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

By Anthony T. S. Ramsay

The built-in technique utilized within the research offers a reassessment of the stratigraphy formerly confirmed for the 18 holes which were re-examined. The authors set out the present knowing of Southern Ocean biochronology and provides a synthesis of biostratigraphical and polarity facts from past paintings. the amount could be a priceless reference for analyzing the palaeoceanography, climatic background and tectonic evolution of the Southern Ocean. It additionally presents a framework for relationship oceanography and sedimentary occasions which are used as proxies for reading the glacial historical past of Antarctica. Paperback

Also available:

monetary and Palaeoceanographic value of Contourite Deposits - specified e-book no 276 - ISBN 1862392269
the appliance of Ichnology to Palaeoenvironmental And Stratigraphic research (Geological Society precise ebook) - ISBN 1862391548

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A Reassessment of the Southern Ocean Biochronology (Geological Society Special Memoir, 18)

The built-in process utilized within the examine offers a reassessment of the stratigraphy formerly validated for the 18 holes which have been re-examined. The authors set out the present realizing of Southern Ocean biochronology and provides a synthesis of biostratigraphical and polarity facts from past paintings.

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Extra resources for A Reassessment of the Southern Ocean Biochronology (Geological Society Special Memoir, 18)

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100 -__ 120 I 140 I I I I I I I I I I I I I i i I I I I I I I ~ 689B Magnetostratigraphy Depth mbsf SpieB Spie8 (1990) 11990) his ~ ~ ~ . ~ ~ ~ ~-. ~ ~ . ~ , ~ ~. ~ ~ ~ 9 ~: ~ ~ ~ ~ - . - - ~ ~ . . ~ ~ ~. ~- ~ ~ :~ .. ~ . m~n ~ . ~ ~ :~ ~ ' ~ I I i i ~ ~ ! 19! . 4 ~z~'! ~ ~-~-'~'~ ~ T. it~siena Fig. 10. Comparison of the ODP Hole 689B polarity chronozones and diatom zonal assignments by previous workers with the chronozonal assignments of this study. The stratigraphical ranges of selected stratigraphical indicators are based on the original data sets (see text for references).

MaccollumnH l _L a. a. ~2~erm~ I I Oligocene Cl0N-1 ? - ~ - . C I O t l n Cl~2n C1 IN-2- , C1 lnln C12N -C12n CI3N-I/2 C15N-1/2 C15N-1/2 _. C 13n C15n C16nln C]fia2n I -- T m 30 HOLE 689B Table 9. Composite dataset for ODP Hole 689B containing the diatom, radiolarian, calcareous nannofossil and palaeomagnetic data calibrated to the GPTS of Cande & Kent (1995) using the biochronological interpretation based on this stud)' Event Sample (top) Sample (bottom) Depth (t) Depth (b) Age (t) Age (b) 1H-l, 0 1H- 1, 0 1H- 1, 1H- 1, 1H-1 1H-1 1H-1 1H- 1.

A A ] 40 I I I I I I I I I ! 1 I I I I I I A I Table 6. ln C2n Simonseniella barboi Thalassiosira kolbei C2n C2r. 47 (continued I t 24 H O L E 514 Table 6. 29 ? 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.

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