Neogene biochronology of Antarctic diatoms: A comparison between two quantitative approaches,CONOP and UAgraph |
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| Authors: | Federico Galster Jean Guex Oyvind Hammer |
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| Institution: | 1. Ruhr-Universität Bochum, Institut für Geologie, Mineralogie und Geophysik, D-44870 Bochum, Germany;2. Geertekerkhof 14bis, 3511 XC Utrecht, The Netherlands;3. Petroleum Geosciences, The Petroleum Institute, PO Box 2533, Abu Dhabi, United Arab Emirates;1. Centre for Astrophysics and Planetary Science, School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, United Kingdom.;2. Computational Life and Medical Sciences Network, University College London, 20 Gordon Street, London WC1H, United Kingdom.;1. Department of Marine Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand;2. NIWA/University of Otago Research Centre for Oceanography, PO Box 56, Dunedin 9054, New Zealand;3. Department of Bioengineering, University of Washington, Washington 98250, USA;4. Friday Harbor Laboratories, University of Washington, Washington 98250, USA |
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| Abstract: | A quantitative biochronological study by Cody et al. (2008) integrates comprehensive diatom biostratigraphy, magnetostratigraphy, and tephrostratigraphy from 32 Neogene sections around the Southern Ocean and Antarctic continental margin. A recent method, known as Constrained Optimization (CONOP), which can be viewed as a multidimensional version of graphic correlation, is applied to that very interesting database.The goal of the present paper is to discuss some theoretical aspects of quantitative biochronology and to compare the constrained optimization with the deterministic method called Unitary Associations (UAM), a graph theoretical model. We illustrate the fact that the UAM is an extremely powerful and unique theory allowing an in-depth analysis of the internal conflicting inter-taxon stratigraphic relationships, inherent to any complex biostratigraphical database. |
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