Oldest water (non meteoritical)

On 13 December 2016, a team of scientists led by Barbara Sherwood Lollar (Canada) presented results at a meeting of the American Geophysical Union that showed the discovery of two-billion-year-old water 3 km below the Earth’s surface in Kidd Creek Mine, Timmins, Ontario, Canada. Ancient water that becomes trapped at this depth in the crust can preserve evidence of the conditions at the time at which it became trapped. Dissolved elements including helium, neon, krypton, xenon and argon allowed analysis of the age of the water, which is also around eight times saltier than sea water.