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Approximately 150 kilometers below the Earth's surface lies the upper mantle, a layer of the Earth's interior situated beneath the crust. This region is characterized by solid rock that can flow slowly over geological time, contributing to tectonic activity. The temperature and pressure increase significantly at this depth, influencing the physical and chemical properties of the rocks. The upper mantle plays a critical role in processes like plate tectonics and volcanic activity.

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1mo ago

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