deep sea canyons
The Marianas Trench, and many other deep undersea valleys, can be found on the ocean floor.
The ocean floor does have underwater mountains called seamounts and undersea valleys known as trenches. These features are created by tectonic plate movements and volcanic activity on the ocean floor.
They are both giant holes in the ground. Trenches are found underwater and valleys are found on land.
They are called trenches.
This is known as an oceanic trench.
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.
An underwater bubble blower.
The island of maui is covered with many valleys created from the underwater volcanoe when it erupted hundreds of years ago. It is called the valley island because if you were to fly over the island, the first feature you will notice are the multiple valley's covering the surface of the island. Compared to the other hawaiian islands(Kauai, Oahu, Lanai, molokai, Hawaii, etc.) Maui has the most valleys. So basically, Maui is valley island cause it is covered with valleys, though some are too small to be officially called a valley.
The most well known would be the Hawaiian island mountain range caused by underwater volcanic activity. Underwater.
They are called hanging valleys. The smaller glacier valleys are the hanging walls that join the deeper main valley called the U-shaped valley.
they are called valleys