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Seawater Chemistry, Biomineralization and the Fossil Record of Calcareous Organisms

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/38432

Title: Seawater Chemistry, Biomineralization and the Fossil Record of Calcareous Organisms
Authors: Taylor, Paul D. Browse this author
Keywords: Aragonite and calcite seas
Biomineralization
Evolution
Taphonomy
Hardgrounds
Issue Date: 2008
Publisher: 21st Century COE for Neo-Science of Natural History, Hokkaido University
Citation: Edited by Hisatake Okada, Shunsuke F. Mawatari, Noriyuki Suzuki, Pitambar Gautam. ISBN: 978-4-9903990-0-9
Journal Title: Origin and Evolution of Natural Diversity : Proceedings of the International Symposium, The Origin and Evolution of Natural Diversity, held from 1-5 October 2007 in Sapporo, Japan
Start Page: 21
End Page: 29
Abstract: Oscillations in seawater chemistry have characterized at least the last 600 million years of earth history. Three phases of aragonite seas have been separated by two of calcite seas, the former due to high molar ratios of Mg/Ca in seawater and the latter to low ratios. During aragonite seas, inorganic marine cements and ooids are aragonitic, whereas during calcite seas they are calcitic. Recent interest has focused on the effects of this cyclical change in seawater chemistry on biomineralization, as well as on taphonomy (including diagenesis) and hence fossil preservation. Although there is a need for rigorous testing of hypotheses, data on the geological distributions of aragonite and calcite skeletons among marine invertebrates lends variable support to links between seawater chemistry and: (1) de-novo evolution of calcite vs aragonite skeletons, (2) switchovers in mineralogy during subsequent clade evolution, (3) the relative success of clades using calcite or aragonite as biominerals, and (4) the development of hardgrounds with associated sclerobiont communities.
Description: International Symposium, "The Origin and Evolution of Natural Diversity". 1–5 October 2007. Sapporo, Japan.
Conference Name: International Symposium, "The Origin and Evolution of Natural Diversity"
Conference Place: Sapporo
Type: proceedings
URI: http://hdl.handle.net/2115/38432
Appears in Collections:Origin and Evolution of Natural Diversity > Proceedings

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