Final answer:
Seafloor spreading is a key piece of evidence for the theory of plate tectonics as it involves the continuous generation and movement of oceanic crust. This process provides evidence for divergent plate boundaries and the lateral movement of tectonic plates. Magnetic striping on the ocean floor further supports seafloor spreading and helped develop the theory of plate tectonics.
Step-by-step explanation:
Seafloor spreading is a key piece of evidence that supports the theory of plate tectonics. During seafloor spreading, molten material rises from the mantle and forms new oceanic crust at mid-ocean ridges. As the molten material spreads out, it pushes the existing crust to the sides, creating a continuous process of crustal generation and movement. This process provides evidence for the existence of divergent plate boundaries and the lateral movement of tectonic plates.
One example of seafloor spreading contributing to the theory of plate tectonics is the discovery of magnetic striping on the ocean floor. Scientists found that the rocks on either side of mid-ocean ridges have different magnetic properties. By studying the orientation of these magnetic stripes, scientists were able to determine that the seafloor was spreading apart. This supported the idea of tectonic plates moving and led to the development of the theory of plate tectonics.
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