They are created in a process known as, subduction.
A deep ocean trench is a deep underwater canyon. It is found at the deepest parts of the ocean. It is long, thin, and has steep sides.
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.
The Mariana Trench in the Pacific Ocean which is 10,911 meters deep (35,798 feet or 6.78 miles).
A sea canyon is a deep, steep-sided valley on the ocean floor that has been carved out by underwater currents and geological processes. These canyons can be thousands of meters deep and are often hotspots for biodiversity due to the unique habitats they provide.
A large underwater area between continents is called a submarine canyon. These are deep, steep-sided valleys cut into the seafloor by turbidity currents, often connecting continental shelves to the deep ocean. They can be thousands of meters deep and hundreds of kilometers long.
A valley that is underwater.
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 valley that is underwater.
Glen Canyon is approximately 710 feet deep, or approximately 220 meters deep. The canyon, with the Glen Canyon Dam, can hold 5,370,000 cubic yards for water.
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A canyon is a deep narrow valley.
A deep valley could be called a canyon, such as the Grand Canyon.