These canyons are often carved by rivers that once flowed across the continental shelf when sea levels were lower. As sea levels rose, these rivers eroded their channels, forming canyons that extend out into the deeper ocean.
Here's why they are called submarine canyons:
* Submarine: They are located underwater, beneath the surface of the ocean.
* Canyon: Their shape resembles canyons on land, with steep sides and a narrow, deep channel.
Some other terms you might encounter are:
* Underwater canyons: A general term for canyons that exist beneath the ocean surface.
* Shelf canyons: Specifically refer to canyons that are located on the continental shelf.
* Slope canyons: Specifically refer to canyons that are located on the continental slope.
It's worth noting that submarine canyons can also be formed by other processes, such as tectonic activity and turbidity currents. However, the most common origin is from the erosion of former river channels.
