Calcareous phytoplankton fossil, SEM

Calcareous phytoplankton fossil, SEM

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Caption: Calcareous phytoplankton fossil. Coloured scanning electron micrograph (SEM) of a fossil of the skeleton (coccosphere) of a coccolithotrope, a small marine algal organism. The coccosphere consists of plates (coccoliths) of calcium carbonate. These skeletons can make up the major component of a limestone rock. This fossil was found in chalk in Rochester, Kent, UK, that was laid down in the Cretaceous period, between 142 and 65 million years ago. Magnification: x5500 when printed at 10 centimetres wide.

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Keywords: alga, algal, animal, biological, biology, calcareous, calcium carbonate, chalk, coccolith, coccolithotrope, coccoliths, coccosphere, coloured, cretaceous, false-coloured, flagellate, fossil, fossilised, geological, geology, invertebrate, invertebrates, kent, limestone, nature, phytoplankton, protozoa, protozoan, rochester, scanning electron micrograph, scanning electron microscope, sem, skeleton, wildlife, zoological, zoology

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