For 10 points, name this layer of the Earth between the core and the crust.
Entering this region is the ultimate goal of the Chikyu Hakken (CHEE-kew HAWK-ken) project. The lowermost section of this region is known as the D double-prime layer. Its upper boundary is a discontinuity commonly known as the Moho. Its upper section contains the asthenosphere and shares the lithosphere with the region above it. For 10 points, name this layer of the Earth between the core and the crust.
Entering this region is the ultimate goal of the Chikyu Hakken (CHEE-kew HAWK-ken) project.
{mantle}