Where Is The Oldest Ocean Floor Located
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The ocean crust then spreads out enlarging the ocean.
Where is the oldest ocean floor located. Why are there no oceanic rocks older than 200 million years. The oldest ocean floor is located near the continents next to a subduction zone. Where is the oldest ocean floor located. The oldest parts of the oceanic crust are found farest from the mid ocean ridges at subduction zones and continental shelves.
This continual motion is evidenced by the occurrence of earthquakes and volcanoes. The oldest continental rocks are found in cratons. A craton is a stable part of the continental lithosphere which has survived several cycles responsible for the merge and the dislocation of supercontinents. There are rocks on every continent that are 3 to 4 billion years old.
Cratons are therefore always found within continents. Check answer oceanic crust is eventually destroyed in subduction zones. The youngest ocean floor is located on the mid ocean ridge. The ocean floor is a mysterious place that marine geologists and oceanographers have struggled to fully grasp.
The tectonic plates are constantly in motion and new surfaces are always being created. New ocean crust is formed at the mid ocean ridges. Some cratons in canada and greenland shelter the oldest continental rocks in the world about 4 billion years old. The farer away from the ridge the ocean crust is the older the crust is.
You may have heard this fact before and while true. The mid atlantic ocean ridge is young ocean floor. There are rocks on every continent that are 3 to 4 billion years old. The mediterranean sea is home to what could be the world s oldest oceanic crust an undisturbed section of earth s outermost shell that scientists say is about 340 million years old.
This is because the oldest sea floor is subducted under other plates and replaces by new surfaces. Although oceanic crust has been forming on earth for over 4. The oldest ocean floor is located near the continents next to a subduction zone. The new crust is then pushed away from the ridge as newer crust comes to the surface.
The crust overlies the solidified and uppermost layer of the mantle the crust and the solid mantle layer together constitute oceanic lithosphere.
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