An oceanic trench is a long and narrow depression in the ocean floor.
What happens to the ocean floor in deep ocean trenches.
Narrow flat abyssal.
Typical slopes range between 4 and 16 although slopes as steep as 45 have been measured in the tonga trench of the equatorial south pacific.
These trenches are considered the deepest part of the ocean floor occurring at the boundary between convergent plates and lithospheric plates.
On a trench s outer slope the oceanic side the slope is gentle as the plate gradually bends into the trench.
Ocean trenches are deep cracks in the ocean floor that can extend down into very long valleys.
Oceanic trenches typically extend 3 to 4 km 1 9 to 2 5 mi below the level of the surrounding oceanic floor.
Deep sea trenches and their approaches are striking features on the ocean floor.
In general the cross sections of deep sea trenches are v shaped with steeper landward sides.
The deepest ocean trench is called the challenger deep part of the mariana trench in the pacific.
Ocean trenches formed by this continental oceanic boundary are asymmetrical.
The deepest ocean depth to be sounded is in the challenger deep of the mariana trench.