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Massive Water Reservoir in Deep Earth
March 30 , 2026
11 hrs 0 min
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- Scientists have discovered a huge water reservoir nearly 700 km below Earth’s surface inside the mantle, changing ideas about Earth’s water origin.
- The water is not in liquid form but is chemically trapped inside a high-pressure mineral called ringwoodite in the mantle.
- This region is called the transition zone, located between 410 km and 660 km deep below the Earth’s crust.
- Scientists detected this water using seismic wave studies, as waves slow down in water-rich regions, and by studying mineral samples from volcanic activity.
- The hidden reservoir may contain more water than all oceans combined, but it is locked inside rocks and not freely flowing.
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