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Sea floor spreading contributed to the breakup of Pangaea by creating new oceanic crust at mid-ocean ridges, causing the continents to drift apart. This process resulted in the formation of the Atlantic Ocean and the separation of the once-contiguous landmass Pangaea into multiple continents.

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How do ocean ridges and deep-sea trenches support the theory of sea floor spreading?

Ocean ridges and deep-sea trenches support the theory of sea floor spreading through the process of plate tectonics. At ocean ridges, new oceanic crust is formed as magma rises and solidifies, pushing the existing crust apart. Deep-sea trenches are areas where old oceanic crust is being subducted back into the mantle, completing the cycle of sea floor spreading. This continuous movement of crust at ridges and trenches provides evidence for the theory of sea floor spreading and the movement of tectonic plates.


Does sea floor spreading occur at a convergent boundary?

No, sea floor spreading does not occur at a convergent boundary. Sea floor spreading occurs at divergent boundaries where tectonic plates move away from each other, allowing magma to rise and create new oceanic crust. At convergent boundaries, two plates collide, leading to subduction or crustal deformation.


Are convergent boundaries and sea-floor spreading related in any way?

Yes, convergent boundaries and sea-floor spreading are related in the sense that sea-floor spreading can occur at divergent boundaries (where tectonic plates move apart), leading to the creation of new oceanic crust. This new oceanic crust can then be consumed at convergent boundaries (where tectonic plates collide), as one plate is subducted beneath the other.


How do you Calculation the rate of sea floor spreading examples?

The rate of sea floor spreading is calculated by measuring the distance between magnetic stripes on the sea floor, which are formed by the alternating polarity of Earth's magnetic field. By knowing the age of the sea floor rocks at different distances from a mid-ocean ridge, scientists can determine the spreading rate. For example, if the rocks at a certain distance from the ridge are 1 million years old, and the distance is 100 km, the spreading rate would be 10 cm/year.


Does sea floor spreading happen in a convergent boundary?

No, sea floor spreading does not happen in a convergent boundary. Sea floor spreading occurs at divergent boundaries, where tectonic plates move away from each other, allowing magma to rise and create new oceanic crust. Convergent boundaries involve tectonic plates colliding, leading to subduction or mountain building.