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Answer:
Seafloor Spreading: Creating New Ocean Floor
Seafloor spreading is a geological process where new oceanic crust is formed through volcanic activity at mid-ocean ridges. This new crust then gradually moves away from the ridge.
How it works:
* Divergent Plate Boundaries: At mid-ocean ridges, tectonic plates are moving apart from each other.
* Magma Upwelling: As the plates separate, magma (molten rock) rises from the Earth's mantle to fill the gap.
* New Crust Formation: The magma cools and solidifies, creating new oceanic crust.
* Continuous Spreading: The newly formed crust is pushed away from the ridge as more magma rises, resulting in a continuous process of seafloor spreading.
Importance of Seafloor Spreading:
* Plate Tectonics: It's a fundamental process in the theory of plate tectonics, explaining the movement of continents.
* Ocean Basin Formation: Over millions of years, seafloor spreading creates new ocean basins.
* Magnetic Stripes: The process leaves behind magnetic patterns in the rock, providing evidence for the theory.
Would you like to know more about the evidence for seafloor spreading or its connection to other geological processes?