Radiocarbon-calibrated multiple amino acid geochronology of holocene molluscs from Bramble and Rib Reefs (Great Barrier Reef, Australia)

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dc.contributor.authorKosnik, MAen_AU
dc.contributor.authorKaufman, DSen_AU
dc.contributor.authorHua, Qen_AU
dc.date.accessioned2014-07-02T01:31:43Zen_AU
dc.date.available2014-07-02T01:31:43Zen_AU
dc.date.issued2013-04-01en_AU
dc.date.statistics2014-07-02en_AU
dc.description.abstractCalibrated amino acid racemisation methods allow paleobiologists to quantify the age distributions of fossil assemblages. Focussing on 110 Scissulina dispar and 110 Liloa sp. specimens collected from Bramble and Rib Reefs (central Great Barrier Reef, Australia), we create calibration curves for seven amino acids for each taxon. Using these curves we calculate seven quasi-independent age estimates for each specimen. We evaluate each calibration curve for consistency and use the weighted mean and uncertainty of the quasi-independent ages as the specimen age for geochronological analyses. We extend the "Y" criterion for screening specimens and describing the precision of an AAR dataset from two amino acids to any number of amino acids. Using weighted mean ages and Y < 0.2 we demonstrate that the top 1.4 m of Bramble and Rib Reefs preserve remarkably well-mixed shell assemblages spanning from living to similar to 3400 years old with median ages of 373 and 326 years old, respectively. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationKosnik, M. A., Kaufman, D. S., & Hua, Q. (2014). Radiocarbon-calibrated multiple amino acid geochronology of holocene molluscs from Bramble and Rib Reefs (Great Barrier Reef, Australia). Quaternary Geochronology, 16, 73-86. doi:10.1016/j.quageo.2012.04.024en_AU
dc.identifier.govdoc5257en_AU
dc.identifier.issn1871-1014en_AU
dc.identifier.journaltitleQuaternary Geochronologyen_AU
dc.identifier.pagination73-86en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.quageo.2012.04.024en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5726en_AU
dc.identifier.volume16en_AU
dc.language.isoenen_AU
dc.publisherElsevier Ireland Ltden_AU
dc.subjectCarbon 14en_AU
dc.subjectAge estimationen_AU
dc.subjectAmino acidsen_AU
dc.subjectMolluscsen_AU
dc.subjectSedimentsen_AU
dc.subjectQuaternary perioden_AU
dc.titleRadiocarbon-calibrated multiple amino acid geochronology of holocene molluscs from Bramble and Rib Reefs (Great Barrier Reef, Australia)en_AU
dc.typeJournal Articleen_AU
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