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Explain the significance of the fact that the lithosphere is primarily composed of basalt while the crust is composed primarily of granite?
Wiki User
∙ 14y ago
The lithosphere is composed of the oceanic and continental crust, along with the brittle uppermost mantle. The continental crust is mainly granitic, and the oceanic crust is primarily basalt.
Wiki User
∙ 14y ago
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Explain the differences between the crust and the lithosphere?
The Litosphere is the outermost,rigid layer of the Earth and the Crust is the outermost layer of the Earth
What is below the lithosphere and how does this help to explain the theory of plate tectonics?
The lithosphere of the Earth is composed of the crust and the upper part of the upper mantle, and is broken up into plates. Below the lithosphere is the asthenosphere, which is the lower part of the upper mantle and the entire lower mantle. The asthenosphere is a plastic-like substance that flows due to convection. As this substance flows, it causes the plates above it to move around. Plate tectonics is the theory that the lithosphere is divided into plates that are constantly in motion.
Explain why the crust and solid upper mantle are termed the lithosphere?
There are two primary concepts which geologists / geophysicists use to separate the earth into layers.One where the earth is separated; based on varying chemical composition; into the following broad layers: the crust (composed primarily of alumino-silicates), the mantle (predominantly ferro-magnesium silicates) and the outer and inner core (composed of nickel-iron alloy, and iron respectively).And the second method which is based on the mechanical properties of the Earth. The outer layer in this system is known as the lithosphere and is that portion of the Earth (crust and solid upper mantle) that yields to stress as a brittle solid, unlike the underlying asthenosphere which yields in a ductile manner.
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Explain how the additional of fluids to hot rock causes magma to form?
The lithosphere primarily comprises of volcanic rocks and sediments that contain fluids and water. These fluids contact the rocks surrounding as the lithosphere moves into the mantle in the downward direction. The rock's melting temperature decreases when the fluid begins the enter the hot rock. This melts it to form magma.
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