9781843302407 | Willie Olivier, Sandra Olivier

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Africa. These pyroclastic deposits preserve the earliest evidence of volcanism in Karoo. ... corrected for water-rock in
Namibia | 128 pages | New Holland, 2004 | 2004 | 9781843302407 | Willie Olivier, Sandra Olivier Calcified metazoans in thrombolite-stromatolite reefs of the terminal Proterozoic Nama Group, Namibia, reefs containing abundant calcified metazoans occur at several stratigraphic levels within carbonate platforms of the terminal Proterozoic Nama Group, central and southern Namibia. The reef-bearing strata span an interval ranging from approximately. U-Pb zircon date from the Neoproterozoic Ghaub Formation, Namibia: constraints on Marinoan glaciation, dropstone-bearing glaciomarine sedimentary rocks of the Ghaub Formation within metamorphosed Neoproterozoic basinal strata (Swakop Group) in central Namibia contain interbedded mafic lava flows and thin felsic ash beds. U-Pb zircon geochronology. Living with the modern conservation paradigm: can agricultural communities co-exist with elephants? A five-year case study in East Caprivi, Namibia, the economic impact of elephants, Loxodonta africana, and predators, particularly lions, Panthera leo, on rural agriculturists in the Kwando region of the East Caprivi, Namibia was assessed from the years 1991 to 1995. Elephants were responsible for the greatest number. The geochronology and significance of ash-fall tuffs in the glaciogenic Carboniferous-Permian Dwyka Group of Namibia and South Africa, centimetre thick, laterally extensive tuff horizons occur within dark, marine mudstones of the Carboniferous-Permian Dwyka Group (Karoo Supergroup) in southern Namibia and South Africa. These pyroclastic deposits preserve the earliest evidence of volcanism in Karoo. Isotopic compositions of carbonates and organic carbon from upper Proterozoic successions in Namibia: stratigraphic variation and the effects of diagenesis and, the carbon isotope geochemistry of carbonates and organic carbon in the late Proterozoic Damara Supergroup of Namibia, including the Nama, Witvlei, and Gariep groups on the Kalahari Craton and the Mulden and Otavi groups on the Congo Craton, has been. HIV prevalence, risks for HIV infection, and human rights among men who have sex with men (MSM) in Malawi, Namibia, and Botswana, background In the generalized epidemics of HIV in southern Sub-Saharan Africa, men who have sex with men have been largely excluded from HIV surveillance and research. Epidemiologic data for MSM in southern Africa are among the sparsest globally, and HIV risk. Psychological success factors of small scale businesses in Namibia: The roles of strategy process, entrepreneurial orientation and the environment, it is hypothesized that psychological strategy process characteristics, such as complete planning, critical point planning, opportunistic, and reactive, as well as entrepreneurial orientation (autonomy, innovativeness, competitive aggressiveness, and risk taking. Deep structure of the Namibia continental margin as derived from integrated geophysical studies, abstract During the Geophysical Measurements Across the Continental Margin of Namibia (MAMBA) experiments, offshore and onshore refraction and reflection seismic as well as magnetic data were collected. Together with the existing free-air gravity data, these were. A composite reference section for terminal Proterozoic strata of southern Namibia, integrated sequence stratigraphic and chemostratigraphic data yield a framework for correlations of stratigraphic units in the terminal Proterozoic to Cambrian Witvlei and Nama Groups of Namibia. Coupled with precise U-Pb zircon age constraints, these correlations. Glacial temperatures and moisture transport regimes reconstructed from noble gases and δ18O, Stampriet aquifer, Namibia, a noble gas temperature and δ 18 O record covering the past 30,000 years has been obtained from the Stampriet artesian aquifer in southeastern Namibia (24 deg. S, 19.5 deg. E). Radiocarbon ages, corrected for water-rock interactions along the flow path, increase. Soil ciliates (Protozoa, Ciliophora) from Namibia (Southwest Africa), with emphasis on two contrasting environments, the Etosha region and the Namib Desert, a highly diverse ciliate community was found in 73 samples from terrestrial and semiterrestrial habitats of Namibia, Southwest Africa, one of the world's driest countries. The ciliate, respectively, their resting cysts, were re-activated from air-dried samples using. Deep sulfate reduction completely mediated by anaerobic methane oxidation in sediments of the upwelling area off Namibia, porewater concentrations of sulfate, methane, and other relevant constituents were determined on four sediment cores from the high productivity upwelling area off Namibia which were recovered from the continental slope at water depths of 1300 and 2000. The Pan-African Damara Orogen of South West Africa/Namibia, the structural grain of the Damara orogen points to a reversal of spreading and to north-westward subduction of the African cratons below a South American craton and of the Kalahari Craton below the Congo Craton. D 1 recumbent folding was followed by intrusion. Late Miocene origin of the Benguela upswelling system off northern Namibia, deep Sea Drilling Project cores collected at site 362/362A suggest the time of initiation of the Benguela upwelling system off northern Namibia. Studies of sediment accumulation rates, diatom abundances, microfossil temperature preferences (for planktic foraminifers. Fossil homo femur from Berg Aukas, northern Namibia, the proximal half of a hominid femur was recovered from deep within a paleokarst feature at the Berg Aukas mine, northern Namibia. The femur is fully mineralized, but it is not possible to place it in geochrono logical context. It has a very large head, an exceptionally thick. Precise U-Pb zircon ages for early Damaran magmatism in the Summas Mountains and Welwitschia Inlier, northern Damara belt, Namibia, igneous rocks related to Neoproterozoic continental rifting occur sporadically for 400 km along the northern margin of the Damara belt in northern Namibia (Fig. 1)(Miller, 1983). Alkaline and peralkaline rhyolite ash-flow tuffs predominate, but other felsic extrusive rocks. State, society and Democracy, the Three Key Concepts.................................................................................. 2 State............................................................................................................... 2 Society.......................................................................................................... 4 Democracy. A major perturbation of the carbon cycle before the Ghaub glaciation (Neoproterozoic) in Namibia: Prelude to snowball Earth, a large (11-15⠰) negative shift in δ 13 C is observed in shallow water carbonates directly beneath Neoproterozoic glacial deposits (or correlative disconformity) in northwest Namibia ascribed to a snowball Earth. Reproducibility and stratigraphic concordance of this anomaly. Ephemeral rivers and their catchments: sustaining people and development in western Namibia, a publication on Namibia's westward flowing ephemeral rivers and their catchments, the poeople living in this region and how they are currently using them. Demographics of the catchments, their natural resources, managing especially of vegetation and water resources. Biological diversity in Namibia: a clash of sea and land, fog and dust, namibia is a dramatic country, not least because of its scenic juxtaposition of forbidding desert and cold marine currents, of vast gravel plains and bold inselbergs, and of tropical wetlands and waterless Kalahari woodlands. As a mainly arid land famed for its two deserts.