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A new exploration of a legendary blue hole in the South China Sea has found that the underwater feature is the deepest known on Earth.
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According to Xinhua News, Dragon Hole, or Longdong, is 987 feet (300.89 meters) deep, far deeper than the previous record holder, Dean's Blue Hole in the Bahamas. (That blue hole measures about 663 feet, or 202 m, deep.) According to Xinhua, local legend holds that Dragon Hole is mentioned in the Ming dynasty novel "Journey to the West," in which a supernatural monkey character gets a magical cudgel from an undersea kingdom ruled by a dragon.
The findings have yet to be confirmed or reviewed by scientists in the field, but if they hold up, the measurements peg Dragon Hole as far deeper than Dean's Blue Hole, said Pete van Hengstum, a marine geologist at Texas A&M University at Galveston, who conducts research on blue holes and sinkholes throughout the Caribbean region. [See Photos of 8 Amazing Sinkholes]
Blue holes are water-filled sinkholes that form in carbonate rock such as limestone. Over long periods of time, the carbonate rock dissolves in the subsurface to form caves or cavities, van Hengstum told Live Science.
"Eventually, the process of dissolution causes the cave to reach very close to the Earth's surface, and if the cave ceiling collapses, a blue hole or sinkhole is formed," he said.
Some blue holes, like Dragon Hole, open up to the marine environment, while others are inland.
It's something of a mystery why blue holes form precisely where they do and what factors influence their development. Chemical reactions at the interface of saltwater and freshwater can create weak acids that eat away at limestone and other carbonates, said Lisa Park Boush, a geoscientist at the University of Connecticut who studies blue-hole sediments in the Bahamas. As a result, rising and falling sea levels can influence when and where blue holes form. [In Photos: Stunning Blue Holes from Around the World]
originally posted by: Spacespider
originally posted by: andy06shake
a reply to: Krazysh0t
Just better hope there is not a waffle at the bottom of there blue hole.
A blue waffle what is that ?
originally posted by: TheTory
Could nuclear tests create such a hole?