Question

What do geologists call the uppermost mantle?

Answer 1

Answer:

Geologists call the outermost, brittle, mechanical layer the lithosphere. ... The lithosphere is made of the crust plus the uppermost part of the mantle. The asthenosphere is directly under the lithosphere and is part of the upper mantle.

Answer 2

Explanation:

The Earth's Crust, Lithosphere and Asthenosphere

Also, ocean crust is made of denser minerals than continental crust. The tectonic plates are made up of Earth's crust and the upper part of the mantle layer underneath. Together the crust and upper mantle are called the lithosphere and they extend about 80 km deep.