REGIONAL SETTING

Sites 1075, 1076, and 1077 were drilled in the Lower Congo Basin to sample a complex depositional system dominated by riverine input, seasonal coastal upwelling, and excursions from the South Equatorial Countercurrent (see "Introduction" chapter, this volume). Sites 1078, 1079, and 1080 were drilled off Angola near 12°S to provide information on normal hemipelagic sedimentation, which is influenced neither by riverine input nor any sustained year-round upwelling. Sites 1081, 1082, 1083, and 1084, together with Deep Sea Drilling Project (DSDP) Sites 532 and 362 (Legs 75 and 40), were drilled to form a transect that is central to reconstructing the upwelling history of the Benguela Current. The transect begins in the north, on the Walvis Ridge, and extends to the south, within the Walvis Basin, where organic-rich sediments associated with intense upwelling dominate. Sites 1085, 1086, and 1087 were drilled to explore the early history of the Benguela Current and to detect the possible influence of the Agulhas Current. The sites are located close to the continent to detect upwelling and continental climatic signals.

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