What is the deepest ocean trench called?

What is the deepest ocean trench called? The answer is the Mariana Trench.

The Mariana Trench is in the western Pacific Ocean, roughly 200 kilometres east of the Mariana Islands. Its deepest section is Challenger Deep, which reaches nearly 11,000 metres below sea level and is the deepest known point in Earth’s oceans.

The trench formed at a subduction zone, where the Pacific Plate is forced beneath the smaller Mariana Plate. As the older, denser oceanic crust bends downward, it creates the long, crescent-shaped depression and contributes to the volcanic island arc west of the trench.

The trench is often confused with Challenger Deep, but they are not exactly the same thing: Challenger Deep is the deepest part within the Mariana Trench. The Tonga Trench is also extraordinarily deep, but current measurements place it below the Mariana system’s maximum depth. The first crewed descent to Challenger Deep occurred in 1960 aboard Trieste.