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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.
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.
Tectonic Tessellation Playground. Instructions: Set one of the two positions (A or B) to adjust. These points are the beginning and end position for the animation. Each land mass can be adjusted by modifying their x, y, and z axis rotation (this can be tedious). You may drag the earth to see different views.
28 Απρ 2020 · Students will learn how seafloor spreading happens, how drill samples provided evidence of spreading, and the lines of evidence that support plate tectonics theory. The lesson involves engaging students with an animation and video on seafloor spreading, think-pair-share discussions, and an activity using a seafloor spreading model.
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.
7 Ιαν 2010 · Plate tectonics. All-in-one diagram. Key consequences of plate motion. Supercontinents and the Wilson cycle. Map of the plates. Modern shape of the Earth's surface. Past shapes - Pangaea, Gondwanaland and Tethys. Chnages in the Earth's surface over time. Geologic time chart.
In this video an introduction to seafloor spreading, subduction and megathrust earthquakes are animated to allow for easier understanding of the topics.
