Question

what are the two parts of crust and what is the basisof class

Answer 1

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The crust is made up of different types of rocks: igneous, metamorphic, and sedimentary rocks. Below the crust is the mantle. The upper part of the mantle is made up of peridotite, a rock denser than rocks common in thecrust. The crust and the upper mantle make up the lithosphere.
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Answer 2

The crust is divided into two parts-
1- Continental crust- the elevated portion of the crust
2- Oceanic crust
the classification is mainly done on the basis of thickness. Continental crust is 32km thick and elevated while the Oceanic crust is 7km thick and made mainly of Basalt.
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