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29 Νοε 2023 · Seafloor spreading is a geologic process in which tectonic plates —large slabs of Earth's lithosphere —split apart from each other. Seafloor spreading and other tectonic activity processes are the result of mantle convection. Mantle convection is the slow, churning motion of Earth’s mantle.
- National Geographic Society
The theory of plate tectonics states that Earth’s solid...
- National Geographic Society
Seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. This idea played a pivotal role in the development of the theory of plate tectonics, which revolutionized geologic thought during the last quarter of the 20th century..
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Rift valleys provide insight into the processes of seafloor spreading, the characteristics of plate boundaries, and the mechanisms driving plate motion, as they exemplify how tectonic activity shapes the Earth's surface.
26 Απρ 2024 · The theory of plate tectonics states that Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
28 Απρ 2020 · This science lesson plan aims to teach 10th grade students about seafloor spreading through various classroom activities. Students will learn how seafloor spreading happens, how drill samples provided evidence of spreading, and the lines of evidence that support plate tectonics theory.
Seafloor spreading determines plate motion around a midocean ridge. Midocean ridges are always plate boundaries. Since many plates, such as the North American Plate, include continental portions attached to oceanic portions, seafloor spreading also the direction in which continents move.
