A preliminary OSL chronology for coastal dunes on Moreton island, Queensland, Australia – Marginal deposits of A large-scale quaternary shelf sediment system

Brooke, Brendan; Pietsch, Tim; Olley, Jon; Sloss, Craig R.; Cox, Malcolm

doi:10.1016/j.csr.2015.06.002

Cited by 25 publications

(19 citation statements)

References 59 publications

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“…However, during the SLM2, bedrock constraints produced an open coast paleoshoreline, indicating less potential for headland-attached shelf sediment body accumulation, and for a potentially connected longshore sand transport system. We find no evidence for shelf sand bodies, and under an easterly dominant wave climate, we expect that the paleoshorelines forming during SLM2 were characterised by onshore deposition in the form of sand barrier-dune complexes 36,37 , especially on the south QLD -north NSW area 38 , with gentle slopes and smooth and continuous paleoshorline morphology ( Fig. 3).…”

Section: Resultsmentioning

confidence: 97%

Shelf sand supply determined by glacial-age sea-level modes, submerged coastlines and wave climate

Ribó

Goodwin

O’Brien

et al. 2020

Sci Rep

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Submerged paloeshorelines preserved on the continental shelf indicate the depths of the most frequent (modal) low sea-levels within the glacial stages of the Late Quaternary. Here we have determined the south-east Australian shelf configuration when sea level was 40 m and 60 m below present-day sealevel (depths of the most persistent paleoshorelines within the last 120 ka), and we resolve the wave climate variations influencing the sediment transport pathways over this period. We present evidence demonstrating that the combination of shelf morphological evolution, changes in sea-level and variations in wave climate is responsible for latitudinal changes in sediment transport and deposition during the interglacial states. the paleoshoreline and shelf evolution is key to understanding the distribution of present-day shelf sand deposits and the contemporary sand budget response to future wave climate changes.wave climate throughout the glacial cycle, to resolve the connectivity and longshore sediment transport paths during the Late Quaternary glacial and interglacial cycles. The definition of paleo-sediment transport and relict sand bodies is essential data to apply to the projection of modern coastline response to net changes in wave climate, sediment transport and sea levels over the coming century. Scientific RepoRtS | (2020) 10:462 | https://doi.Figure 7. Conceptual model showing the shelf sand deposits evolution with changes in sea-level over shallow (a) and steep (b) slope gradients (oblique wave energy is assumed for both scenarios).Scientific RepoRtS | (2020) 10:462 | https://doi.

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Section: Resultsmentioning

confidence: 97%

Shelf sand supply determined by glacial-age sea-level modes, submerged coastlines and wave climate

Ribó

Goodwin

O’Brien

et al. 2020

Sci Rep

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“…More recently, the dune fields have become the focus of renewed geochronological (e.g. Brooke, Pietsch, Olley, Sloss, & Cox, 2015;Walker, Lees, Olley, & Thompson, 2018) and paleoenvironmental investigations (e.g. Barr et al, 2013;Cadd et al, 2018;Chang et al, 2015;Levin, 2011;Levin, Jablon, Phinn, & Collins, 2017;Moss, Tibby, Petherick, McGowan, & Barr, 2013;Petherick, McGowan, & Moss, 2008).…”

Section: Introductionmentioning

confidence: 99%

High-resolution remapping of the coastal dune fields of south east Queensland, Australia: a morphometric approach

2019

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The sand islands and shore-attached dune fields of south east Queensland form the world's oldest and largest coastal sand dune system. Here we present updated morphological maps for the dune fields based on topographic expression and geomorphic relationships. Individual dunes were delineated using high-resolution elevation data and were grouped into morphosequences based on the elevation, drainage characteristics and slope characteristics of the individual dunes. The slope characteristics focussed on high resolution derived slope-curvature and slope-elevation parameters. Morphosequences were recognised from cross-cutting relationships and relative position in the dune field. Our method was developed for the Cooloola Sand Mass and then applied to Fraser Island, Moreton Island and North Stradbroke Island, the other major sand islands in south east Queensland. In total, five Holocene and four Pleistocene units have been identified. The new mapping underpins current work on the geomorphic evolution of the dune fields.

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“…NSI is the second largest sand island in the world (285 km 2 ) (Barr et al, 2013). It has been hypothesised that sand bodies in south-east Queensland (North Stradbroke, Moreton and Fraser Islands and the Cooloola sand mass) were formed during transgressive sea levels over the past c. 500 000 years (Ward, 2006), with recent optically stimulated luminescence (OSL) ages on neighbouring Moreton Island largely congruent with this time frame (Brooke et al, 2015). Through most of this time, NSI was part of the Australia mainland and was only separated during interglacial sea-level highstands (Page and Hughes, 2007).…”

Section: Site Descriptionmentioning

confidence: 99%

Persistence of wetlands on North Stradbroke Island (south‐east Queensland, Australia) during the last glacial cycle: implications for Quaternary science and biogeography

Tibby

Barr

Marshall

et al. 2017

J Quaternary Science

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Few Australian wetlands have persisted since the Last Glacial Maximum, with fewer still in existence through the entire last glacial cycle. The absence of wetlands, which itself indicates periods of moisture deficit, means there are few continuous climate and environmental change records covering this critical period. The lack of wetland persistence also raises the question of how plant and animal species that require permanent wetlands survived the last glacial cycle. Sixteen wetlands have been cored and dated on North Stradbroke Island (Minjerribah) – a large east Australian sand island – with basal dates reported from 10 sites for the first time. These wetlands range in age to over 200 000 years old, with six dating to the Last Glacial Maximum or earlier. There is no evidence of a stratigraphic discontinuity in the radiocarbon‐based age–depth profiles, suggesting continuous deposition of highly organic sediment through the period covered by these ages (c. 40 ka). The persistence of these wetlands suggests that for much of the last 40 000 years, and for perhaps much longer, the regional moisture balance has been positive. Over the last glacial cycle, persistently wet conditions may have provided a refuge from regional drying, and thus contributed to the high genetic diversity of rainforest plants in the region. Vegetation and climate records from these sites will allow hypothesis testing about the drivers of both local and regional climate variability. Copyright © 2017 John Wiley & Sons, Ltd.

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A preliminary OSL chronology for coastal dunes on Moreton island, Queensland, Australia – Marginal deposits of A large-scale quaternary shelf sediment system

Cited by 25 publications

References 59 publications

Shelf sand supply determined by glacial-age sea-level modes, submerged coastlines and wave climate

Shelf sand supply determined by glacial-age sea-level modes, submerged coastlines and wave climate

High-resolution remapping of the coastal dune fields of south east Queensland, Australia: a morphometric approach

Persistence of wetlands on North Stradbroke Island (south‐east Queensland, Australia) during the last glacial cycle: implications for Quaternary science and biogeography

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