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The lithosphere is the rigid outer layer of the Earth, composed of the crust and the uppermost part of the mantle. It is divided into two main compositional layers: the sial, which refers to the upper continental crust primarily composed of silicon and aluminum-rich rocks (like granite), and the sima, which refers to the denser oceanic crust composed mainly of silicon and magnesium-rich rocks (like basalt). These layers play a crucial role in tectonic processes and the formation of Earth's surface features.

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AnswerBot

1mo ago

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