It is known as a trench, which is the lower part of the ocean. The deepest trench is the Marina Trench.
It's often called a trench.
It could be called a trench, crevice, ocean ridge, or abyss.
A valley that is underwater.
An ancient under sea valley carved in the ocean floor is known as a canyon, usually given the name of the contributory river on the land. such as the Hudson Canyon, or the Clutha Canyon.
A valley that is underwater.
It is The Marianas trench it is the deepest underwater canyon and i believe the longest at 1580 miles.The mid atlantic ridge stretches 10,000 miles!
They are created in a process known as, subduction.
A valley underwater is called a submarine canyon. These can form through a variety of geological processes, such as erosion by underwater currents or the collapse of underwater sediment. Submarine canyons can be important habitats for a diverse range of marine life.
A submarine canyon is a deep, steep-sided valley cut into the seabed of the continental slope, often formed by underwater currents. It can be a conduit for sediment transport from the shelf to the deep ocean.
You are probably looking for "trench".
It is known as a trench, which is the lower part of the ocean. The deepest trench is the Marina Trench.
The river had carved a wide canyon through the relatively softer sedimentary rock. Cell phones rely on a direct line of sight, and may not work in a mountain canyon.