Unconsolidated material overlying rocks is known as

Unconsolidated material overlying rocks is known as Regolith. Unconsolidated material is a sediment that is loosely arranged or unsatisfied, or whose particles are not cemented together, found either at the surface or depth.
It is a layer of broken soil material that forms the surface of the land and covers the bedrock nearly everywhere. Regolith is inorganic and lies like a blanket over unfragmented rock.