Publications
A revised chronology and depositional history for the Outer Arumpo lunette, Willandra Lakes Region World Heritage Area, NSW
Lakes in the Willandra Lakes Region World Heritage Area exhibit distinct hydrologic histories, challenging the long-held assumption that Lake Mungo's depositional record is representative of the entire system. A new study reveals that the Outer Arumpo (OA) lunette experienced significant lake level fluctuations between ~40–38 ka ago, contrasting with the relatively stable conditions at Lake Mungo during the same period. Bayesian modeling of 52 single-grain OSL ages and sediment micromorphological analysis across seven stratigraphic units demonstrates that OA's hydrologic history is unique, with lake filling occurring from ~80–56 ka ago and subsequent rapid fluctuations. This research underscores the need for site-specific stratigraphic frameworks to accurately interpret landscape changes in multi-lake systems.
Introduction: Southern Hemisphere records of Late Quaternary climate change, people and dust
A Special Issue of the Journal of Quaternary Science explores Late Quaternary climate change, human-environment interactions, and dust records across the Southern Hemisphere. The research highlights diverse regional studies, including investigations into peatland initiation in Subantarctic Islands, palaeolake dynamics in southern Africa, marine bioerosion traces in Argentina, and glacial fluctuations in the Andes. Australian contributions focus on hydroclimatic variability in the Kimberley region, lake level history in the Willandra Lakes World Heritage area, and vegetation shifts on Minjerribah and K'gari islands. The studies utilize a range of methods such as sedimentology, geochemistry, pollen analysis, luminescence dating, and multi-proxy approaches to reconstruct past environmental conditions and provide insights into ongoing climate change impacts.
Lead (Pb) isotope signatures for silcrete sources from the Willandra Lakes region, Australia: A pilot study of a new method for provenancing silcrete artefacts
A pilot study demonstrates that lead (Pb) isotope analysis can effectively differentiate silcrete sources within the UNESCO World Heritage-listed Willandra Lakes Region, Australia. The research reveals distinct Pb isotope signatures between silcrete sources, enabling potential provenance tracking of artefacts. While intra-source variation lacks spatial patterning, inter-source differences are clear, particularly for more distant sources. This method offers a promising new approach to investigate how silcrete was utilized and transported across landscapes in prehistoric times.
Long‐term hydrologic connectivity on the Australian dryland margins: Evidence from the Willandra Lakes World Heritage Area over the last 60 ky
A new study reveals that the Willandra Lakes Region experienced rapid and extreme hydrologic shifts during the Last Glacial Maximum (LGM), despite lower precipitation and increased evaporation. Unlike prior periods where permanent lakes persisted due to higher catchment precipitation, the LGM saw rapid cycles of lake filling and drying, driven by seasonal snowmelt from highland headwaters and reduced vegetation cover, which enhanced runoff efficiency. This research integrates sediment-based chronologies, water-flux modeling, and palaeoclimate reconstructions to quantify thresholds for lake system filling and reconstruct past hydroclimatic conditions over the last 60,000 years.
Radiocarbon and luminescence age estimate database for the Willandra Lakes Region World Heritage Area: a reliability-assurance assessment
A reliability-assured chronostratigraphic framework for the Willandra Lakes Region World Heritage Area reveals distinct palaeoenvironmental phases spanning from 56.2 ± 3.0 to 17.2 ± 0.7 ka, based on high-confidence optically stimulated luminescence (OSL) and radiocarbon age estimates. The study identified three lacustrine phases: a system-wide high-water period (~55–35 ka cal BP), a short pulse reaching Lake Outer Arumpo (~29–24 ka cal BP), and a final saline phase at Lake Mungo (~21–17 ka cal BP) while freshwater conditions persisted at Lake Mulurulu. Only 62 of 143 radiocarbon ages linked to archaeological features were deemed reliable, highlighting gaps in documenting land-use history. The research compiled and ranked 661 age estimates (radiocarbon, OSL, thermoluminescence), emphasizing the need for expanded, contextually diverse geochronological data to clarify both palaeoenvironmental change and human occupancy patterns.
Treading lightly on Country: developing a co-designed pathway for the study of the Willandra’s ancient environments
A groundbreaking co-designed research protocol for the Willandra Lakes Region World Heritage Area (WLRWHA) establishes a framework for Earth Science studies that prioritizes Indigenous knowledge and collaboration with Traditional Owners. This approach, developed alongside the Willandra Lakes Region Aboriginal Advisory Group (WLRAAG), addresses historical colonial biases in geological research by integrating Research Principals and practical guidance into study protocols. The protocol ensures respectful engagement with the landscape while advancing scientific understanding of ancient environments. It serves as a model for decolonizing Earth Science research through trust-building, mutual learning, and sustainable practices that 'tread lightly' on Country.
Life stories
Archaeological discoveries at the Willandra Lakes Region, a UNESCO World Heritage Site in western New South Wales, have reshaped our understanding of Australia's human history. The skeletal remains of Mungo Lady (WLH 1) and Mungo Man (WLH 3), dated to approximately 42,000 years ago during the late Pleistocene era, were found by geologist Jim Bowler in 1968 and 1974, respectively. These findings challenged the prevailing belief that Aboriginal Australians had arrived on the continent only a few thousand years prior, demonstrating instead a deep temporal continuity spanning tens of thousands of years. The discoveries, made during a geomorphological study of the region's interconnected lake system, also highlight the significance of Indigenous knowledge and land management practices in shaping the landscape over millennia.
Biocultural GIS mapping: A Living Country and Terra Nullius, Willandra Lakes Region World Heritage Area (WLRWHA), NSW
A groundbreaking biocultural GIS mapping study of the Willandra Lakes Region World Heritage Area (WLRWHA) reveals critical insights into the interplay between Indigenous land management and ecological dynamics. The research integrates traditional knowledge with modern geospatial analysis to challenge historical narratives, particularly the concept of 'Terra Nullius,' by demonstrating sustained human occupation and biocultural interactions over millennia. The study employs advanced GIS techniques to map land use patterns, biodiversity hotspots, and cultural landscapes, providing a holistic framework for understanding the region's ecological and social history. This approach offers a model for future heritage management, emphasizing the importance of integrating Indigenous perspectives with scientific data.
Biocultural mapping: unpacking the myth of an unsuitable Country in the arid zone, Willandra Lakes Region World Heritage Area, Australia
Research reveals that the Willandra Lakes Region, previously considered unsuitable for habitation due to arid conditions and European biases, was actively inhabited by Aboriginal communities prior to colonization. Using Exploratory GIS methods, the study demonstrates the existence of diverse biocultural zones of land use and occupancy, challenging the myth of 'Terra Nullius' and highlighting the ecological and hydrological significance of these areas. The findings underscore the need for biocultural GIS mapping tools to better understand and protect habitable spaces in arid regions, which have been historically ignored or damaged by settlements.
Digital Storytelling and 3D Technologies for Visitor Experience and Contested Heritage Preservation
Storytelling techniques significantly enhance the emotional engagement and immersion of virtual heritage experiences when combined with 3D scanning technologies. This study, focusing on the fossilized Indigenous footprints at Australia's Willandra Lakes Region (a UNESCO World Heritage Site), demonstrates that narrative transportation—triggering emotional arousal—deepens visitor connection to contested heritage. The research provides best practice guidelines for using advanced 3D scanning and AR/VR to recreate vulnerable sites, offering a scalable approach to preserve and present fragile cultural landmarks while ensuring authenticity in digital reconstructions.
Exploratory GIS: Modelling Past Land Use and Occupancy with Functional Connectivity, Willandra Lakes Region World Heritage Area, NSW, Australia
GIS models reveal critical pathways of past land use and occupancy within the Willandra Lakes Region World Heritage Area, highlighting how 19th-century European settlement disrupted traditional functional connectivity. By mapping potential connections between ecologically significant patches and key hydrology, these models expose previously unrecognized impacts on Country, including exploitation through fence construction and groundwater appropriation. The iterative, exploratory nature of the approach allows for multiple interpretations of space, offering diverse perspectives on pre-European settlement patterns and their lasting consequences.
Preserving the Ancient Human Trackways Site in the Willandra Lakes World Heritage Area
In 2003, over 400 ancient human footprints were discovered preserved in silt within Australia's Willandra Lakes World Heritage Area. Optically stimulated luminescence dating revealed these trackways were created approximately 20,000 years ago, offering a unique snapshot of life during the transition to a drier Australian climate. The site, exposed by erosion, faced significant preservation challenges due to its remote location and harsh environmental conditions. After collaborative discussions among First Nations custodians, archaeologists, and government agencies, the decision was made to rebury the excavated footprints as the most practical conservation strategy. While this approach protects the site from further degradation, new footprints continue to emerge periodically, necessitating ongoing management. Future work includes creating detailed 3-D scans of all prints, enhancing our understanding of this significant archaeological and cultural resource.
Deep history and deep listening: Indigenous knowledges and the narration of deep pasts
A deep history approach that integrates Indigenous knowledges with scientific historicism can reveal more comprehensive narratives of the past. This study demonstrates how such integration, termed 'deep listening,' fosters mutual understanding and addresses challenges in cross-cultural historical interpretation. Using the Willandra Lakes Region in Australia as a case study, it shows how combining Indigenous knowledge-systems with Western historiography can produce a richer, more mutually satisfying deep history of the region.
Quantitative assessment of the oxygen isotope composition of fish otoliths from Lake Mungo, Australia
A quantitative assessment of oxygen isotope composition in fish otoliths from Lake Mungo, Australia, reveals that the isotopic signatures previously linked to high evaporation during dry conditions are better explained by evaporation acting on full lakes rather than lake drying. This study challenges prior interpretations by constructing a mass balance model to evaluate the impact of lake desiccation on water δ18O and comparing it with otolith records from the last glacial maximum (LGM). The findings provide subannual-scale insights into flooding and drying regimes, bridging the gap between archaeological evidence and palaeoenvironmental records in the UNESCO-listed Willandra Lakes Region. This approach offers a more nuanced understanding of hydrological changes linked to human occupation and environmental shifts over millennia.
A high-resolution late Quaternary depositional history and chronology for the southern portion of the Lake Mungo lunette, semi-arid Australia
A high-resolution depositional history of the Lake Mungo lunette, part of Australia's Willandra Lakes Regionreveals three distinct late Quaternary phases spanning over 100,000 years. Using sedimentological analysis and 56 single-grain optically stimulated luminescence (OSL) age estimates combined with Bayesian modeling, researchers identified depositional phases >100 ka, ~65–33 ka, and ~30–16 ka. Notably, twelve of thirteen previously dated samples from Bowler et al. (2003) were redated to younger ages, aligning them with independent age controls and this study's findings. This work establishes a refined chronology for the lunette, offering a framework for future consistency in palaeoenvironmental interpretations along its length.
Conquest of the deserts
Archaeological research at the Willandra Lakes Region challenges the long-held assumption that Australia's arid zones were abandoned during the Last Glacial Maximum (LGM) and only recolonized later. Contrary to this model, evidence suggests that humans inhabited even the most inhospitable deserts in central and western Australia before the LGM, including areas like the Nullarbor Plain and Western Desert. This finding reshapes our understanding of human adaptation to extreme environments and Australia's role in global prehistory. The study, rooted in extensive interdisciplinary research—unprecedented in scale for any Australian region—draws on geomorphological models proposed by Jim Bowler and archaeological insights from figures like Mike Smith and Scott Cane. By integrating these perspectives, the research offers a nuanced narrative of human resilience and persistence in arid landscapes over millennia.
Early silcrete heat treatment in Central Australia: Puritjarra and Kulpi Mara
Research on the Willandra Lakes Region reveals a distinct evolutionary trend in stone heat treatment practices in Central Australia, marking one of the earliest instances of such techniques on the continent. Unlike other regions where heat treatment became more prevalent over time, Central Australia shows a decline from high levels during the Pleistocene to moderate levels in the Mid- to Late Holocene. This transition suggests regional diversification and adaptation to local conditions, contradicting the notion of technological uniformity across Australia. The study employs new data on the antiquity of heat treatment to trace its evolution, providing insights into early human technological practices.
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