefs, led me to conclude that the great oceans are still mainly areas of subsidence, the great archipelagoes still areas of oscillations of level, and the continents areas of elevation.
I am refreshed and expanded when the freight train rattles past me, and I smell the stores which go dispensing their odors all the way from Long Wharf to Lake Champlain, reminding me of foreign parts, of coral reefs, and Indian oceans, and tropical climes, and the extent of the globe.
He may even now--if I may use the phrase--be wandering on some plesiosaurus-haunted Oolitic coral reef, or beside the lonely saline lakes of the Triassic Age.
two volcanic islands emerged of unequal size, surrounded by a coral reef that measured forty miles in circumference.
is raised, and some long mistake, some complicated edifice of self-delusion, over- confidence, and wrong reasoning is brought down in a fatal shock, and the heart-searing experience of your ship's keel scraping and scrunching over, say, a coral reef.
He has no idea, poor wretch, of the spiritual destitution of a coral reef in the Pacific or what it costs to look up the precious souls among the coco-nuts and bread-fruit.
In some cases the titles had been altered: "Finis," for instance, being changed to "The Finish," and "The Song of the Outer Reef" to "The Song of the Coral Reef.
Davao City - A team that includes representatives from the University of the Philippines is looking at ways to replace humans in mapping coral reefs through open-source robots deployed in Mindoro.

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