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The crust and upper mantle are called the?
The crust and the upper mantle are a geological part of the earth called the lithosphere. There are 2 parts of the lithosphere: the oceanic lithosphere, which is made up of land underneath water, and the continental lithosphere, which is the the part made of just land. The lithosphere lies on top of the asthenosphere. The lithosphere is made up of tectonic plates, which are pieces of land floating on the lithosphere.
Is the lithosphere hot?
The lithosphere is extremely hot. The temperature of the lithosphere can reach around 600 degrees Celsius. Although this is the case in a general sense, some scientists argue that temperatures can reach up to 1200 degrees Celsius within the lithosphere.
Does continental lithosphere contain more mafic rocks than oceanic lithosphere?
No, oceanic lithosphere contains more mafic rocks compared to continental lithosphere. Oceanic lithosphere is mainly composed of basalt, which is a mafic rock, whereas continental lithosphere is composed of a variety of rock types, including granitic rocks which are more felsic in composition.
Why is oceanic lithosphere subducted while continental lithosphere is not?
The density of the continental (granitic) lithosphere is lower than oceanic (basaltic) lithosphere. Consequently, due to buoyancy, the continental crust rides above the oceanic lithosphere and thus is not subducted. However, it is thought that pieces of the continental lithosphere break off and are subducted along with the oceanic lithosphere.
How did the Joplin tornado effect the lithosphere?
The Joplin tornado did not directly affect the lithosphere, which refers to the rigid outer layer of the Earth's surface. However, the tornado's impact on the infrastructure and land surface above the lithosphere would have indirectly influenced the lithosphere through changes in land use and surface features.
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