The Kess Kess are impressive features representing old (Devonian) mud volcanoes. Actually they are made up of carbonates and, in detail, of micritic limestone with crinoids. These features have been extensively studied but they are still far from being understood. Fluid inclusions suggest the presence of methane during their formation at a temperature around 100° C. Chemosynthetic fauna as been observed and analysed.
The nature of the Kess Kess and their astrobiological potential has not yet been investigated.
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