EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
Clay-based paint. Coloured scanning electron micrograph (SEM) showing silicate fossils in a sample of paint. Clays are used as pigments in many water-based paints to produce various different colours. They are a naturally occurring material composed mainly of fine-grained minerals and often contain many tiny fossils. Magnification: x7500 when printed 10 centimetres wide.
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