The Alberta Complex is the most prominent member of a mafic to ultramafic igneous suite within the Rehoboth Basement Inlier/Namibia, being intrusive into sediments and mafic volcanics of the Paleoproterozoic Elim Formations. Subsequent amphibolite grade metamorphism of pre-Kibaran age obscured the original mineral assemblage. Two main units have been distinguished in the past within the Alberta Complex. (1) A thick pile of various amphibolites represents original norite, hyperite, gabbro and anorthosite and constitutes the Layered Sequence. It has been subdivided into four zones, thought to represent individual magmatic pulses. (2) Later stage magmatism comprises pegmatite veins as well as pyroxenite, harzburgite and dunite, emplaced in plugs and a cone sheet.