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The oldest rock in oceanic crust is that which is found the greatest distance from a mid-ocean-ridge.
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∙ 12y ago
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Why is the earth 4.6 billion years old but the oldest sea floor is only 180 millions years old?
Just as new sea floor forms at mid-ocean ridges, new sea floor is forced back into the mantle at abduction zones. The oldest seafloor is at east and west the edges of the Atlantic Ocean, dating to the breakup of Pangaea.
What is the process that creates new ocean crust to form molten rock?
Sea Floor Spreading
What happens to the old ocean floor as the sea floor spreads?
As the sea floor spreads, the old ocean floor gets pushed out, which makes the plates move.
What is the vertical section of the ocean from the surface to the ocean floor referred to as?
This section of the ocean from floor to surface is called the water column.
What happens to an earthquake when it travels from its source to the ocean floor?
the ocean floor starts to break up just like the land does .
Where does the oldest rock take place at on the ocean floor in sea-floor spreading?
Far from the mid oceanic ridge, near the continental margin (oldest oceanic rock ages 200 mya)
What happens when the plate motions compresses part the crust?
where do you expect to find the oldest rock on the ocean floor
Where would you expect to find oldest rock on the ocean floor?
Somewhere at the bottom of the Marianas Trench you would find the oldest rock of the oceanic crust. Somewhere else, however, there are older rocks on the ocean floor--those deposited by icebergs that have broken off of glaciers. Those erratic rocks could be much older than the oldest oceanic crust.
What happen to the oldest rock on the ocean floor to continue the rock cycle?
Or they get subducted and re-enter the mantle or they get obducted onto continent (the latter being called an ophiolite).
Where would you expect to find the oldest rock on the oldest floor?
Somewhere at the bottom of the Marianas Trench you would find the oldest rock of the oceanic crust. Somewhere else, however, there are older rocks on the ocean floor--those deposited by icebergs that have broken off of glaciers. Those erratic rocks could be much older than the oldest oceanic crust.
How would the age of the oldest rocks on the continents compare with the age of the oldest rocks on the seafloor if the rock on the continents is continually formed but not removed?
The oldest rocks on the continents would be much older than the rocks on the sea floor because the rocks on the continents are not being removed unlike the rocks on the sea floor that are made by the mid-ocean ridge are being removed by deep ocean trenches. this prossess that is occuring on the sea floor is called sea floor spreading. evidence of this is the Pacific ocean shrinking and the Atlantic ocean growing.
Is the mid ocean ridge the location of the oldest ocean floor?
Actually the mid ocean ridge would be the location of some of the NEWEST ocean floor.
Where would you expect to find the oldest on the ocean floor?
Somewhere at the bottom of the Marianas Trench you would find the oldest rock of the oceanic crust. Somewhere else, however, there are older rocks on the ocean floor--those deposited by icebergs that have broken off of glaciers. Those erratic rocks could be much older than the oldest oceanic crust.
Why are the oldest parts of the ocean floor no older than about 200 million years.?
Because the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
Why are the oldest part of the ocean floor no older then about 200 million years old?
The ocean is 4 billion yars old, however due to subduction, the oldest sediment found in the ocean's floor is 180 million years old.
How does one acquire rock samples of the ocean floor?
Deep ocean floor samples can be obtained by submersibles.
How is new rock added to the ocean floor?
usually from lava sinking to ocean floor and cooling.
