Diatomaceous Earth, SEM

Diatomaceous Earth, SEM

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Caption: Diatomaceous Earth. Coloured scanning electron micrograph (SEM) of diatomaceous earth consisting of fossilized diatoms. This sample is from Loch Cuithir on the Isle of Skye, Scotland. Diatoms are single-celled planktonic algae. The diatoms create a shell (frustule) of silica around themselves for protection and support which is readily fossilised. Rock formed from diatom shells is called diatomite or diatomaceous earth. It is used industrially as a filter for purifying liquids. Magnification x290 at 10cm wide.

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Keywords: algae, diatom, diatomaceous earth, diatomite, fossilized, fossils, frustule, isle of skye, lock cuithir, plankton, scanning electron micrograph, scanning electron microscope, scotland, sem, shell, silica, single-celled

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