coccolith


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Related to coccolith: Foraminifera, Coccosphere, radiolarian

coccolith

[′käk·ə‚lith]
(botany)
One of the small, interlocking calcite plates covering members of the Coccolithophorida.
References in periodicals archive ?
The central protagonist of this story is an anthropomorphic representation of the microscopic unicellular plankton (coccolithophores) whose test consists of calcium carbonate scales (coccoliths); beds of chalk are the result of the accumulation of these coccoliths on the ocean floor over millions of years.
We examined coccolithophore cell concentration, diversity, and coccolith morphology as well as physicochemical parameters with an emphasis on seawater carbonate chemistry.
Notes on Neogene calcareous nannofossil biostratigraphy of the Ontong Java Plateau and size variations of Reticulofenestra coccoliths.
As soon as they leave the upper ocean where they are produced, almost all of the coccoliths and foraminifera settle to the deep ocean floor within a short time.
The algae form pale chalky cases called coccoliths, which during the spring bloom can be seen, from space in the seas around the UK.
Other promising proxies are: the Sr/Ca ratio in coccoliths, which correlates with rates of organic carbon fixation and calcifcation; [delta][sup.
Nicholls (1979), using X-ray emission spectra, has shown that the scales are composed of silica, but not calcified, and hence do not represent coccoliths.
Nannoplankton fruto the Galapagos Islands: Michaelsarsia elegans Gran and Haloppapus adriaticus Schiller (coccolithophorids) with special reference to coccoliths and their unmineralized comoponents.
More than 80% of the coccoliths that accumulate in the sediments of the Mediterranean are E.