Some of them live in underground rock salt deposits, including one from middle-late Eocene (38-41 million years ago). Some even older ones from more than 250 million years ago have been reported. Haloarchaea is also used to treat water that is high in salinity.
Certain microorganisms inhabit underground salt formations, such as the one from the Eocene epoch (38-41 million years ago). Additionally, ancient examples dating back more than 250 million years have been discovered. Haloarchaea is utilized to purify water that contains excessive salts.