Sulfur mining in Kawah Ijen
Taken June 4, 2009
This is an active volcanic greater with a turquoise-colored acid crater lake. An active vent at the edge of the lake is a source of sulfur. The volcanic gasses are channeled through a network of ceramic pipes, resulting in condensation of molten sulfur. The sulfur, which is deep red in color when molten, pours slowly from the ends of these pipes and pools on the ground, turning bright yellow as it cools. The cooled material is broken into large pieces and carried out in baskets by the miners.
EXIF data: model Canon EOS-1D Mark III, exposureTime 0.003 s (1/400) (1/400), fnumber f/5.0, isoEquiv 100, focalLength 85.00 (85/1)