Geography, asked by guddu16740, 7 months ago

why is that upper layer of the mantle known as the asthenosphere? ​

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Answered by studdybuddy
3

Answer:

The upper mantle is called asthenosphere, “astheno” is a Greek word meaning 'weak'. It is called weak layer because it is in liquid state where rock material deforms more readily, and magma formation takes place.

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