What is a deep crack carved into the continental shelf and slope called?

A deep crack carved into the continental shelf and slope is called a submarine canyon. These canyons are formed by processes such as erosion from sediment-laden currents and underwater landslides. They can extend into the deep sea, creating steep, narrow valleys that significantly influence oceanic sediment transport and marine ecosystems. Submarine canyons are often associated with river systems that deliver sediment to the ocean.