From Simple English Wikipedia, the free encyclopedia
Earth
cutaway
The
asthenosphere
is part of
earth
's
mantle
. It is about 100 km to 350 km under the surface.
[1]
It is the lower part of the upper mantle, and behaves as a hot
viscous
liquid.
It consists of hot, weak material that can be deformed like
silly putty
. That means it is capable of gradual
flow
. It is under the
lithosphere
.