Tim J Cohen
Biographic Data
| ID | 4129483 |
|---|---|
| NAME | Tim J Cohen |
| GIVEN NAMES | Tim J |
| FAMILY NAME | Cohen |
| SIGNATURE | COHEN T J |
| AFFILIATIONS | University of Wollongong |
| ORCID | 0000-0003-4081-9523 |
| VERIFIED | Yes |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 19 |
| WORKS AS AUTHOR | 13 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2007 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
Rapid minimally invasive subsurface archaeological site prospection on Roti Island, Indonesia
SWOT satellite assessment for monitoring the extreme 2025 floods in Australia’s inland Channel Country
In early 2025 mainland Australia experienced one of the most extreme inland flooding events in the observational period. Extensive floodwaters gradually flowed southward toward Kati Thanda–Lake Eyre via the ‘Channel Country’, with the Cooper Creek basin being one of the most severely affected regions. Typically considered as a low-gradient dryland catchment, the Cooper recorded its highest-ever flood with water depths reaching 13.4 m in the more …
Palaeochannels of the upper central Murray and lower Goulburn rivers, southeastern Australia
Palaeochannel systems are characteristic of alluvial plains across large parts of the Australian continent, but their evolution and modes of formation are still only partly understood. In this study, the fluvial landscapes of the upper central Murray River, and the lower Goulburn River were assessed by mapping palaeochannel remnants and fluvial terraces using high-resolution digital elevation models. This allowed for a classification of terrace a…
SahulArch
Reliable chronological frameworks for archaeological sites are essential for accurate interpretations of the past. Geochronology represents the core of interdisciplinary research because it allows integration of diverse data on a common timeline. Since the radiocarbon revolution in Australian archaeology in the 1950s, thousands of ages have been produced across Sahul (combined landmass of Australia and New Guinea). Methods such as thermoluminesce…
The Application of Pollen Radiocarbon Dating and Bayesian Age-Depth Modeling for Developing Robust Geochronological Frameworks of Wetland Archives
Wetland sediments are valuable archives of environmental change but can be challenging to date. Terrestrial macrofossils are often sparse, resulting in radiocarbon ( 14 C) dating of less desirable organic fractions. An alternative approach for capturing changes in atmospheric 14 C is the use of terrestrial microfossils. We 14 C date pollen microfossils from two Australian wetland sediment sequences and compare these to ages from other sediment fr…
A continental perspective on the timing of environmental change during the last glacial stage in Australia
The timing and duration of the coldest period in the last glacial stage, often referred to as the last glacial maximum (LGM), has been observed to vary spatially and temporally. In Australia, this period is characterised by colder, and in some places more arid, climates than today. We applied Monte-Carlo change point analysis to all available continuous proxy records covering this period, primarily pollen records, from across Australia (n = 37) t…
Diverse stone artefacts around Lake Woods, Central Northern Territory, Australia
Lake Woods is a large freshwater body on the northern edge of Australia's arid zone where research since the late 1960s has suggested late Pleistocene, later Holocene, and recent human occupations. We report on surface collections and test excavations undertaken at four sites on the western side of the lake basin in 2019. Each site produced a distinctive lithic assemblage, characterised by different types of shaped and retouched lithics and grind…
Climatically-Controlled River Terraces in Eastern Australia
In the tectonically stable rivers of eastern Australia, changes in response to sediment supply and flow regime are likely driven by both regional climatic (allogenic) factors and intrinsic (autogenic) geomorphic controls. Contentious debate has ensued as to which is the dominant factor in the evolution of valley floors and the formation of late Quaternary terraces preserved along many coastal streams. Preliminary chronostratigraphic data from riv…
Identifying extreme pluvials in the last millennia using optical dating of single grains of quartz from shorelines on Australia’s largest lake
The filling of Kati Thanda-Lake Eyre (KT-LE), Australia’s ‘inland sea’ has captured scientific and cultural interest for over a century and a half. However, despite the presence of multiple shorelines around the modern playa at or near the modern maximum lake-filling levels, no quantitative estimates of major late-Holocene filling events have ever been documented. We develop a preliminary chronological data set using single-grain optically stimul…
A soil Chronosequence on Lake Mega-Frome Beach Ridges and its Implications for Late Quaternary Pedogenesis and Paleoenvironmental Conditions in the Drylands of Southern Australia
The terminal lake systems of central Australia are key sites for the reconstruction of late Quaternary paleoenvironments. Paleoshoreline deposits around these lakes reflect repeated lake filling episodes and such landforms have enabled the establishment of a luminescence-based chronology for filling events in previous studies. Here we present a detailed documentation of the morphology and chemistry of soils developed in four well-preserved beach …
Late-Holocene climatic variability indicated by three natural archives in arid southern Australia
Three terrestrial climate proxies are used to investigate the evolution of Holocene palaeoenvironments in southern central Australia, all of which present a coherent record of palaeohydrology. Single-grain optically stimulated luminescence from sediments supplemented by 14 C from charcoal and lacustrine shells was obtained to date shoreline deposits (Lake Callabonna) and the adjacent Mt Chambers Creek alluvial fan. Our findings are complemented b…
Ten Trenches
Collaborative and cross-disciplinary research by a group of artists and scientists in an Australian rural setting generates data and ideas that form the basis of a wider understanding of the ramifications of global warming and cooling within the local, regional and national community. The work is viewed as an initial educational platform that will allow the public to see and understand the complexities of climate-based research
Mind the gap
The Holocene sedimentary record in southeastern Australia is present in a range of landscape settings, such as upland swamps (dells), internally drained lake basins, alluvial fans, and mid-catchment and lowland floodplains. An assessment of the best-constrained basal radiocarbon dates in valley-fill locations between 30 and 42°S and upstream of last-glacial eustatic influences yields an intriguing pattern. The record for fluvial sites with catchm…
Mind the gap
The Holocene sedimentary record in southeastern Australia is present in a range of landscape settings, such as upland swamps (dells), internally drained lake basins, alluvial fans, and mid-catchment and lowland floodplains. An assessment of the best-constrained basal radiocarbon dates in valley-fill locations between 30 and 42°S and upstream of last-glacial eustatic influences yields an intriguing pattern. The record for fluvial sites with catchm…
Late-Holocene climatic variability indicated by three natural archives in arid southern Australia
Three terrestrial climate proxies are used to investigate the evolution of Holocene palaeoenvironments in southern central Australia, all of which present a coherent record of palaeohydrology. Single-grain optically stimulated luminescence from sediments supplemented by 14 C from charcoal and lacustrine shells was obtained to date shoreline deposits (Lake Callabonna) and the adjacent Mt Chambers Creek alluvial fan. Our findings are complemented b…
SahulArch
Reliable chronological frameworks for archaeological sites are essential for accurate interpretations of the past. Geochronology represents the core of interdisciplinary research because it allows integration of diverse data on a common timeline. Since the radiocarbon revolution in Australian archaeology in the 1950s, thousands of ages have been produced across Sahul (combined landmass of Australia and New Guinea). Methods such as thermoluminesce…
The Application of Pollen Radiocarbon Dating and Bayesian Age-Depth Modeling for Developing Robust Geochronological Frameworks of Wetland Archives
Wetland sediments are valuable archives of environmental change but can be challenging to date. Terrestrial macrofossils are often sparse, resulting in radiocarbon ( 14 C) dating of less desirable organic fractions. An alternative approach for capturing changes in atmospheric 14 C is the use of terrestrial microfossils. We 14 C date pollen microfossils from two Australian wetland sediment sequences and compare these to ages from other sediment fr…
Mind the gap
The Holocene sedimentary record in southeastern Australia is present in a range of landscape settings, such as upland swamps (dells), internally drained lake basins, alluvial fans, and mid-catchment and lowland floodplains. An assessment of the best-constrained basal radiocarbon dates in valley-fill locations between 30 and 42°S and upstream of last-glacial eustatic influences yields an intriguing pattern. The record for fluvial sites with catchm…
Late-Holocene climatic variability indicated by three natural archives in arid southern Australia
Three terrestrial climate proxies are used to investigate the evolution of Holocene palaeoenvironments in southern central Australia, all of which present a coherent record of palaeohydrology. Single-grain optically stimulated luminescence from sediments supplemented by 14 C from charcoal and lacustrine shells was obtained to date shoreline deposits (Lake Callabonna) and the adjacent Mt Chambers Creek alluvial fan. Our findings are complemented b…
Ten Trenches
Collaborative and cross-disciplinary research by a group of artists and scientists in an Australian rural setting generates data and ideas that form the basis of a wider understanding of the ramifications of global warming and cooling within the local, regional and national community. The work is viewed as an initial educational platform that will allow the public to see and understand the complexities of climate-based research
A soil Chronosequence on Lake Mega-Frome Beach Ridges and its Implications for Late Quaternary Pedogenesis and Paleoenvironmental Conditions in the Drylands of Southern Australia
The terminal lake systems of central Australia are key sites for the reconstruction of late Quaternary paleoenvironments. Paleoshoreline deposits around these lakes reflect repeated lake filling episodes and such landforms have enabled the establishment of a luminescence-based chronology for filling events in previous studies. Here we present a detailed documentation of the morphology and chemistry of soils developed in four well-preserved beach …
Identifying extreme pluvials in the last millennia using optical dating of single grains of quartz from shorelines on Australia’s largest lake
The filling of Kati Thanda-Lake Eyre (KT-LE), Australia’s ‘inland sea’ has captured scientific and cultural interest for over a century and a half. However, despite the presence of multiple shorelines around the modern playa at or near the modern maximum lake-filling levels, no quantitative estimates of major late-Holocene filling events have ever been documented. We develop a preliminary chronological data set using single-grain optically stimul…
Climatically-Controlled River Terraces in Eastern Australia
In the tectonically stable rivers of eastern Australia, changes in response to sediment supply and flow regime are likely driven by both regional climatic (allogenic) factors and intrinsic (autogenic) geomorphic controls. Contentious debate has ensued as to which is the dominant factor in the evolution of valley floors and the formation of late Quaternary terraces preserved along many coastal streams. Preliminary chronostratigraphic data from riv…
A continental perspective on the timing of environmental change during the last glacial stage in Australia
The timing and duration of the coldest period in the last glacial stage, often referred to as the last glacial maximum (LGM), has been observed to vary spatially and temporally. In Australia, this period is characterised by colder, and in some places more arid, climates than today. We applied Monte-Carlo change point analysis to all available continuous proxy records covering this period, primarily pollen records, from across Australia (n = 37) t…
Diverse stone artefacts around Lake Woods, Central Northern Territory, Australia
Lake Woods is a large freshwater body on the northern edge of Australia's arid zone where research since the late 1960s has suggested late Pleistocene, later Holocene, and recent human occupations. We report on surface collections and test excavations undertaken at four sites on the western side of the lake basin in 2019. Each site produced a distinctive lithic assemblage, characterised by different types of shaped and retouched lithics and grind…
The Application of Pollen Radiocarbon Dating and Bayesian Age-Depth Modeling for Developing Robust Geochronological Frameworks of Wetland Archives
Wetland sediments are valuable archives of environmental change but can be challenging to date. Terrestrial macrofossils are often sparse, resulting in radiocarbon ( 14 C) dating of less desirable organic fractions. An alternative approach for capturing changes in atmospheric 14 C is the use of terrestrial microfossils. We 14 C date pollen microfossils from two Australian wetland sediment sequences and compare these to ages from other sediment fr…
SahulArch
Reliable chronological frameworks for archaeological sites are essential for accurate interpretations of the past. Geochronology represents the core of interdisciplinary research because it allows integration of diverse data on a common timeline. Since the radiocarbon revolution in Australian archaeology in the 1950s, thousands of ages have been produced across Sahul (combined landmass of Australia and New Guinea). Methods such as thermoluminesce…
Palaeochannels of the upper central Murray and lower Goulburn rivers, southeastern Australia
Palaeochannel systems are characteristic of alluvial plains across large parts of the Australian continent, but their evolution and modes of formation are still only partly understood. In this study, the fluvial landscapes of the upper central Murray River, and the lower Goulburn River were assessed by mapping palaeochannel remnants and fluvial terraces using high-resolution digital elevation models. This allowed for a classification of terrace a…
Rapid minimally invasive subsurface archaeological site prospection on Roti Island, Indonesia
SWOT satellite assessment for monitoring the extreme 2025 floods in Australia’s inland Channel Country
In early 2025 mainland Australia experienced one of the most extreme inland flooding events in the observational period. Extensive floodwaters gradually flowed southward toward Kati Thanda–Lake Eyre via the ‘Channel Country’, with the Cooper Creek basin being one of the most severely affected regions. Typically considered as a low-gradient dryland catchment, the Cooper recorded its highest-ever flood with water depths reaching 13.4 m in the more …
Geology and Paleoclimatology Research (10 works) · Geography (8 works) · Geology (8 works) · Holocene (6 works) · Paleontology (6 works) · Physical geography (6 works) · Archaeology (5 works) · Geological formations and processes (5 works) · Structural basin (5 works) · Archaeology and ancient environmental studies (4 works)