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How does the lithosphere differ from the asthenophere in terms of texture?
The lithosphere is rigid and brittle, composed of the crust and upper portion of the mantle. In contrast, the asthenosphere is more ductile and deformable due to higher temperatures and pressure, allowing it to flow slowly over time. This difference in texture is a result of varying compositions and physical properties of the two layers.
How do the asthenophere and the lithosphere interact?
The asthenosphere is a semi-fluid layer beneath the lithosphere. It allows the lithosphere to move and drift over it, which is known as plate tectonics. The movement of the lithosphere on the asthenosphere is responsible for various geologic processes such as earthquakes and volcanoes.
What are facts about the earths asthenosphere?
The asthenosphere is a semi-fluid layer of the Earth's mantle located beneath the lithosphere. It is responsible for plate tectonics and the movement of tectonic plates. The asthenosphere is composed of hot, solid rock that can flow slowly over long periods of time.
How do you make the lithosphere?
The lithosphere is a part of the Earth's outer shell that includes the crust and uppermost part of the mantle. It is formed by the cooling and solidification of magma from Earth's interior.Plate tectonics play a key role in shaping the lithosphere through processes like volcanic activity, subduction, and spreading of tectonic plates.
Is magma molten rock formed in the asthenophere?
Yes, magma is indeed molten rock formed in the asthenosphere, which is a layer of the Earth's mantle. Due to the high temperature and pressure in the asthenosphere, rocks can partially melt to form magma. This magma can then rise through the Earth's crust and eventually reach the surface as lava during volcanic eruptions.
How thick is the asthenophere?
The asthenosphere (or low-velocity zone) is believed to be about 200 kilometers (120 miles) thick. The layers of rock that make up the asthenosphere are thought to be partially melted and hotter than those in the lithosphere. If this were true, it would explain why the asthenosphere might also have less surface integrity, making it a possible source for the generation of new magma.
Why don't continents go down subduction zones?
Continents are made of continental lithosphere. Continents are composed of rocks that are more buoyant their than denser oceanic counterparts. These lighter rocks float on top of the asthenosphere, which is denser. This balance is maintained due to the fact that lighter substances will raise and rest on heavier substances, such as the asthenophere
Describe continental drift theory?
continents move about as plates of crust and upper mantle, on more mobile layer of asthenophere in the mantle. Movement driven by mantle convection and isostasy. Bumps between continents = mountain chains bump continental with oceanic = island arc vocanoes and subduction of oceanic plate
