Fossilised plankton, SEM

Fossilised plankton, SEM

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Credit: DEE BREGER/SCIENCE PHOTO LIBRARY

Caption: Fossilised plankton. Coloured scanning electron micrograph (SEM) of the fossilised shell of Globolotalia menardii, a unicellular marine planktonic organism. The shell contains a pore (centre) through which the animal can extend branching pseudopodium in order to catch particles of food. Foraminiferan (single-celled micro- organism) deposits are the main constituent of chalk (limestone). They are important zonal fossils, being used to define the units of rock in which they are preserved. Magnification: x154 at 6x9cm size.

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Keywords: ancient, animal, aquatic, chalk, coloured, foraminifera, foraminiferan, fossil, fossilised, globolotalia menardii, invertebrate, invertebrates, limestone, marine, nature, old, palaeontology, paleontological, paleontology, plankton, prehistoric, preserved, protozoa, protozoan, scanning electron micrograph, sem, wildlife, zonal, zone, zoology, zooplankton

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