author={Terence S. McCarthy},
  journal={South African Journal of Geology},
  • T. McCarthy
  • Published 1 June 2013
  • Environmental Science, Geology
  • South African Journal of Geology
The Okavango Delta is southern Africa’s largest wetland ecosystem and probably the most pristine large wetland ecosystem in the world. Alex du Toit was the first to recognize the role of faulting in the origin of the Delta, proposing that the Delta lies within a graben structure related to the East African Rift Valley system. The history of its rivers is more ancient, extending back to the breakup of Gondwana. Two mantle plumes initiated the breakup of Gondwana: the 140 Ma Karoo plume and the… 
Significantly enhanced mid Holocene fluvial activity in a globally important, arid‐zone wetland: The Okavango Delta, Botswana
Information on past dryland environments is commonly derived from geomorphological landforms and sediments (‘geoproxies’). The Okavango Delta in the middle Kalahari, Botswana, has been subject to a
Landscape responses to intraplate deformation in the Kalahari constrained by sediment provenance and chronology in the Okavango Basin
The structural depression that occupies the Okavango Basin in southern Africa comprises a depo‐centre within the intracratonic Kalahari Basin where sediments of the Cenozoic Kalahari Group have
The Richtersveld: An Ancient Rocky Wilderness
The Richtersveld , in northwest South Africa, is located at the transition from the coastal plain to the elevated interior plateau and adjacent to the Orange River . Despite this positioning, the
Landscape evolution in Africa during the Cenozoic and Quaternary—the legacy and limitations of Lester C. King
African landscape evolution since 66 Ma reflects interactions among parts of the Earth system from the Core to the Biosphere. We stress changes in those interactions in three events that have
Hydrogeology and geochemistry of a tectonically controlled, deep-seated and semi-fossil aquifer in the Zambezi Region (Namibia)
Recent exploration has revealed that deep-seated and large groundwater reservoirs in Africa’s intracontinental basins can be regarded as an additional strategic resource for supply of drinking water.
Trace Metal Enrichments in Water of the Okavango Delta (Botswana): Hydrological Consequences
The Okavango Delta in northern Botswana is an endorheic ecosystem formed by 150,000 islands surrounded by a flood plain. The vegetation of these islands displays an external tree ring enclosing a
Tectonics and Landscape of the Central African Plateau and their Implications for a Propagating Southwestern Rift in Africa
The Central African Plateau (CAP) covers a million square kilometers of African lithosphere absent of recent volcanism and intense seismicity. Treating the CAP erosion surface as a reference frame


Drainage evolution in south-central Africa since the breakup of Gondwana
The drainage system in south-central Africa has undergone major reorganisations since the disruption of Gondwana. Isopachs of the Kalahari sequence and a variety of geomorphological features can be
The topography of the Okavango Delta, Botswana, and its tectonic and sedimentological implications
A topographic map of the Okavango Delta and environs has been constructed using a combination of elevation data including trigonometric beacons and spot heights from the government of Botswana,
Observations on the hydrology and geohydrology of the Okavango Delta
The Okavango Delta is situated within two major grabens, one containing the Panhandle and the other the Delta itself. The main graben is underlain by between 200 m and 300 m of largely unconsolidated
Post-Gondwana drainage and the development of diamond placers in western South Africa
The post-Gondwana history of the major rivers in the western part of South Africa is important because these rivers were instrumental in the development of diamond placers along the west coast of
Of diamonds, dinosaurs and diastrophism; 150 million years of landscape evolution in southern Africa
The state of knowledge on the tectonic and geomorphological evolution of southern Africa during the post-Gondwana period is reviewed in the context of Alex du Toit9s fundamental contributions to
Landform evolution in the context of climatic change and neo-tectonism in the Middle Kalahari of north-central Botswana.
  • H. Cooke
  • Geography, Environmental Science
  • 1980
The Middle Kalahari of north-central Botswana is dominated by a huge basin of inland drainage partly filled with the geological formation known as the Kalahari beds, of late Tertiary to Recent age
SUMMARY The Okavango Delta is a large, low gradient (ca. 1:3400), alluvial fan situated in a graben structure which is an extension of the East African Rift system. The catchment is situated in
Late Quaternary Landforms and Environmental Change in Northwest Botswana: The Evidence of Lake Ngami and the Mababe Depression
  • P. Shaw
  • Environmental Science, Geography
  • 1985
Lake Ngami and the Mababe Depression contain series of concentric shoreline features controlled by volume: area thresholds in the Okavango Delta region. Of particular interest are the 945 m (Lake