Often, it is hydrated mantle coming from the Earth's core
They are called trenches.
Shallow parts of the sea or ocean are called shoals or shallows. They are areas where the water depth is relatively shallow, making them potentially hazardous for navigation.
Most trenches are found in the Pacific Ocean basin. This is because the Pacific Plate is the largest tectonic plate on Earth and is actively subducting beneath other plates, leading to the formation of deep ocean trenches. The Mariana Trench, the deepest trench in the world, is located in the Pacific Ocean.
At spreading centers.
Deep-oceanic trenches are most abundant around the rim of the Pacific. Deep ocean trenches are surficial evidence for sinking of oceanic lithosphere into the mantle at a subduction zone.
within or adjacent to trenches
The word that describes the variation in ocean depth from shallow shelves to deep trenches is "bathymetry." Bathymetry refers to the measurement of underwater depths and the topography of the ocean floor. This term encompasses the study of submarine features such as continental shelves, abyssal plains, and oceanic trenches, providing insights into the diverse and dynamic nature of the Earth's oceans.
there are three ocean trenches in the Atlantic Ocean
The continental shelf is the shallow part of the ocean.
Trenches - 2010 Shallow Grave 1-5 was released on: USA: 22 February 2010
It comes from sea mounts and ocean trenches.
Trenches
The Pacific Ocean has the deepest trenches.
Giant squid primarily live in deep ocean trenches.
The average depth of the world ocean is approximately 12,080 feet (3,682 meters). This value includes both shallow coastal areas and deep ocean trenches, giving an overall average depth for the entire ocean.
They are called trenches.
in the ocean!