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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.
Are oceanic rocks billion years old?
No. Oceanic crust is recycled into the mantle through a process called subduction and new ocean floor is formed at mid-ocean ridges. None of the ocean floor is more than about 180 million years old. Some rocks on the continents are billions of years old.
North Atlantic Ocean basin age what is it?
180 million years old
What age is the south Atlantic ocean basin?
It is 180 Million Years Old
How old are the oldest rocks on the ocean floor compared to the age of the earth?
In 1990, after 20 years of searching, geologists found the oldest oceanic rocks by drilling into the seafloor of the western Pacific. These rocks turned out to be about 200 million years old, only about 4% of the Earth's age.
Where does the ocean floor go to after 180 million years?
Where old oceanic crust meets continental crust or younger oceanic crust at a convergent plate boundary it gets forced down into the mantle. This process does not necessarily happen when the crust is 180 millions years old. Rather, the oldest oceanic crust is found along the edges of the Atlantic ocean, dating to when it first formed in the Jurassic period.
What is the age of the oldest ocean?
The oldest oceanic crust is in the west Pacific and north-west Atlantic. They are about 180 to 200 million years old.
What is older the continents or the ocean floor?
On average, continents are older than ocean basins. Due to the action of plate tectonics, ocean crust is being formed and destroyed continuously. The oldest oceanic crust is about 200 million years old, whereas continents, which are less dense than oceanic crust and tend not to be subducted into the mantle, can be more than 3,000 million years old in places.
When did Pangaea exist?
From about 300 million years ago to 180 million years ago.
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 oldest ocean?
The oldest ocean, geologically, is the Panthalassa Ocean which was around 220 million years ago in the Triassic era. It encompassed the whole Earth except the land mass Pangea. See related link for more information.
When did the dinosaurs live on earth?
From about 180 million years ago until about 65 million years ago.
