A Reassessment of the Southern Ocean Biochronology by Anthony T. S. Ramsay

By Anthony T. S. Ramsay

The built-in method utilized within the examine presents a reassessment of the stratigraphy formerly proven for the 18 holes which have been re-examined. The authors set out the present knowing of Southern Ocean biochronology and provides a synthesis of biostratigraphical and polarity info from past paintings. the quantity may be a helpful reference for studying the palaeoceanography, climatic heritage and tectonic evolution of the Southern Ocean. It additionally offers a framework for courting oceanography and sedimentary occasions which are used as proxies for examining the glacial background of Antarctica. Paperback additionally to be had: monetary and Palaeoceanographic value of Contourite Deposits - detailed e-book no 276 - ISBN 1862392269 the applying of Ichnology to Palaeoenvironmental And Stratigraphic research (Geological Society certain ebook) - ISBN 1862391548 The Geological Society of LondonFounded in 1807, the Geological Society of London is the oldest geological society on the earth, and one of many greatest publishers within the Earth sciences.The Society publishes a variety of high quality peer-reviewed titles for lecturers and pros operating within the geosciences, and enjoys an enviable foreign attractiveness for the standard of its work.The many parts during which we put up in include:-Petroleum geology-Tectonics, structural geology and geodynamics-Stratigraphy, sedimentology and paleontology-Volcanology, magmatic reports and geochemistry-Remote sensing-History of geology-Regional geology courses

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Additional resources for A Reassessment of the Southern Ocean Biochronology (Geological Society Memoir 18)

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29 ? C2An. igidaria Nitzschia reinholdii Thalassiosira lentiginosa 73-75 70-72 72-74 72-74 C2An. 3n C3n. ln Nitzschia interJi'igidaria Data sets are integrated from the work of numerous authors (see Table 2). ~.. ~ ~ . ~ ~. , , ~ ~ ~ ~ ' ~ ~ ~:~ ruhnes ~ramillo )lduvai j. '1" l[ 50JaUSS 100- a. Gilbert l Fig. 7. Comparison of the D S D P Hole 514 polarity chronozones and diatom zonal assignments by previous workers with the chronozonal assignments of this study. The stratigraphical ranges of selected species are based on the original data sets (see text for references).

9 ? 70 ? 98 ? 23 ? 23 ? 03 ? 29 ? 95 ? 61 H O L E 690B 35 Table 10. 89 ? 58 9 9, 9 9 9 ? 9 ? 9 9 ,) 9 9 ? 97 ? 97 ? 48 9 9 9 ? 36 ? ln Rocella gelida Rocella vigilans 7H-3, 114-115 7H-3, 114-115 7H-4, 27-29 7H-4, 27-29 7H-6, 27-29 7H-6, 114-115 9H-2, 28-30 9H-3, 28-30 C8n. 2n C12n Cyclicargolithus abisectus 9H-6, 28-30 9H-7, 28-30 C12n Reticulofenestra umbilica Isthmolithus recurvus 10H-4, 26-28 11H-l, 29-31 10H-5, 26-28 11H-l, 130-132 11H-3, 29-31 11H-3, 29-31 11H-3, 130-132 11H-3. ln Data sets are integrated from the work of numerous authors (see Table 2).

1 O0 Fig. 8. A revised age-depth plot for D S D P Hole 514 using the biostratigraphical and polarity reversal events identified in this study and calibrated to the GPTS of Cande & Kent (1995). See Fig. 5 for legend of symbols. 3 mbsf representing a recovery of 77% of the cored interval. Sediments recovered consist of Quaternary to upper Miocene diatom ooze, Miocene to Palaeocene calcareous ooze with a variable siliceous component, and Upper Cretaceous chalk. A good palaeomagnetic polarity reversal record was obtained by both shipboard and shorebase analysis (Barker et al.

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