Foraminiferan fossil, SEM

Foraminiferan fossil, SEM

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Foraminiferan fossil. Coloured scanning electron micrograph (SEM) of the fossilised shell (test) of a foraminiferan. Foraminifera are single-celled marine protozoa that construct and inhabit a calcium carbonate shell composed of several chambers. The shells form an important component of chalk. In past geological ages, foraminifera were so numerous that their shells have formed immense fossil deposits, seen today as limestone. This fossil was found in chalk laid down in the Cretaceous period, between 142 and 65 million years ago, at Rochester, Kent, UK. Magnification: x250 when printed at 10 centimetres wide.

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Keywords: animal, aquatic, biological, biology, britain, british, calcium carbonate, chalk, coloured, cretaceous, false-coloured, fauna, foraminiferan, fossilised, geological, geology, invertebrate, invertebrates, kent, marine, nature, one, plankton, planktonic, protozoa, protozoan, rochester, scanning electron micrograph, scanning electron microscope, sem, shell, single, test, uk, united kingdom, wildlife, zoological, zoology

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