Near this body's lower boundary is the D-double prime layer.  
Near this body's lower boundary is the D-double prime layer.  Rocks found in this layer are typically peridotite and olivine, and magnesium silicates and oxides are common here.  The Gutenberg discontinuity separates this layer from the one below it, while the Mohorovicic discontinuity separates this layer from the one above it.  This layer includes the lower part of the lithosphere as well as the asthenosphere, and it undergoes convection.  For 10 points, name this layer of the Earth, which lies between the crust and the core.
Near this body's lower boundary is the D-double prime layer.  
mantle