Savanna.

Abstract

Past environments have left a legacy of relict deep weathering and duricrusts, stripped bare-rock surfaces, and accumulations of alluvial, colluvial and aeolian sediments. The former attain depths exceeding 30m and duricrusted ferricretes occur as mesa forms, while the latter form a mantle up to 20m thick containing debris fans, mudflows, sheetwash deposits and dune sands, many dating from phases of Late Pleistocene aridity. Steep hillslopes and low-angled piedmont slopes are commonly juxtaposed; the latter may be thinly veneered or thickly mantled by residual or transported sediments. These non-cohesive superficial deposits are subject to rapid removal by sheet and gully erosion when exposed to heavy rain. -from Author