|
|
|
|
|
| Blivi, A.B.; Anthony, E.J.; Oyédé, L.M.. |
| The morphology, sedimentary facies, stratigraphy and development history of re-entrants and sand barriers in Togo and Benin (West Africa) have been analysed from boreholes and field data, and available radiocarbon dates. Re-entrant deposits range from basal Late Pleistocene fluviatile sands into Holocene estuarine and fluvio-deltaic sands. As sea level stabilized between 6000 and 5500 B.P., the "compartmented" coast associated with these reentrants favoured a polycellular longshore drift system. As the latter became infilled throughout the bight of Benin between 6000 and 4000 B.P., the littoral drift system evolved into a unicellular system fed by the Volta delta in Ghana, which has been the major sand source for an almost 300 kin long outer harrier. In... |
| Tipo: Journal Contribution |
Palavras-chave: Sand banks. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/1459 |
| |
|
|
| Anthony, E.J.; Blivi, A.B.. |
| The coast of eastern Ghana and Togo is bounded by a major Holcene sand barrier complex hinged on the Volta Delta to the west and subject to high rates of longshore sand drift (1-1.5 x 10 m³/yr). In spite of its proximity to this major detaic sediment source, this barrier system shows marked longshore variations in progadation following the middle Holocene eustatic sillstand. It is a 'hybrid' system in terms of internal facies composition and plan-view morphology, in that it has evolved from an essentially regressive to a stationary (synonymous with cessation of progradation) system. Both transgressive and barrier-inlet facies have also developed through time and space. These temporal and spatial changes in patterns of development reflect variations in... |
| Tipo: Journal Contribution |
|
| Ano: 1999 |
URL: http://hdl.handle.net/1834/2509 |
| |
|
|
|
