AbstractThe two main erosion surfaces of southern Uganda were both developed in relation to a westward flowing drainage system. In addition they were both distorted, though to a lesser degree in the case of the lower surface, by warping on the flank of the Western Rift Valley. Both of the surfaces are composed of a limited number of minor surfaces whose form is described. Because of the warping, correlation between residuals of these surfaces cannot be undertaken on the basis of absolute heights but has to depend on an analysis of surface form, surface materials, and local morphological relationships. Variations in the nature of the surfaces are examined, and their relationship to lateritic material is discussed. Correlations between the two major surfaces and those found in adjacent areas, together with an examination of their nature in southern Uganda, suggests that the highest surface is of pre-Tertiary age and that the lowest surface was developed between the pre-Miocene and the early Pleistocene.