Dallol hydrothermal field

The geothermal area is situated in the Danakil Depression of northern Ethiopia. It occupies a volcanic crater in one of the lowest and hottest inhabited places on Earth. The remote location lies within the Afar Triangle, a highly active geological region.

The landscape features striking yellow, green, and orange hues caused by a combination of sulfur, iron, and various mineral salts. As superheated water rises from the magma below, it dissolves these minerals and brings them to the surface. When the acidic pools evaporate, they leave behind brightly colored salt and mineral crusts.

The boiling mudpots and acidic springs in the area reach incredibly high temperatures, often exceeding 100 degrees Celsius. The water is also highly acidic, with some pools having a pH of less than 1. These extreme conditions make the site one of the most inhospitable environments on the planet.

Scientists have discovered extremophile microorganisms living within the extreme heat and acidity of the pools. These tiny lifeforms survive without oxygen by feeding on the abundant sulfur and iron present in the geothermal water. The study of these organisms helps astrobiologists understand how life might survive on other planets.