Please use this identifier to cite or link to this item:
|Title:||Patterns of aeolian deposition in subtropical Australia through the last glacial and deglacial periods|
|Keywords:||X-ray fluorescence analysis|
|Publisher:||Cambridge University Press|
|Citation:||Lewis, 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, 1-23. doi:10.1017/qua.2020.117|
|Abstract:||Debate 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 Washington|
|Appears in Collections:||Journal Articles|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.