ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Sandstone. Polarised light micrograph of a thin section of sandstone. Sandstone is a type of sedimentary rock, one formed from the deposition over time of small particles of other rocks. Pressure from overlying layers compacts the particles together to form a solid substance. Magnification: x11 at 4x5 inch size.
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