coccolith


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Related to coccolith: Foraminifera, Coccosphere, radiolarian

coc·co·lith

 (kŏk′ə-lĭth′)
n.
Any of several minute calcite plates that make up the external covering of certain haptophyte phytoplankton and in a fossilized state form chalk and limestone deposits.

[cocc(us) (from its shape) + -lith.]

coccolith

(ˈkɒkəlɪθ)
n
(Geological Science) any of the round calcareous plates in chalk formations: formed the outer layer of unicellular plankton
[C19: New Latin, from Greek kokkos berry + lithos stone]

coc•co•lith

(ˈkɒk əˌlɪθ)

n.
a microscopic calcareous disk or ring making up part of the covering of certain marine plankton and forming much of the content of chalk rocks.
[1865–70; < New Latin Coccolithus orig. a genus name; see coccus, -o-, -lith]
coc`co•lith′ic, adj.
References in periodicals archive ?
The deeper-water formations, namely the Montpelier Formation (consisting of bedded chert) and the Pelleu Island Formation (which lacks chert), are essentially coccolith planktonic-foraminiferal chalky limestones (Mitchell 2004; Blissett 2006).
Lipid composition during growth of motile and coccolith forms of Emillania huxleyi.
However, when a molecule of calcium carbonate is formed in the upper ocean as part of a coccolith or planktonic foraminifer test, a molecule of C[O.
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.
Particularly disappointing for those favouring the early date is the suggested age range derived from marine coccoliths, also in OI stage 11.