enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Coral reef - Wikipedia

   en.wikipedia.org/wiki/Coral_reef

   A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. [1] Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and ...

3. Geology of Barbados - Wikipedia

   en.wikipedia.org/wiki/Geology_of_Barbados

   The geology of the island Barbados includes exposures of reef-related carbonate rocks spanning 85 percent of the island's surface. This coral rock formation is 70 meters thick and dates to the Pleistocene. Unlike neighboring islands in the Lesser Antilles volcanic arc, Barbados is unusual because it is not a volcanic island (the only volcanic ...

4. Marine biogenic calcification - Wikipedia

   en.wikipedia.org/wiki/Marine_biogenic_calcification

   The resulting structures, such as shells, skeletons, and coral reefs, function as protection, support, and shelter and create some of the most biodiverse habitats in the world. Marine biogenic calcifiers also play a key role in the biological carbon pump and the biogeochemical cycling of nutrients, alkalinity , and organic matter.

5. The Structure and Distribution of Coral Reefs - Wikipedia

   en.wikipedia.org/wiki/The_Structure_and...

   Canton Island typifies the isolated coral atolls dotting the Pacific Ocean. The Structure and Distribution of Coral Reefs, Being the first part of the geology of the voyage of the Beagle, under the command of Capt. Fitzroy, R.N. during the years 1832 to 1836, was published in 1842 as Charles Darwin's first monograph, and set out his theory of the formation of coral reefs and atolls.

6. Biorock - Wikipedia

   en.wikipedia.org/wiki/Biorock

   Biorock forming on rebar in seawater in the presence of a small electric current to form an electrified reef. Biorock (also seacrete [1]) is a cement-like engineering material formed when a small electric current is passed between underwater metal electrodes placed in seawater causing dissolved minerals to accrete onto the cathode to form a thick layer of limestone.

7. Petoskey stone - Wikipedia

   en.wikipedia.org/wiki/Petoskey_stone

   A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized rugose coral, Hexagonaria percarinata. [1] Such stones were formed as a result of glaciation, in which sheets of ice plucked stones from the bedrock, grinding off their rough edges and depositing them in the northwestern (and some in the northeastern) portion of Michigan's lower peninsula.