How Old Is the Oldest Ocean Floor
The Youngest Crust (Shown in Red) Is Near Mid Ocean Ridges and Spreading Zones. All Three Rock Types in the Earth’s Crust—Igneous, Sedimentary, and...
The youngest crust (shown in red) is near mid ocean ridges and spreading zones. All three rock types in the earth’s crust—igneous, sedimentary, and metamorphic—can also be recycled back to their original molten magma form. This process occurs when oceanic crust is pushed back into the mantle at subduction zones.
Which ocean is the oldest?
The Pacific
The Pacific is the oldest of the existing ocean basins. Its oldest rocks have been dated at about 200 million years.Feb 26, 2021
Why do the oldest dates of the ocean floor go back only about 200 million years when we know the ocean has been on Earth for billions of years?
While the Earth’s continental crust can exist for billions of years, movement of tectonic plates causes subduction, which is when the ocean crust is shoved down into the molten mantle. So the ocean floor rarely lasts longer than 200 million years.
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
