Respuesta :
A. Moho barrierĀ Ā TheĀ MohoĀ is the boundary between the crust and the mantle in the earth.
B. Oceanic crustĀ
is the uppermost layer of the oceanic portion of aĀ tectonic plate. The crust overlies the solidified and uppermost layer of theĀ mantle. The crust and the solid mantle layer together constitute oceanicĀ
Lower mantleĀ
A large fraction of Earth's interior, from a depth of about 650 km (400 miles) down to 2,900 km (1,800 miles), consists of theĀ lower mantle, which is composed chiefly of magnesium- and iron-bearing silicates, including the high-pressure equivalents of olivine and pyroxene.
upper mantleĀ
TheĀ upper mantleĀ begins just beneath the crust and ends at the lower mantle.
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