South Atlantic paleobathymetry since early Cretaceous

We present early Cretaceous to present paleobathymetric reconstructions and quantitative uncertainty estimates for the South Atlantic, offering a strong basis for studies of paleocirculation, paleoclimate and paleobiogeography. Circulation in an initially salty and anoxic ocean, restricted by the topography of the Falkland Plateau, Rio Grande Ridge and Walvis Rise, favoured deposition of thick evaporites in shallow water of the Brazilian-Angolan margins. This ceased as sea oor spreading propagated northwards, opening an equatorial gateway to shallow and intermediate circulation. This gateway, together with subsiding volcano-tectonic barriers would have played a key role in Late Cretaceous climate changes. Later deepening and widening of the South Atlantic, together with gateway opening at Drake Passage would lead, by mid-Miocene (∼15 Ma) to the establishment of modern-style thermohaline circulation

Sedimentary waves on the Namibian continental margin and in the Argentine Basin - Bottom flow reconstructions based on high resolution echosounder data.

During several cruises of the German Special Research Project 261 - The South Atlantic in the late Quaternary - to the South Atlantic Ocean, high resolution narrow beam echosounder data revealed sinusoidal structures in deep sea sediments, which showed a conspicuous spatial regularity over large areas in conjunction with pronounced internal layering. They were observed both in the Southeastern and in the Southwestern Atlantic Ocean, and specifically investigated in this study on the Namibian continental margin as weIl as in the central Argentine Basin.18

Report and preliminary results of METEOR cruise M 34/2 Walvis Bay - Walvis Bay, 29.01.1996 - 18.02.1996

SIGLEAvailable from TIB Hannover: RO 7630(78) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Report and preliminary results of METEOR Cruise M 41/1, Malaga - Libreville, 13.2. - 15.3.1998 With partial results of METEOR Cruise 41.2, Libreville - Vitoria, 18.03.1998-15.04.1998

Available from TIB Hannover: RO 7630(114) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman