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How do ocean ridges and deep-sea trenches support the theory of sea floor spreading?
Ocean ridges and deep-sea trenches support the theory of sea floor spreading through the process of plate tectonics. At ocean ridges, new oceanic crust is formed as magma rises and solidifies, pushing the existing crust apart. Deep-sea trenches are areas where old oceanic crust is being subducted back into the mantle, completing the cycle of sea floor spreading. This continuous movement of crust at ridges and trenches provides evidence for the theory of sea floor spreading and the movement of tectonic plates.
Sea floor is destroyed in which plate boundry?
The sea floor is destroyed in subduction zones, where one tectonic plate is pushed beneath another. This process is responsible for the destruction of oceanic crust and the formation of deep ocean trenches.
What would the ocean floor look like if plate tectonics did not happen?
If plate tectonics did not happen, the ocean floor would likely be smoother and more uniform, without the presence of mid-ocean ridges, trenches, and seismic activity caused by plate movements. Mountain ranges and underwater volcanoes associated with tectonic activity would also be absent.
What percentage of the ocean bottom is covered by trenches?
Approximately 2.5% of the ocean bottom is covered by trenches, which are deep depressions in the ocean floor that form where tectonic plates collide and one plate is forced beneath the other. These trenches can be incredibly deep, with the Mariana Trench being the deepest known point in the ocean.
Are deep sea trenches vast underwater mountain chains?
No, deep sea trenches are not underwater mountain chains. Deep sea trenches are long, narrow depressions in the ocean floor formed by tectonic plate activity, while underwater mountain chains, known as mid-ocean ridges, are long mountain ranges on the ocean floor where tectonic plates are spreading apart.
Trenches are the deepest parts of the ocean floor which of the earth's four oceans hs the deepest trenches?
The Pacific Ocean has the deepest trenches.
What happens to the ocean floor at the deep ocean trenches?
what happens is the ocean floor does not just keep spreading.instead, it sinks beneath deep underwater canyons called deep- ocean trenches
Where does the sediment on the abyssal plain come from?
It comes from sea mounts and ocean trenches.
Where does Subduction take place on the ocean floor?
Subduction of the ocean floor takes place at trenches.
Subduction of the ocean floor takes place?
trenches
Why are the trenches on the ocean floor signifigant?
It eats you mother(:
What is the floor of the ocean called?
The floor of the ocean is called the seabed or ocean floor. It is made up of different features such as abyssal plains, trenches, ridges, and volcanoes.
Does theory continental drift state that new ocean crust is formed at ocean ridges and destroyed at deep sea trenches?
No, the theory is that Seafloor spreading state that the new ocean crust is formed at ocean ridges and is destroyed at deep sea trenches.
Why are trenches usually located at the edges of oceans?
the sharks are attracted by trenches which go to edges of ocean and bite holes in the ocean floor
Why does deep-ocean trench occur?
At deep-ocean trenches, subduction allows part of the ocean floor to sink back into the mantle. The ocean floor does not just keep spreading. Instead, it sinks beneath deep underwater canyons called deep-ocean trenches. Where there are trenches, subduction takes place.
Why does deep ocean trench occur?
At deep-ocean trenches, subduction allows part of the ocean floor to sink back into the mantle. The ocean floor does not just keep spreading. Instead, it sinks beneath deep underwater canyons called deep-ocean trenches. Where there are trenches, subduction takes place.
What is deep holes in the ocean floor called?
trenches
