Danakil Depression, Ethiopia

October 23, 2007


Provided and copyright by: Joel Balazuc
Summary author: Joel Balazuc

The photo above shows the arid Danakil Depression (a lava lake of the former Erta Ale volcano) in the East African Rift Zone of Ethiopia, where at 394 ft (120 m) below mean sea level numerous mineral springs are evident. Here, water is recycled through almost 2,950 ft (900 m) of saline deposits. In the hot dry air, this water readily evaporates, leaving deposits of white halite (common salt) and green melanterite (hydrated iron sulfate), which becomes yellow and orange when oxidized (as copiapite). Potash, gypsum and borax deposits are also present. In the background, the small cones build by the springs measure just 20 to 32 in (50 to 80 cm). Photo taken on February 16, 2007.

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