asthenosphere astenosfera
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| Language pair: | inglés al español |
| Definition / notes: | The asthenosphere (from Greek asthen?s 'weak' + sphere) is the highly viscous, mechanically weak and ductilely-deforming region of the upper mantle of the Earth. It lies below the lithosphere, at depths between 100 and 200 km (~ 62 and 124 miles) below the surface, but perhaps extending as deep as 700 km (~ 435 miles). |
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