Advances in Oceanography by X. Le Pichon, M. Melguen, J. C. Sibuet (auth.), Henry

By X. Le Pichon, M. Melguen, J. C. Sibuet (auth.), Henry Charnock, Sir George Deacon (eds.)

The papers on the common Symposia of the Joint Oceanographic meeting have been provided by means of authors who have been invited to accommodate issues of extensive interdisciplinary curiosity. jointly they gave a precious account of the current nation of marine learn, its proQlems and capability. There turns out advantage in publishing them in a single quantity and we're thankful to the authors who kindly agreed to arrange their papers for book. This has taken it slow (and now not all authors chanced on it attainable) yet we are hoping the ensuing quantity remains to be indicative of developments in sleek oceanography. really visible is the best way the utilized elements are starting to play a extra vital half despite concerns concerning the results of the legislation of the ocean on our freedom to make observations. we're specifically thankful to the 4 authors who agreed to offer lectures summarising the paintings of their personal box which was once pronounced on the meeting. We additionally desire to thank the opposite authors, in addition to all concerned about the meeting and with the creation of this volume.

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D. , 1~64 : Sedimentation rates and mineralogy in the south Atlantic - J. Geophys. , v. 69, p. 4293-4309. C. , 1968. Marine magnetic anomalies, geomagnetic field reversals, and motions of the ocean floor and continents. J. Geophys. , 73 : 2119-2136. B. ELDER, 1969: Contour currents in the Weddell Sea. Deep-Sea Research, 16 p. 99-101. E. L. , 1975 Antarctic Bottom Water Transport through the Vema Channel (in press). , 1972 : Australian - Antarctic Continental Drift, Palaeocirculation changes and Oligocene DeepSea Erosion; Science, vol.

THIS WORK • AFTER BERGER ROTH 1975 • AFTER RAMSAY 1974 a Figure 12. CCD fluctuations since Aptian time in the South Atlantic ocean (average values from Argentine and Cape basins). y. MODEL OF THE EVOLUTION OF THE SOUTH ATLANTIC 27 The paleo-CCD curve of figure 12, which tries to give a rough approximation of the general evolution of the CCD in the Argentine and Cape basins, will thus be the basis of our attempt at reconstructing the paleofacies maps. Although this curve will undoubtedly be modified, it will allow us to demonstrate the basic methodology of reconstruction.

For facies symbols see figure 5. 34 x. LE PICHON, M. e. SIBUET marly limestones alternate with the sapropels. , 1975). ) Fig. 17, 18, 19, 20. Figure 18 shows that this is the stage of complete disruption of the different east-west topographic barriers. , fig. 15), there is already a 200 km gap between the well defined marginal fracture zones of the equatorial fracture zones. Similarly, to the south, the long Falkland-Agulhas fracture zone has already been broken and the opening enters into a new stage where it is not constrained any more by this strong Africa-South America coupling (LE PICHON and HAYES, 1971).

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