Holocene landscape history and palaeohydrology evidenced by stable carbon isotope (δ C 13)analysis of alluvial sediments in the Mbari valley (5°N/23°E), CentralAfricanRepublic
and in the Mbari valley in the southeast of the CentralAfricanRepublic. Secondly, it focuses on the impact of Quaternary environmental changes on geomorphological processes.
Physiogeographic features of the Oubangui catchment and environmental trends reflected in discharge and floods at Bangui 1911-1999, CentralAfricanRepublic
Africa ; Aridisation ; Central Africa ; Climatic trend ; Discharge ; Flood ; Natural hazards ; Twentieth Century ; Urban area ; Watershed
By using the regional case of the Oubangui River drainage area in Central Africa, the aim of this study is to focus on the intensity and frequency of flood hazards over the past 90 years at the site of Bangui. It will be discussed if the statistical
analysis of the Oubangui discharges from 1911 up to the present will confirm the hypothesis of a recently ongoing aridification trend evidenced by fluvial systems in northern Central Africa.
Sur la base d'un travail d'Y. BOULVERT en République Centrafricaine, l'A. étudie la distribution des termitières-champignons dans 3 pays d'Afrique centrale: Bénin, Cameroun, Zaïre. Il constate leur répartition très contrastée entre la République
Rheological properties of parts of the African lithosphere and their geodynamic significance
Estimates of viscosity range from about 10 Pa s (i. e. 10 poise) under the East African Rift Valley system to 10 Pa s (on 10 poise) below the West African shield in Niger republic and Sierra Leone. High temperatures, low densities, low viscosities
and high stress gradients characterize the East African Rift Valley areas, the Afar triangle, and some of the swells e. g. Tibesti and Jebel Mara. Data from electromagnetic deep soundings, gravity and teleseismic delay time studies are incorporated
to present representative models of the lithosphere for the various tectonic regimes of the African continent.
The formation of national cadres of industrial workers in cattle-breeding districts of Soviet Eastern Republics: the Turkmen Soviet Socialist Republic in The nomadic alternative. Modes and Models of Interaction in the African-Asian deserts
Les savanes d'Afrique centrale entre enclavement et intégration aux marchés
Africa ; Agricultural intensification ; Agriculture ; Central Africa ; CentralAfricanRepublic ; Cotton ; Enclave ; Farming system ; Livestock farming ; Pioneer fringe ; Savanna ; Spatial dynamics ; Spatial organization ; Urbanization
Afrique ; Afrique centrale ; Agriculture ; Cameroun du Nord ; Centrafricaine république ; Coton ; Dynamique spatiale ; Elevage ; Enclavement ; Front pionnier ; Intensification agricole ; Organisation de l'espace ; Savane ; Système de culture ; Tchad
Les plantes à tubercules de la forêt dense d'Afrique centrale
The different species of rain-forest plants developing starchy tubers were studied around Makokou (N. E. Gabon) and in the Lobaye River district (S. W. CentralAfricanRepublic). A detailed description of the tuberous parts is given, particularly
Planation surfaces are well pronounced in the topography of the Republic of Guinea-Bissau. They came into being during the Late Alpine macrocycle of the relief formation. Two planated surfaces belong to the African stage (Late Cretaceous-Oligocene
) and are designated as Early and Late African respectively. Since Miocene a post-African pediplain formation begins which marks the epoch of global pediplanation. The process proceeded along with erosion and alluviation in river valleys. Early Africain surface
remnants persist only in the South-East of the country. The Late African surface is widespread in eastern regions. Post-African pediplain can be found practically all over the country. - (L'A.).
dominated the politics of the Union and the Republic of South Africa. The A. seeks to understand the efforts by the GNU to build a new post-apartheid national identity. The focus is the changing bases on which a South African nationhood is built.
Different approaches have been employed to develop South African national identities. In April 1994, a new chapter was opened for the country to search for a new South Africanism. The paper attempts to give an overview of the nationalisms which