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This video lesson will help you understand concepts about the differences between oceanic crust and continental crust.
Earth & Environmental Science introduction to oceanic and continental crust. This video answers the following questions:What is oceanic crust?What is contine...
Oceanic Crust. Geology, formation, mid oceanic ridges, plate tectonics, exploration.Video about Plate Tectonics: https://youtu.be/Mocf0MTNMEAVideo about The...
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.
Composition. Oceanic crust is dominated by mafic and ultramafic intrusive igneous rocks whereas continental rocks are dominated by granitic (felsic) intrusive igneous rocks. The mantle, oceanic crust, and continental crust all have different compositions due to a process called partial melting.
The Earth’s crust is broken up into a series of massive sections called plates. These tectonic plates rest upon the convecting mantle, which causes them to move. The movements of these plates can account for noticeable geologic events such as earthquakes, volcanic eruptions, and more subtle yet sublime events, like the building of mountains.
The process of super-continent formation and destruction via repeated cycles of creation and destruction of oceanic crust is known as the Wilson Cycle. The oldest large-scale oceanic crust is in the west Pacific and north-west Atlantic — both are about up to 180-200 million years old.
