Offshore Aquifers

  • In September 2025, a team of international scientists confirmed the presence of a massive offshore freshwater aquifer beneath the Atlantic Ocean, stretching from New Jersey to Maine.
  • Offshore aquifers are bodies of porous rock or sediment located beneath the sea floor that store freshwater, similar to aquifers on land.
  • They likely formed during past ice ages when sea levels were lower, or through connections with onshore aquifers, and are capped by compacted clay layers preventing saltwater intrusion.
  • The recently studied aquifer is estimated to hold enough water to supply a metropolis like New York City for 800 years, highlighting its ....
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