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Bulletin de la Societe Geologique de France; March-April 2009; v. 180; no. 2; p. 117-129; DOI: 10.2113/gssgfbull.180.2.117
© 2009 Societe Geologique de France
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Distribution of Albian clastic deposits in the Benguela basin (Angola): evidence of a Benguela palaeocurrent?

Didier Quesne1, André Buta-Neto2, Dominique Benard1,3 and Michel Guiraud1

1 Université de Bourgogne, UFR des Sciences de la Terre et de l’Environnement, UMR 5561 Biogéosciences, Dijon. France. Didier.Quesne{at}u-bourgogne.fr, Michel.Guiraud{at}u-bourgogne.fr
2 Universidad Agostinho Neto, Luanda, Angola. Andre.Buta{at}u-bourgogne.fr
3 Bénevise, 26 410 Treschenu-Creyers, France

The Albian clastic Tuenza Formation of the Benguela basin (south Angola) is described and its geographic distribution analysed in detail. From these observations, the existence of an Albian "PalaeoBenguela current" is proposed. This would imply that a marine longshore current reworked the sand transported by palaeorivers and settled it northward along the coast of the young Atlantic Ocean (during the Albian). A parallel between Albian clastic deposits and the modern sediments deposited by the Benguela current is drawn, focusing on the striking resemblance between the two currents, i.e. the actual Benguela current and the Albian marine current, and the associated sedimentary bodies.

Key Words: Tuenza Formation • Albian • Kwanza basin • Albian palaeocurrents • Benguela current • Angola






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