Chadden Hunter / Dallol hot springs where water heated by magma laden with potassium, sulphur and iron spews up through salt pans staining the salt deposits with vivid colours, in the bottom of the Rift Valley, 120 me...

Ashley Cooper / Laguna Miluni a reservoir fed by glacial melt water from the Andean peak of Huayna Potosi. As climate change causes the glaciers to melt, the water supply for La Paz, Bolivia's capital city is rap...

Ashley Cooper / Colourful lakes below the peak of Chacaltaya, lake discoloured by mine effluent., Andes, Bolivia. October 2015.

Ashley Cooper / Laguna Miluni, contaminated with mine effluent and with a low level due to drought. This reservoir fed by glacial meltwater from the Andean peak, Huayna Potosi, Bolivian Andes. October 2015.

Ashley Cooper / Laguna Miluni, contaminated with mine effluent and with a low level due to drought. This reservoir is fed by glacial meltwater from the Andean peak, Huayna Potosi, Bolivian Andes. October 2015.

Ernie Janes / Painted cliffs at Maria Island National Park, east coast of Tasmania, Australia. January 2018. The iron oxides in the rock were left behind by ground water percolating through the cliffs. This created...

Ernie Janes / Unusual pattern of erosion in The Painted Cliffs at Maria Island National Park, east coast of Tasmania, Australia. January 2018. The iron oxides in the rock were left behind by ground water percolatin...

Ernie Janes / Boulders near the Painted Cliffs at Maria Island National Park, east coast of Tasmania, Australia. January 2018. The iron oxides in the rock were left behind by ground water percolating through the cl...

Ernie Janes / The Painted Cliffs at Maria Island National Park, east coast of Tasmania, Australia. January 2018. The iron oxides in the rock were left behind by ground water percolating through the cliffs. This cr...

Ernie Janes / The Painted Cliffs at Maria Island National Park, east coast of Tasmania, Australia. January 2018. The iron oxides in the rock were left behind by ground water percolating through the cliffs. This cr...

Guy Edwardes / 2020VISION / Iron oxide staining from an outfall pipe on a beach, North Berwick, Northumberland, England, UK, November 2011.

Guy Edwardes / 2020VISION / Iron oxide staining from an outfall pipe on a beach, North Berwick, Northumberland, England, UK, November 2011.