Depositional timing and palaeoclimate interpretation of the Tamala Limestone aeolianites in Shark Bay, Western Australia

Vimpere, Lucas; Piero, Nicolò Del; Cotonnec, Aymeric Le; Kindler, Pascal; Castelltort, Sébastien

doi:10.1016/j.aeolia.2021.100770

Cited by 7 publications

(3 citation statements)

References 79 publications

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“…In general, dunes align with the present global circulation pattern, regardless of their age (Figure 13), which likely suggests a prevalent control of long‐term atmospheric circulation on parabolic dunes orientations over short‐term variations in local wind direction. As such, parabolic dunes can potentially entomb cyclic changes in atmospheric cells if no substantial remobilisation occurs afterwards (e.g., Rendall et al, 2022; Vimpere et al, 2022). Indeed, the different atmospheric cells are known to contract or expand and shift position in response to interglacial/glacial cycles.…”

Section: Discussionmentioning

confidence: 99%

“…Both categories show the exact same distribution of their elongation (d) hence defining morphological boundaries for parabolic dunes evolution independently of environmental conditions under which they develop. (e.g., Rendall et al, 2022;Vimpere et al, 2022). Indeed, the different atmospheric cells are known to contract or expand and shift position in response to interglacial/glacial cycles.…”

Section: Parabolic Dunes Morphology and Wind Regimesmentioning

confidence: 99%

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Parabolic dune distribution, morphology and activity during the last 20 000 years: A global overview

Vimpere

2023

Earth Surf Processes Landf

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Parabolic dunes form and migrate in almost every climate and geographic zones of the world, ranging from the tropical coastlines to the arid continental deserts. Despite their extensive distribution and their importance within the aeolian sediment landscape, the understanding of their morphological development, activity and link with climates remains somewhat limited to local or regional scales. A good understanding of the present climate conditions under which parabolic dunes are formed and/or reactivated would be significantly helpful to constrain past climate models. Similarly, an improved knowledge of parabolic dunes behaviour during past climatic episodes would provide some valuable long‐term data to better predict their future activity. This review first aims at providing a non‐exhaustive global database on parabolic dune morphology and the present wind regimes with which they are associated. To do so, the morphology of 750 dunes distributed worldwide was first analysed using a high‐resolution global digital elevation model, suggesting an intrinsic relationship between the different measured morphoparameters. The analysis of the associated local wind regimes shows that parabolic dunes develop under strong unidirectional winds, which are more conspicuous in coastal than continental environments. Dunes of different ages are globally aligned with present prevailing winds, which suggests a prevalent control of long‐term global atmospheric circulation on dune orientations. Finally, this study explores the link between parabolic dune activity and climates over the past 20 000 years by reviewing ages from the literature and combining them with the ones compiled in the INQUA Dunes Atlas Chronologic Database. Overall, it appears that changes towards drier conditions have triggered dunes migration during both warm and cold periods of the Last Glacial Maximum, Holocene Climate Optimum, Roman Climate Optimum, Medieval Climate Optimum and Little Ice Age. The present day aeolian activity is predominantly linked with deteriorating environmental conditions caused by human disturbances.

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Section: Discussionmentioning

confidence: 99%

Section: Parabolic Dunes Morphology and Wind Regimesmentioning

confidence: 99%

Parabolic dune distribution, morphology and activity during the last 20 000 years: A global overview

Vimpere

2023

Earth Surf Processes Landf

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“…Quaternary carbonate aeolianites are widespread along the present‐day Western Australian coast (Brooke, 2001), and they can form massive carbonate structures. For example, Shark Bay is protected by stacked aeolianite islands up to 150 km long and >250 m thick (Frébourg et al, 2008; Le Guern & Davaud, 2005; Logan et al, 1970; Vimpere et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

et al. 2023

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Linear buildups formed in tropical carbonate environments are often interpreted as bioconstructed reefs. Nevertheless, coastal processes can also form extensive sedimentary ridges exhibiting buildup morphologies. This study investigates two Miocene ridges developed along the Australian North West Shelf using 3D seismic and well data. Ridge 1 is ca. 30 m thick and >60 km long, and it is made of foraminiferal pack‐grainstones. It protects a lagoon with pinnacle morphologies. Ridge 2 is ca. 150 m thick and >80 km long. It is composed of quartz sand forming lobes. Both ridges have a continuous curvilinear front and are in a mid‐shelf setting. They mimic the modern Australian coastline. It is then proposed that Ridge 1 is either: (1) a barrier reef developed on a drowned shoreline, or (2) stacked carbonate aeolianites and beachrocks acting as a barrier. Ridge 2 is interpreted as stacked deltaic sands. This study demonstrates that lithified and buried coastal features of carbonate and siliciclastic nature can form extensive ridges exhibiting buildup morphologies. It is proposed that ridges formed by stacked coastal features are overall continuous with a curvilinear front, while reefal ridges are more discontinuous and exhibit deeper and more stable passes.

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Weathering and Surface Materials and Patterns

Goudie

2022

Desert Landscapes of the World With Google Earth

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Depositional timing and palaeoclimate interpretation of the Tamala Limestone aeolianites in Shark Bay, Western Australia

Cited by 7 publications

References 79 publications

Parabolic dune distribution, morphology and activity during the last 20 000 years: A global overview

Parabolic dune distribution, morphology and activity during the last 20 000 years: A global overview

Differentiating reefal ridges from relict coastal ridges: Lessons from the seismic geomorphologic study of buried Miocene buildups (North West Shelf, Australia)

Weathering and Surface Materials and Patterns

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