Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies

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dc.contributor.authorKosnik, MAen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorKaufman, DSen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.date.accessioned2016-09-07T01:30:45Zen_AU
dc.date.available2016-09-07T01:30:45Zen_AU
dc.date.issued2014-11-15en_AU
dc.date.statistics2016-09-07en_AU
dc.description.abstractCarbon-14 calibrated amino acid racemization (14C/AAR) data and lead-210 (210Pb) data are used to examine sediment accumulation rates, stratigraphic order, and the extent of time-averaging in sediments collected from the One Tree Reef lagoon (southern Great Barrier Reef, Australia). The top meter of lagoonal sediment preserves a stratigraphically ordered deposit spanning the last 600 yrs. Despite different assumptions, the 210Pb and 14C/AAR chronologies are remarkably similar indicating consistency in sedimentary processes across sediment grain sizes spanning more than three orders of magnitude (0.1–10 mm). Estimates of long-term sediment accumulation rates range from 2.2 to 1.2 mm yr−1. Molluscan time-averaging in the taphonomically active zone is 19 yrs, whereas below the depth of final burial (~15 cm), it is ~110 yrs/5 cm layer. While not a high-resolution paleontological record, this reef lagoon sediment is suitable for paleoecological studies spanning the period of Western colonization and development. This sedimentary deposit, and others like it, should be useful, albeit not ideal, for quantifying anthropogenic impacts on coral reef systems.© 2014, The Author(s).en_AU
dc.identifier.citationKosnik, M., Hua, Q., Kaufman, D., & Zawadzki, A. (2014). Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies. Coral Reefs, 34(1), 215-229. doi:10.1007/s00338-014-1234-2en_AU
dc.identifier.govdoc7072en_AU
dc.identifier.issn1432-0975en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleCoral Reefsen_AU
dc.identifier.pagination215-229en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s00338-014-1234-2en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7484en_AU
dc.identifier.volume34en_AU
dc.language.isoenen_AU
dc.publisherSpringer Linken_AU
dc.subjectCarbonatesen_AU
dc.subjectCarbon 14en_AU
dc.subjectDataen_AU
dc.subjectSedimentsen_AU
dc.subjectMolluscsen_AU
dc.subjectReefsen_AU
dc.titleSediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologiesen_AU
dc.typeJournal Articleen_AU
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