# An Entire Ocean Could Be Trapped In Rock 400 Miles Below Your Feet

> We tend to think of Earth's water as something that normally exists on the surface — or at least close to it. Sure, groundwater exists, but even that typically sits between 500 and 1,000 meters below the Earth's…

- **Source:** [SlashGear](https://www.slashgear.com/2127150/underground-ocean-trapped-ringwoodite/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=69c2b30490fa83fb33a3f08f)
- **Published:** 2026-03-24
- **Category:** Science
- **Tags:** #surface #below #close #earth #entire #exists #feet #miles
- **Canonical:** http://localhost:4321/a/69c2b30490fa83fb33a3f08f

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._