Yongle Blue Hole (YBH)
Carbon more than 8,000 years old lies deep inside a yawning sinkhole in the South China Sea.
About YBH:
- It is the deepest known marine cavern.
- Located in the Xisha Islands of the South China Sea (SCS).
- It measures roughly 300 meters from top to bottom.
- Its waters are mostly isolated from the surrounding ocean and receive little fresh water from rainfall, making it a rare spot to study the chemistry of oxygen-deprived marine ecosystems.
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