PHIL HILL / SCIENCE PHOTO LIBRARY PHIL HILL / SCIENCE PHOTO LIBRARY
Volcanogenic massive sulphide (VMS) ore deposit. This deposit was formed when the area was underwater. The sulphide minerals precipitated out of hydrothermal fluids. VMS ore deposits are rich in a number of metals including gold and copper. Photographed at the site of a former copper mine, Macalder, Kenya.
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