The Sea Floor Is Younger Or Older At The Mid Ridge

Core a1 has 2 88 meters m of clay and siliceous ooze covering 4 86 m of pillow basalt.

The sea floor is younger or older at the mid ridge.

When a hotspot is involved it will push away the old sea floor to make room for. Core b1 has 2 37 m of muddy clay ooze covering 3 57 m of basalt. Radiometric dating shows that the sea floor closer to the mid ocean ridge are younger than the ones farther. Although oceanic crust has been forming on earth for over 4 billion years all of the sea floor older than about 200 million years has been recycled by plate tectonics.

Convection what process is occurring in the mantle in this diagram. The seafloor drilling system led to the evidence that supports the seafloor spreading hypothesis. As new seafloor forms and spreads apart from the mid ocean ridge it slowly cools over time. The old rocks were also denser and thicker compared to the thinner and less dense rocks in the mid.

For that geologists date and study continental crust. Older seafloor is therefore colder than new seafloor and older oceanic basins deeper than new oceanic basins due to isostasy. Because of this correlation between age and subduction potential very little ocean floor is older than 125 million years and almost none of it is older than 200 million years. Core c1 has 2 11 m of clay and siliceous ooze above 3 2 m of basalt.

This activity consists of naming the continents identifying mid ocean ridges and determining the age of the ocean floor. The samples obtained from the seafloor drill reveals that the rocks away from the mid oceanic ridge were relatively older than the rocks near to it. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor. Which core is closest to the mid ocean ridge.

The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american. Core d1 has 1 87 m of siliceous ooze over 2 54 m of basalt. New rock material added to the edges of the south american and african plates at the mid atlantic ridge has separated the two continents. Therefore seafloor dating isn t that useful for studying plate motions beyond the cretaceous.

The age of the seafloor farther away from the mid ocean ridge is younger older than the age of the seafloor closer to the mid ocean ridge.