Question

What is the asthenosphere made of?

Answer 1

Rocks in the asthenosphere are "plastic", meaning that they can flow in response to deformation. Even though it can flow, the asthenosphere is still made of solid (not liquid) rock; you can think of it kind of like Silly Putty.

Answer 2

The asthenosphere is made of the crust and the upper layer of the mantle together make up a zone of rigid, brittle rick called lithosphere is a zone of asphalt like consistency called the asthenosphere the asthenosphere is the part of mantle that moves and flows the plates of the earth.