Asthenosphere in a sentence as a noun

The molten layer is located about 100 miles from the surface and is part of the asthenosphere, which is important for plate tectonics because it forms a relatively soft boundary that lets tectonic plates move through the mantle. The researchers found, however that the melt does not appear to notably influence the flow of mantle rocks.

Asthenosphere definitions

noun

the lower layer of the crust