Basement Complex - OnlineNigeriaFeb 20, 2004 . Basement complex rocks are subdivided into migmatite-gneiss . gneiss complex is the common- est rock type in the Nigerian Basement complex. . caused by the parallel arrangement of alternating dark and light minerals.concept of minerals and rocks in nigeria,concept of minerals and rocks in nigeria,Rock Types - OnlineNigeriaFeb 20, 2004 . The three major rock types - igneous, meta- morphic and sedimentary . the sedimentary basins are equally dispersed in Nigeria, with base- ment most . and talc are among the mineral deposits in the Basement Complex.
concept of minerals and rocks in nigeria