Patterns of aeolian deposition in subtropical Australia through the last glacial and deglacial periods

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dc.contributor.authorLewis, RJen_AU
dc.contributor.authorTibby, Jen_AU
dc.contributor.authorArnold, LJen_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorBarr, Cen_AU
dc.contributor.authorNegus, PMen_AU
dc.contributor.authorMariani, Men_AU
dc.contributor.authorPenny, Den_AU
dc.contributor.authorChittleborough, Den_AU
dc.contributor.authorMoss, Een_AU
dc.date.accessioned2021-06-10T01:59:55Zen_AU
dc.date.available2021-06-10T01:59:55Zen_AU
dc.date.issued2021-02-08en_AU
dc.date.statistics2021-06-07en_AU
dc.description.abstractDebate about the nature of climate and the magnitude of ecological change across Australia during the last glacial maximum (LGM; 26.5–19 ka) persists despite considerable research into the late Pleistocene. This is partly due to a lack of detailed paleoenvironmental records and reliable chronological frameworks. Geochemical and geochronological analyses of a 60 ka sedimentary record from Brown Lake, subtropical Queensland, are presented and considered in the context of climate-controlled environmental change. Optically stimulated luminescence dating of dune crests adjacent to prominent wetlands across North Stradbroke Island (Minjerribah) returned a mean age of 119.9 ± 10.6 ka; indicating relative dune stability soon after formation in Marine Isotope Stage 5. Synthesis of wetland sediment geochemistry across the island was used to identify dust accumulation and applied as an aridification proxy over the last glacial-interglacial cycle. A positive trend of dust deposition from ca. 50 ka was found with highest influx occurring leading into the LGM. Complexities of comparing sedimentary records and the need for robust age models are highlighted with local variation influencing the accumulation of exogenic material. An inter-site comparison suggests enhanced moisture stress regionally during the last glaciation and throughout the LGM, returning to a more positive moisture balance ca. 8 ka. © 2021 University of Washingtonen_AU
dc.identifier.citationLewis, R. J., Tibby, J., Arnold, L. J., Gadd, P., Jacobsen, G., Barr, C., Negus, P. M., Mariani, M., Penny, D., Chittleborough, D. & Moss, E. (2021). Patterns of aeolian deposition in subtropical Australia through the last glacial and deglacial periods. Quaternary Research, 102, 68-90. doi:10.1017/qua.2020.117en_AU
dc.identifier.issn1096-0287en_AU
dc.identifier.journaltitleQuaternary Researchen_AU
dc.identifier.pagination68-90en_AU
dc.identifier.urihttps://doi.org/10.1017/qua.2020.117en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10843en_AU
dc.identifier.volume102en_AU
dc.language.isoenen_AU
dc.publisherCambridge University Pressen_AU
dc.subjectX-ray fluorescence analysisen_AU
dc.subjectLuminescenceen_AU
dc.subjectAge estimationen_AU
dc.subjectDustsen_AU
dc.subjectPleistocene epochen_AU
dc.subjectAustraliaen_AU
dc.subjectQueenslanden_AU
dc.titlePatterns of aeolian deposition in subtropical Australia through the last glacial and deglacial periodsen_AU
dc.typeJournal Articleen_AU
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