Reconstruction of oceanic currents and climate change in the Transkei Basin, South African gateway Dissertationzur Erlangung des Doktorgrades der Naturwissenschaften im Fachbereich Geowissenschaften der Universität Bremen vonPhilip Schlüter Bremerhaven, 22. August 2007 Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven Contents1 Introduction ………………………………………………………………12 Background and Methods ………………………………………….……42.1 Geological and oceanographic overview 4 2.2 Thermohaline Circulations 5 2.3 Contourite Drifts 6 2.4 Seismic reflection data 9 2.4.1 General seismic arrangement and equipment 9 2.4.2 Multichannel seismic data processing 10 2.4.3 Seismic data interpretation 103 References ………………………………………………………..…….114 Seismostratigraphic analysis of the Transkei Basin: …………. ………14A history of deep sea current controlled sedimentation by Schlüter, P., Uenzelmann-Neben, G.published in Marine Geology (2007) 4.1 Abstract 14 4.2Introduction 15 4.3 Data acquisition 16 4.4 Seismostratigraphic concept 17 4.4.1Seismic Basement 19 4.4.2Unit 1 19 4.4.32 21 4.4.43 24 4.4.5Unit 4 4.4.