DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of Fine silica (glass) reticulate pumice formed from molten lava. Molten lava containing high amounts of gas cool rapidly to form this very light-weight and fragile pumice. Pieces of reticulite can be carried in the wind. The lava from Hawaii's active volcano contains over 60% silica (glass). Magnification: x14 when shortest axis printed at 25 millimetres.
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