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51.1 MB (51.0 MB compressed)
3456 x 5163 pixels
29.2 x 43.7 cm ⏐ 11.5 x 17.2 in (300dpi)
MARK WILLIAMSON / SCIENCE PHOTO LIBRARY MARK WILLIAMSON / SCIENCE PHOTO LIBRARY
A sign at a quarry in Essex, UK, warning of the danger of quicksand. Quicksand is a mixture of water and a granular material, such as sand, silt or clay; a saturated sediment or liquefied soil that cannot support any significant weight (e.g. that of a person or vehicle).
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