What are steep depressions in the deepest portions of the oceans called?
Answer Trenches
The deepest 45% of the world's oceans are comprised of trenches with depths surpassing 6,000 meters (almost 20,000 feet) and are called "hadal zones," after Hades, the Greek god of the underworld.
Asked by Vasilii Kulev · Last updated 3 years ago · 14.9K views · SOURCE
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