精选优质文档-倾情为你奉上2. The Outer Part of the Earths Crust Bedrock is the solid rock that is exposed at the surface or immediately underlies soil and loose surface debris. Regolith is relatively thin covering of soil and unconsolidated rock waste that hides the bedrock in most areas. Bedrock is continuous and may consist of any kind of rock, whereas regolith is discontinuous, although generally present. Regolith tends to be a few tens of feet thick or less, but may be much thicker. It may de
