Running down the middle of this basin is a large ridge that rises up from the ocean floor about 10 000 feet.
Sea floor spreading diagram rift valley.
Seafloor spreading is happening at b.
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This creates new ocean crust.
Thus the depth to the sea floor increases with.
Theory of sea floor spreading.
Tension rods were placed in the cracks created by the rift valley.
As the rift valley spread the tension rods increased the length allowing the detection of the earth s spreading.
Also running down the middle of the mid ocean ridges is a narrow deep depression called a rift valley figure 4.
Ess sea floor spreading pdf.
Thus for fast spreading centers the ridge stands at higher elevations than for slow spreading centers.
Sea floor spreading answer key.
Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge.
This is a mid ocean ridge.
The theory is that the rift valleys will create new oceans so the detection of spreading in the rift valley provided evidence of seafloor spreading.
Ess sea floor spreading pdf.
The rift valley at fast spreading centers is narrower than at slow spreading centers.
Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
As oceanic lithosphere moves away from the ridge it cools and sinks deeper into the asthenosphere.
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.