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Images Dated 31st October 2017

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Choose from 13 pictures in our Images Dated 31st October 2017 collection for your Wall Art or Photo Gift. Popular choices include Framed Prints, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.

Afar salt miner preparing salt blocks at Lake Assal

Afar salt miner with his camel at Lake Assal

Afar salt miner cutting salt blocks at Lake Assal

Hydrothermal field at Dallol volcano in the Danakil Depression

Featured 31 Oct 2017 Print

Hydrothermal field at Dallol volcano in the Danakil Depression

Hydrothermal field at Dallol volcano in the Danakil Depression. At 48 metres below sea level, Dallol is Earth's lowest land volcano. Its craters contain hot springs that boast a whole range of otherworldly colours - including neon yellow - thanks to the hot magma bubbling below the surface. This magma heats the groundwater that flows into the area from the nearby highlands, and as the heated groundwater moves up towards the surface, it dissolves salt, sulphur, potash and other minerals and deposits them in the Dallol craters. The supersaturated brine emerges through hot springs in the floor of the craters. As the brines evaporate in the hot arid climate, extensive salt formations are formed on the floor of the craters. These are coloured white, yellow, brown, orange and green by sulfur, dissolved iron, mud and the life activity of halophile algae. Ethiopia