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World's Deepest Underwater Cave Discovered

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Author Topic: World's Deepest Underwater Cave Discovered  (Read 358 times)
Artemis
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« on: October 01, 2016, 06:33:20 pm »

 During a 2014 dive, Starnawski reached 656 feet (200 m) deep, which he believed to be the bottom of the underwater cave. However, he found a narrow opening that led to another vertical tunnel extending beyond the probe Starnawski was using to measure the cave's depth — the line ran out at 1,260 feet (384 m), just shy of Pozzo del Merro, which measures 1,286 feet (392 m) deep. [Amazing Caves: Pictures of the Earth's Innards]

"He is a deep-cave diver, so he was keen to explore the deepest parts of the system," Marcin Jamkowski, a member of the expedition team and an adventure filmmaker, told Live Science.
With the assistance of an ROV, the expedition team was able to measure the cave's depth and explore the bottom of the limestone abyss.
With the assistance of an ROV, the expedition team was able to measure the cave's depth and explore the bottom of the limestone abyss.
Credit: Photograph by Marcin Jamkowski/National Geographic

Returning to the cave last year, Starnawski found the narrow passage had widened and he was able to squeeze through to a depth of 869 feet (265 m). He released another probe, this time hitting "bottom" at 1,214 feet (370 m), which was likely the top of debris from the collapsed passage.

A dive on Tuesday (Sept. 27) finally determined the cave's actual, record-breaking depth. The expedition team used ROV technology to reach the base of the cave, because depths past 400 meters are beyond the limits of scuba diving, Jamkowski said.

"There had been some dives done by the oil industry to such depths (so-called "saturation diving"), but they last approximately a month, surface to surface," Jamkowski wrote in an email. "This can never be done in the cave like this one, so the obvious choice was to send the robot where the man can't go."

Once the team explored the cave's depths, they found fallen trees, logs and branches at the bottom, suggesting the cave had changed its shape, according to Jamkowski. The configuration of the current shaft would not accommodate natural debris to fall from the cave's entrance, he said.

They also found the cave to be surprisingly large, as it appears to follow a natural rock feature or a fault line "eaten by the hot water going from the deep spring," Jamkowski said. The team plans further exploration and research into the cave.

Original article on Live Science.
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