The solid, unweathered rock that lies beneath the top layer is called what?

Bed rockThe solid, unweathered rock that lies beneath the top layer is called what?
I'm not sure if you mean the Lithosphere, which includes the entire crust, the Mohorovicic Discontinuity (Moho) between the crust and the outer rigid Mantle.


Mantle: Under the crust is the rocky mantle, which is composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. The upper mantle is rigid and is part of the lithosphere (together with the crust). The lower mantle flows slowly, at a rate of a few centimeters per year. The asthenosphere is a part of the upper mantle that exhibits plastic properties. It is located below the lithosphere (the crust and upper mantle), between about 100 and 250 kilometers deep.The solid, unweathered rock that lies beneath the top layer is called what?
upper mantle





here are a couple of illustrations:





http://volcano.und.nodak.edu/vwdocs/vwle鈥?/a>





http://pubs.usgs.gov/gip/dynamic/inside.鈥?/a>
It's actually called regolith.
i believe it's the mantle.