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hadal zone

American  
[hay-duhl zohn] / ˈheɪ dəl ˈzoʊn /

noun

  1. the deepest region of the ocean, which is found within ocean trenches and begins at depths greater than about 6,000 m (19,680 ft).


Example Sentences

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Finally, there are the incredibly deep seafloor trenches known as the hadal zone, named after Hades, Greek god of the underworld.

From Scientific American Aug. 6, 2022

Since then, Dr Cui has set his eyes on the hadal zone in general, and in particular on the bottom of the Mariana trench.

From Economist Aug. 25, 2016

The hadal zone is one of the most poorly studied habitats on Earth.

From Nature Mar. 17, 2016

Among other things, the institute hoped to use the robot, which was a ‘hybrid’ capable of being controlled remotely and operating autonomously, to investigate the ocean’s hadal zone.

From Nature Dec. 8, 2015

"The hadal zone is 45% of the ocean's depth range. So the entire discipline of deep sea biology has concentrated on the shallowest 50% and that seems wrong," he said.

From BBC Jul. 16, 2014

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