TED KINSMAN / SCIENCE PHOTO LIBRARY TED KINSMAN / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of volcanic ash from Alaska, USA. Volcanic ash consists of rock, minerals and volcanic glass fragments. It is created during explosive eruptions by the shattering of large rocks and the separation of molten rock into tiny pieces. Magnification: 5,050x @ 15um wide.
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