A study on the Bellingwe Greenstone Belt, presenting the stratigraphy of the belt, its structure and tectonic setting, the sedimentology of what may be a rift basin, the geochemistry of the freshest Archaean komatiites yet found, and models of the evolution of the region.Contents: Stratigraphy of the Belingwe Greenstone Belt: Complexity of the tectonic setting; Structure and metamorphism of the Belingwe Greenstone Belt and adjacent granite-gneiss terrain: The tectonic evolution of an Archaean craton; The Mtchinge Group in the West: Andesite, basalts, komatiites and sediments of the Ilokonui, Bend and Koodoovale Formations; Sedimentology of the Brooklands Formation, Zimbabwe: Development of an Archaean greenstone belt in a rapidly rifted graben;