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Monday, Dec 05, 2022

China: Scientists find 192m-deep sinkhole with ‘well-preserved primitive forest’

Apart from China, Mexico, Papua New Guinea, and parts of the US have reported occurrences of sinkholes.

Cave explorers in China stumbled upon a massive sinkhole with a hidden forest inside in south China’s Guangxi region. (Credit: Wikimedia Commons/Ariel Steiner)

Cave explorers in China stumbled upon a massive sinkhole with a hidden forest inside in south China’s Guangxi region.

At its bottom, scientists found trees as tall as 40 metres — for comparison, coconut trees are usually around 20 to 30 metres tall — and the ground covered by dense plants, reported China’s state media Xinhua.

With this, the number of such sinkholes in Leye County has reached 30. However, what sets this sinkhole apart is its size — it measures 306 m (1,003 ft) in length, 150 m (492 ft) in width and 192 m (629 ft) in depth. Its volume exceeds 5 million cubic meters.

Quoting Zhang Yuanhai, senior engineer at the Institute of Karst Geology of China Geological Survey, the Chinese media house said the structure has three caves in its walls and a “well-preserved primitive forest” at its bottom.

The ancient trees growing at the bottom are nearly 40 meters high, and the dense shade plants are up to one’s shoulders, leader of the Guangxi 702 cave expedition team Chen Lixin told Xinhua.

As per reports, a team of scientists rappelled over 100 metres into the sinkhole and trekked hours to get to its bottom. They wound up the exploration on May 6 and returned to safety.

The US Geological Survey website defines a sinkhole as a “depression in the ground that has no natural external surface drainage.” They are typically found in “karst terrain” where the rocks below the land surface are soluble in groundwater.

Apart from China, Mexico, Papua New Guinea, and parts of the US have reported occurrences of sinkholes.

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First published on: 20-05-2022 at 12:28:07 pm
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