ORCID Profile
0000-0002-5593-2740
Current Organisation
University of Melbourne
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Geology | Other Stratigraphy (Incl. Sequence Stratigraphy) | Palaeoclimatology | Marine Geoscience | Geochemistry | Geochronology And Isotope Geochemistry | Sedimentology | Climatology (Incl. Palaeoclimatology) | Biostratigraphy | Geophysics | Volcanology | Atmospheric Sciences | Basin Analysis | Geology | Geotectonics | Groundwater Hydrology | Petroleum Geology | Geodynamics | Natural hazards | Microbial Genetics | Sedimentology | Simulation and Modelling | Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) | Palaeontology | Sedimentology |
Earth sciences | Expanding Knowledge in the Earth Sciences | Effects of Climate Change and Variability on Australia (excl. Social Impacts) | Oil and gas | Oil and gas | Oil and Gas Exploration | Other | Oil and gas | Biological sciences | Physical sciences | Climate change | Oil Shale and Tar Sands Exploration | Mineral Resources (excl. Energy Resources) not elsewhere classified | Land and water management |
Publisher: Springer Science and Business Media LLC
Date: 04-12-2019
DOI: 10.1038/S41598-019-54981-7
Abstract: Inorganic precipitation of aragonite is a common process within tropical carbonate environments. Across the Northwest Shelf of Australia (NWS) such precipitates were abundant in the late Pleistocene, whereas present-day sedimentation is dominated by calcitic bioclasts. This study presents sedimentological and geochemical analyses of core data retrieved from the upper 13 meters of IODP Site U1461 that provide a high-resolution sedimentary record of the last ~15 thousand years. Sediments that formed from 15 to 10.1 ka BP are aragonitic and characterised by small needles ( µm) and ooids. XRF elemental proxy data indicate that these sediments developed under arid conditions in which high marine alkalinity favoured carbonate precipitation. A pronounced change of XRF-proxy values around 10.1 ka BP indicates a transition to a more humid climate and elevated fluvial runoff. This climatic change coincides with a shelf-wide cessation of inorganic aragonite production and a switch to carbonate sedimentation dominated by skeletal calcite. High ocean water alkalinity due to an arid climate and low fluvial runoff therefore seems to be a prerequisite for the formation of shallow water aragonite-rich sediments on the NWS. These conditions are not necessarily synchronous to interglacial periods, but are linked to the regional hydrological cycle.
Publisher: Informa UK Limited
Date: 06-2003
Publisher: Informa UK Limited
Date: 10-2020
Publisher: Elsevier BV
Date: 09-2016
Publisher: Elsevier BV
Date: 08-2001
Publisher: Informa UK Limited
Date: 20-05-2021
Publisher: Elsevier BV
Date: 02-2007
Publisher: Elsevier BV
Date: 12-2012
Publisher: Elsevier BV
Date: 07-2012
Publisher: Elsevier BV
Date: 08-2016
Publisher: Copernicus GmbH
Date: 04-04-2019
DOI: 10.5194/CP-2019-35
Abstract: Abstract. Global climate cooled from the early Eocene hothouse (~ 52–50 Ma) to the latest Eocene (~ 34 Ma). At the same time, the tectonic evolution of the Southern Ocean was characterized by the opening and deepening of circum-Antarctic gateways, which affected both surface- and deep-ocean circulation. The Tasman Gateway played a key role in regulating ocean throughflow between Australia and Antarctica. Southern Ocean surface currents through and around the Tasman Gateway have left recognizable tracers in the spatiotemporal distribution of plankton fossils, including organic-walled dinoflagellate cysts. This spatiotemporal distribution depends on physico-chemical properties of the water masses in which these organisms thrived. The degree to which the geographic path of surface currents (primarily controlled by tectonism) or their physico-chemical properties (significantly impacted by climate) have controlled the composition of the fossil assemblages has, however, remained unclear. In fact, it is yet poorly understood to what extent oceanographic response as a whole was dictated by climate change, independent of tectonics-induced oceanographic changes that operate on longer time scales. To disentangle the effects of tectonism and climate in the southwest Pacific Ocean, we target a climatic deviation from the long-term Eocene cooling trend, a 500 thousand year long global warming phase termed the Middle Eocene Climatic Optimum (MECO ~ 40 Ma). The MECO warming is unrelated to regional tectonism, and thus provides a test case to investigate the oceans physiochemical response to climate change only. We reconstruct changes in surface-water circulation and temperature in and around the Tasman Gateway during the MECO through new palynological and organic geochemical records from the central Tasman Gateway (Ocean Drilling Program Site 1170), the Otway Basin (southeastern Australia) and the H den Section (New Zealand). Our results confirm that dinocyst communities track tectonically driven circulation patterns, yet the variability within these communities can be driven by superimposed temperature change. Together with published results from the east of the Tasman Gateway, our results suggest that as surface-ocean temperatures rose, the East Australian Current extended further southward during the peak of MECO warmth. Simultaneous with high sea-surface temperatures in the Tasman Gateway area, pollen assemblages indicate warm temperate rainforests with paratropical elements along the southeastern margin of Australia. Finally, based on new age constraints we suggest that a regional southeast Australian transgression might have been caused by sea-level rise during MECO.
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 2009
Publisher: Springer International Publishing
Date: 2016
Publisher: Elsevier BV
Date: 09-2018
Publisher: Informa UK Limited
Date: 03-2008
Publisher: Elsevier BV
Date: 03-2020
Publisher: Informa UK Limited
Date: 11-06-2020
Publisher: Elsevier BV
Date: 05-2021
Publisher: Copernicus GmbH
Date: 27-03-2022
DOI: 10.5194/EGUSPHERE-EGU22-1509
Abstract: & & International Ocean Discovery Program (IODP) conducted a series of expeditions between 2014 and 2016 that were designed to address the development of monsoon climate systems in Asia and Australia. Significant progress was made in recovering Neogene sections spanning the region from the Arabian Sea to the Japan Sea and south to western Australia. High recovery by advanced piston core (APC) technology has provided a host of semi-continuous sections that have been used to examine monsoonal evolution. Use of half APC was successful in s ling sand-rich sediment in Indian Ocean submarine fans. The records show that humidity and seasonality developed diachronously across the region, although most regions show drying since the middle Miocene and especially since ~4 Ma, likely linked to global cooling. The transition from C3 to C4 vegetation often accompanied the drying, but may be more linked to global cooling. Western Australia, and possibly southern China erge from the general trend in becoming wetter during the late Miocene, with the Australian monsoon being more affected by the Indonesian Throughflow, while the Asian Monsoon is tied more to the rising Himalaya in South Asia and to the Tibetan Plateau in East Asia. The monsoon shows sensitivity to orbital forcing, with many regions having a weaker summer monsoon during times of Northern Hemispheric Glaciation. Stronger monsoons are associated with faster continental erosion, but not weathering intensity, which either shows no trend or decreasing strength since the middle Miocene in Asia. Marine productivity proxies and terrestrial environmental proxies are often seen to erge. Future work on the almost unknown Paleogene is highlighted, as well as the potential of carbonate platforms as archives of paleoceanographic conditions.& &
Publisher: Springer Science and Business Media LLC
Date: 22-03-2018
Publisher: Elsevier BV
Date: 04-2006
Publisher: American Geophysical Union (AGU)
Date: 10-02-2009
DOI: 10.1029/2008PA001660
Publisher: JMIR Publications Inc.
Date: 02-03-2023
Abstract: he purpose of this present study was to conduct a scoping review to contribute to the understanding of the types and characteristics of online support groups (OSGs) for family caregivers. Over the last decade the number of OSGs increased exponentially, however there is not consensus on what factors or characteristics of OSG contribute to the development of social support within these groups or what types of OSG are available to family caregivers. Following the Prisma-ScR guidelines, 19 studies were included in the review. The findings explore (a) the social support groups are online for adult family caregivers (b) the communication medium and characteristics of these OSGs and (c) the psychosocial or other factors that made OSG successful or unsuccessful for participants. The analysis process generated two overarching categories of safe communication and engagement described groups with a focus on similar others and shared life experience shared in a non-judgemental space overseen by trained peer or professional facilitators. A general recommendation for practitioners is that it appears important to build in active moderation and multi-faceted structures of support to meet different levels of caregiver needs and ability to engage.
Publisher: Geological Society of London
Date: 1996
Publisher: Informa UK Limited
Date: 16-03-2016
Publisher: Informa UK Limited
Date: 08-2003
Publisher: Elsevier BV
Date: 09-1998
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 2020
Publisher: Wiley
Date: 08-2004
Publisher: Elsevier BV
Date: 09-2019
Publisher: Informa UK Limited
Date: 06-2006
Publisher: American Geophysical Union (AGU)
Date: 05-03-2013
DOI: 10.1002/2013EO100007
Publisher: Informa UK Limited
Date: 12-2015
Publisher: Informa UK Limited
Date: 03-2011
Publisher: Informa UK Limited
Date: 12-2008
Publisher: American Geophysical Union (AGU)
Date: 14-02-2012
DOI: 10.1029/2012EO070011
Publisher: Informa UK Limited
Date: 02-2011
Publisher: American Geophysical Union (AGU)
Date: 10-2020
DOI: 10.1029/2020PA003872
Abstract: Ocean gateways facilitate circulation between ocean basins, thereby impacting global climate. The Indonesian Gateway transports water from the Pacific to the Indian Ocean via the Indonesian Throughflow (ITF) and drives the strength and intensity of the modern Leeuwin Current, which carries warm equatorial waters along the western coast of Australia to higher latitudes. Therefore, ITF dynamics are a vital component of global thermohaline circulation. Plio‐Pleistocene changes in ITF behavior and Leeuwin Current intensity remain poorly constrained due to a lack of sedimentary records from regions under its influence. Here, organic geochemical proxies are used to reconstruct sea surface temperatures on the northwest Australian shelf at IODP Site U1463, downstream of the ITF outlet and under the influence of the Leeuwin Current. Our records, based on TEX 86 and the long‐chain diol index, provide insight into past ITF variability (3.5–1.5 Ma) and confirm that sea surface temperature exerted a control on Australian continental hydroclimate. A significant TEX 86 cooling of ~5°C occurs within the mid‐Pliocene Warm Period (3.3–3.1 Ma) suggesting that this interval was characterized by SST fluctuations at Site U1463. A major feature of both the TEX 86 and long‐chain diol index records is a strong cooling from ~1.7 to 1.5 Ma. We suggest that this event reflects a reduction in Leeuwin Current intensity due to a major step in ongoing ITF constriction, accompanied by a switch from South to North Pacific source waters entering the ITF inlet. Our new data suggest that an additional ITF constriction event may have occurred in the Pleistocene.
Publisher: Elsevier BV
Date: 02-2008
Publisher: American Geophysical Union (AGU)
Date: 24-11-2021
DOI: 10.1029/2021PA004261
Abstract: The East China Sea (ECS) seasonally receives a high organic input due to the terrestrial organic matter influx, which is controlled by the East Asian Summer Monsoon (EASM), and the increased productivity driven by upwelling of the subsurface Kuroshio Current (KC). Changes in benthic foraminiferal assemblage composition in combination with paleoceanographic proxy data (CaCO 3 (%), TOC (%), δ 13 C pf , and δ 18 O bf ) are used to reconstruct bottom water oxygenation and organic export flux variability over the last 400 kyr in the ECS. Multivariate analyses of benthic foraminiferal census data identified six biofacies characteristic of varying environmental conditions. These results suggest that enhanced EASM precipitation and KC upwelling directly influenced organic export flux and bottom water oxygen content in the ECS. The ECS bottom water was suboxic during Marine Isotope Stage (MIS) 11 to 8 suboxic to dysoxic between MIS 7 and 6, strongly dysoxic between mid‐MIS 5 and 4, and exhibited high variability between MIS 3 and 1. Spectral analysis of relative abundances of representative genera Quinqueloculina (oxic), Bulimina (suboxic), and Globobulimina (dysoxic) reveals a robust 23 kyr signal, which we attribute to precessionally‐paced changes in surface productivity and bottom water oxygenation related to KC variability over the past 400 kyr.
Publisher: Copernicus GmbH
Date: 29-04-2014
Abstract: Abstract. A major International Ocean Discovery Program (IODP) workshop covering scientific ocean drilling in the southwest Pacific Ocean was held in Sydney, Australia, in late 2012. The workshop covered all fields of geoscience, and drilling targets in the area from the Equator to Antarctica. High-quality contributions and a positive and cooperative atmosphere ensured its success. The four science themes of the new IODP science plan were addressed. An additional resource-oriented theme considered possible co-investment opportunities involving IODP vessels. As a result of the workshop, existing proposals were revised and new ones written for the April 2013 deadline. Many of the proposals are broad and multidisciplinary in nature, hence broadening the scientific knowledge that can be produced by using the IODP infrastructure. This report briefly outlines the workshop and the related drilling plans.
Publisher: Society for Sedimentary Geology
Date: 03-2002
DOI: 10.1306/082701720288
Publisher: Elsevier BV
Date: 02-2000
Publisher: Informa UK Limited
Date: 19-02-2017
Publisher: Elsevier BV
Date: 05-2003
Publisher: American Geophysical Union (AGU)
Date: 07-07-2017
DOI: 10.1002/2017GL072977
Publisher: Informa UK Limited
Date: 05-07-2016
Publisher: Springer Science and Business Media LLC
Date: 13-02-2019
Publisher: American Geophysical Union (AGU)
Date: 03-2023
DOI: 10.1029/2022PA004529
Abstract: To assess zonal temperature and biogeographical patterns in the Southern Ocean during the Paleogene, we present new multi‐proxy air‐ and sea‐surface temperature data for the latest Paleocene (∼57–56 Ma) and the Paleocene‐Eocene Thermal Maximum (PETM ∼56 Ma) from the northern margin of the Australo‐Antarctic Gulf (AAG). The various proxy data sets document the well‐known late Paleocene warming and, superimposed, two transient late Paleocene pre‐cursor warming events, hundreds of kyr prior to the PETM. Remarkably, temperature reconstructions for the AAG and southwest Pacific during the latest Paleocene, PETM and Early Eocene Climatic Optimum (∼53–49 Ma) show similar trends as well as similar absolute temperatures east and west of the closed Tasmanian Gateway. Our data imply that the exceptional warmth as recorded by previous studies for the southwest Pacific extended westward into the AAG. This contrasts with modeling‐derived circulation and temperature patterns. We suggest that simulations of ocean circulation underestimate heat transport in the southwest Pacific due to insufficient resolution, not allowing for mesoscale eddy‐related heat transport. We argue for a systematic approach to tackle model and proxy biases that may occur in marginal marine settings and non‐analog high‐latitude climates to assess the temperature reconstructions.
Publisher: American Geophysical Union (AGU)
Date: 03-2021
DOI: 10.1029/2020GC009418
Publisher: Copernicus GmbH
Date: 12-1999
DOI: 10.1144/JM.18.2.143
Abstract: Abstract. This multidisciplinary study integrates fades studies and foraminiferal analyses to assess the palaeoenvironmental evolution of an Oligocene to Miocene cool-water carbonate succession in the Otway Basin, southeastern Australia. The cool-water carbonate succession in the Otway Basin records signals relating to the evolution of the Southern Ocean throughout the Cenozoic. The strata are correlated with the relative coastal onlap curve of Haq et al. (1988) and several sequences can be identified in three formations. The Early Oligocene Narrawaturk Formation (TA 4.5) comprises near the base high-energy, inner shelf biofacies (lowstand systems tracts) and up-section to lower energy mid- to outer shelf marls (TST and maximum flooding surfaces) with storm events and/or minor shallowing intervals. Foraminiferal reworking and post-depositional dolomitization occurs at the top of this unit. The Late Oligocene Clifton Formation (TB 1.1 and TB 1.2.) was deposited in a relatively high-energy inner to mid-shelf environment. The base of this unit preserves evidence of a shift in biofacies that correlates to a major sea-level fall at the Mid/Late Oligocene boundary coincident with a major ice advance in Antarctica, and correlates with other Mid-Oligocene unconformities world-wide. The Late Oligocene Gellibrand Marl Formation (TB 1.2 and TB 1.3) began with low-energy outer shelf cherty marly biofacies (TST and MFS) followed by mid- to outer shelf calcisiltites (HST). High-energy mid- to outer shelf conditions were established after an hiatus in the Late Oligocene. A relative sea-level rise at the base of the Lower Miocene (TB 1.5 and TB2.1) led to the deposition of lower energy outer shelf cherty marls.Four biofacies with distinctive foraminiferal faunas are distinguished. (1) Grey mid- to outer shelf low-energy bryozoal marls with infaunal foraminifera and high plankton values. Two foraminiferal assemblages occur: lagenids and Uvigerina are common in the Narrawaturk marls, whereas bolivinids and Astrononion occur in the Gellibrand marls. The faunal variation in the marls may relate to changes in nutrient supply, anoxia, the presence or absence of organic material and/or changes in depth. (2) Chalky packstone facies with a high epifaunal content were deposited in oligotrophic inner to mid-shelf palaeoenvironments subject to intermittent reworking. (3) Bryozoan-poor inner to outer shelf foraminiferal packstones and grainstones facies enriched in epifaunal forms. (4) Well-sorted coarsegrained regular echinoid and bryozoan-rich packstones to grainstones. Infaunal taxa are absent in this facies, where most preserved foraminifera are robust spherical to discoidal forms. The facies were deposited in inner to mid-shelf palaeoenvironments where reworking by intense wave action (either above normal wavebase or by storms) winnowed out all smaller foraminifera.The stratigraphic and palaeoenvironmental utility of the Cenozoic foraminifera studied is improved greatly by facies analyses. Similar integrated studies will lead to better correlations and palaeoenvironmental interpretations of southeastern Australian sequences and equivalent successions in the southern hemisphere.
Publisher: Informa UK Limited
Date: 06-2002
Publisher: Elsevier BV
Date: 11-2014
Publisher: Elsevier BV
Date: 05-2018
Publisher: American Geophysical Union (AGU)
Date: 09-2020
DOI: 10.1029/2019TC005988
Publisher: Elsevier BV
Date: 02-2012
Publisher: Informa UK Limited
Date: 03-2009
Publisher: Elsevier BV
Date: 04-2015
Publisher: American Geophysical Union (AGU)
Date: 04-2019
DOI: 10.1029/2018PA003512
Publisher: Copernicus GmbH
Date: 07-2003
DOI: 10.1144/JM.22.1.63
Abstract: Abstract. This study describes the foraminifera and facies of a large submarine canyon: the Bass Canyon, in the Gippsland Basin off the coast of southeastern Australia. The study incorporates facies analyses and interpretations of three types of foraminiferal distributional data: forms alive at time of collection, recently dead forms and relict forms. Four principle biofacies types occur: (1) middle shelf to shelf-break carbonate sand (2) oxic upper to middle bathyal carbonate sand and gravel, with abundant bryozoans (3) reduced oxic middle bathyal carbonate sand and gravel and (4) lower bathyal oxic muddy sand to Globigerina Ooze.Correspondence Analysis of the 61 parameters (percentage abundance of foraminifera and % carbonate) in 36 s les yielded a clear depth-related pattern, although other related parameters such as dissolved oxygen and substrate also exert control on the foraminiferal assemblages.Relict foraminifera are restricted to shelfal depths, shallower than 145 m. This pattern is similar to other shelf regions in Australia, where shelf areas were exposed during the Last Glacial Maximum, reworking shelf facies shallower than 150 m. The distribution of living foraminifera is similar to the distribution of the total assemblage, suggesting that the region has not been significantly mixed by wave, slump or bioturbation processes.The majority of the modern Bass Canyon foraminiferal assemblages are cosmopolitan species, with few (semi-)endemic taxa that are mostly restricted to the shelf. These modern deeper-living forms are more conservative since they evolved in relatively lower stress eutrophic environments than their shallower oligotrophic dwelling contemporaries.The foraminiferal and facies analogues of this study on the Bass Canyon may be used as a modern palaeoenvironmental analyses of the Gippsland and Otway Neogene sedimentary deep-sea successions. This will lead ultimately to a better understanding of the evolution of the basins in southeastern Australia, in an area influenced by the Southern Ocean during the Cenozoic.
Publisher: Public Library of Science (PLoS)
Date: 26-04-2016
Publisher: Elsevier BV
Date: 05-2011
Publisher: Wiley
Date: 2006
DOI: 10.1002/GJ.1033
Publisher: International Ocean Discovery Program
Date: 07-08-2014
Publisher: Geological Society of America
Date: 15-04-2019
DOI: 10.1130/G45915.1
Publisher: Informa UK Limited
Date: 08-2007
Publisher: Elsevier BV
Date: 04-2007
Publisher: Copernicus GmbH
Date: 13-02-2018
Abstract: Abstract. Detailed, stratigraphically well-constrained environmental reconstructions are available for Paleocene and Eocene strata at a range of sites in the southwest Pacific Ocean (New Zealand and East Tasman Plateau ETP) and Integrated Ocean Discovery Program (IODP) Site U1356 in the south of the Australo-Antarctic Gulf (AAG). These reconstructions have revealed a large discrepancy between temperature proxy data and climate models in this region, suggesting a crucial error in model, proxy data or both. To resolve the origin of this discrepancy, detailed reconstructions are needed from both sides of the Tasmanian Gateway. Paleocene–Eocene sedimentary archives from the west of the Tasmanian Gateway have unfortunately remained scarce (only IODP Site U1356), and no well-dated successions are available for the northern sector of the AAG. Here we present new stratigraphic data for upper Paleocene and lower Eocene strata from the Otway Basin, southeast Australia, on the (north)west side of the Tasmanian Gateway. We analyzed sediments recovered from exploration drilling (Latrobe-1 drill core) and outcrop s ling (Point Margaret) and performed high-resolution carbon isotope geochemistry of bulk organic matter and dinoflagellate cyst (dinocyst) and pollen biostratigraphy on sediments from the regional lithostratigraphic units, including the Pebble Point Formation, Pember Mudstone and Dilwyn Formation. Pollen and dinocyst assemblages are assigned to previously established Australian pollen and dinocyst zonations and tied to available zonations for the SW Pacific. Based on our dinocyst stratigraphy and previously published planktic foraminifer biostratigraphy, the Pebble Point Formation at Point Margaret is dated to the latest Paleocene. The globally synchronous negative carbon isotope excursion that marks the Paleocene–Eocene boundary is identified within the top part of the Pember Mudstone in the Latrobe-1 borehole and at Point Margaret. However, the high abundances of the dinocyst Apectodinium prior to this negative carbon isotope excursion prohibit a direct correlation of this regional bio-event with the quasi-global Apectodinium acme at the Paleocene–Eocene Thermal Maximum (PETM 56 Ma). Therefore, the first occurrence of the pollen species Spinizonocolpites prominatus and the dinocyst species Florentinia reichartii are here designated as regional markers for the PETM. In the Latrobe-1 drill core, dinocyst biostratigraphy further indicates that the early Eocene (∼ 56–51 Ma) sediments are truncated by a ∼ 10 Myr long hiatus overlain by middle Eocene (∼ 40 Ma) strata. These sedimentary archives from southeast Australia may prove key in resolving the model–data discrepancy in this region, and the new stratigraphic data presented here allow for detailed comparisons between paleoclimate records on both sides of the Tasmanian Gateway.
Publisher: Elsevier BV
Date: 08-2009
Publisher: Informa UK Limited
Date: 08-01-2019
Publisher: Informa UK Limited
Date: 06-2001
Publisher: American Geophysical Union (AGU)
Date: 03-2017
DOI: 10.1002/2016GC006715
Publisher: Informa UK Limited
Date: 29-11-2021
Publisher: Copernicus GmbH
Date: 12-2001
DOI: 10.1144/JM.20.2.127
Abstract: Abstract. This study describes the foraminiferal biofacies of a temperate stenohaline shelf and associated euryhaline marine lakes of Gippsland in southeast Australia. The study incorporates facies analyses and interpretations of three types of foraminiferal distributional data: forms alive at the time of collection, recently dead forms and relict forms. Four principal biofacies types occur: (1) the euryhaline marine Gippsland Lakes silts and sands (2) inner shelf medium to coarse quartz-rich sands and bioclastic silty sands (3) medium shelf bryozoan-rich bioclastic silt and silty sand (4) outer shelf bryozoan- and plankton-rich silts and fine sands.The euryhaline marine Gippsland Lakes silts and sands contain abundant Ammonia beccarii and Eggerella, with minor Quinqueloculina, Elphidium and Discorbinella. The Gippsland inner shelf biofacies (0–50 m depths) consists of medium to coarse quartz-rich sands and bioclastic silty sand. Abundant living, relict and recently dead miliolids occur in the inner shelf with rare planktonic forms. Common planktonic foraminifera, with Cibicides, Parrellina, Elphidium and Lenticulina and relict forms occur in the bryozoan-rich bioclastic silt and silty sand of the Gippsland middle shelf (50–100 m depth). Bryozoan and plankton-rich silts and fine sand occur in the outer shelf to upper slope facies (100–300 m) below swell wave base on the Gippsland Shelf. A erse fauna with common textulariids, Uvigerina, Bulimina, Anomalinoides and Astrononion and rare relict forms, occurs in this biofacies. Planktonic foraminifera and Uvigerina are most abundant at the shelf break due to local upwelling at the head of the Bass Canyon.Estimates of faunal production rates from live/dead ratios and full assemblage data suggest that the fauna of the Gippsland Shelf has not been significantly reworked by wave and/or bioturbation processes. Most relict foraminifera occur in the inner shelf, with minor relict forms in the middle to outer shelf. This pattern is similar to other shelf regions in Australia, where shelf areas were exposed during Pleistocene lowstand times, principally reworking pre-existing inner to middle shelf faunas. Correspondence analyses of the foraminiferal data yield a clear depth-related distribution of the faunal assemblage data. Most of the modern Gippsland Shelf fauna are cosmopolitan species and nearly a third are (semi-)endemic taxa suitable for regional palaeo-environmental studies. From biostratigraphic studies it is clear that the modern Gippsland foraminiferal assemblage evolved since Early Miocene times, with most elements present by the Late Miocene. Hence, the Recent Gippsland Shelf foraminiferal biofacies distribution is a good analogue for Neogene palaeo-environmental studies in the region. The longer ranging pre-Miocene mixture of epifaunal and infaunal taxa are deeper shelf cosmopolitan forms and are inferred to be more conservative since they evolved in relatively lower stress environments, typifying mesotrophic to eutrophic conditions compared to inner shelf epifaunal forms with ecological niches markedly affected by sea-level and temperature fluctuations in zones of constant wave action, in oligotrophic environments.The foraminiferal and facies analogues of this study on the Gippsland Shelf can be used for palaeo-environmental analyses of the Gippsland and Otway Neogene sedimentary successions. Such improvements will lead ultimately to a better understanding of the evolution of the neritic realm in southeastern Australia, an area facing the evolving Southern Ocean during the Cenozoic.
Publisher: Elsevier BV
Date: 11-2000
Publisher: Wiley
Date: 06-04-2018
Publisher: Wiley
Date: 10-2001
Publisher: Wiley
Date: 11-09-2013
DOI: 10.1002/JOC.3587
Publisher: Cambridge University Press
Date: 23-01-2014
Publisher: Elsevier BV
Date: 10-2018
Publisher: American Association for the Advancement of Science (AAAS)
Date: 05-05-2017
Abstract: Sediments from Western Australia show how westerly winds made the southwest wetter during the Miocene (18 to 6 million years ago).
Publisher: Wiley
Date: 22-10-2021
DOI: 10.1111/SED.12948
Abstract: The continental shelf of Northwest Australia hosts an extensive tropical carbonate r that forms an important template for the interpretation of similar systems in the sedimentary record. Yet, little is known about its development from the middle to late Quaternary, a period of high frequency glacioeustatic changes in sea‐level and climate. This research describes core and seismic‐reflection data from a mid‐r to outer r transect at the Northwest Shelf. Core material includes the upper 70 m of International Ocean Discovery Program Site U1461 (Expedition 356), which covers the last 500 kyr. During arid glacials, sedimentation is characterized by inorganically precipitated carbonates, including aragonite‐needle mud and ooids. Ooids developed under shallow marine conditions on small‐scale flat‐topped platforms. Seismic and sedimentological evidence indicates that these platforms developed locally on top of the present‐day mid‐r and were typically only active during a single glacial period. Aragonite‐needle mud precipitated (inorganically) in shallow‐water areas. Much of these fine sediments were subsequently exported into deeper water where they mixed with pelagic carbonates. Humid interglacials are generally characterized by reduced sedimentation across the Northwest Shelf of Australia, resulting in the amalgamation of glacial lowstand deposits. Yet, substantial amounts of skeletal carbonates were deposited at the studied location during the Holocene and Marine Isotope Stage 11. These sediment accumulations are interpreted as a local feature caused by a decline in current energy. The study presented highlights a r system where climate is as important as sea‐level in controlling carbonate deposition.
Publisher: Wiley
Date: 10-2001
Publisher: Elsevier BV
Date: 09-2013
Publisher: American Geophysical Union (AGU)
Date: 25-01-2013
DOI: 10.1029/2012PA002326
Publisher: Informa UK Limited
Date: 06-2009
Publisher: American Geophysical Union (AGU)
Date: 07-2018
DOI: 10.1029/2018PA003331
Publisher: Wiley
Date: 11-09-2020
Publisher: Informa UK Limited
Date: 04-2003
Publisher: Copernicus GmbH
Date: 09-2020
Abstract: Abstract. Global climate cooled from the early Eocene hothouse (∼52–50 Ma) to the latest Eocene (∼34 Ma). At the same time, the tectonic evolution of the Southern Ocean was characterized by the opening and deepening of circum-Antarctic gateways, which affected both surface- and deep-ocean circulation. The Tasmanian Gateway played a key role in regulating ocean throughflow between Australia and Antarctica. Southern Ocean surface currents through and around the Tasmanian Gateway have left recognizable tracers in the spatiotemporal distribution of plankton fossils, including organic-walled dinoflagellate cysts. This spatiotemporal distribution depends on both the physicochemical properties of the water masses and the path of surface-ocean currents. The extent to which climate and tectonics have influenced the distribution and composition of surface currents and thus fossil assemblages has, however, remained unclear. In particular, the contribution of climate change to oceanographic changes, superimposed on long-term and gradual changes induced by tectonics, is still poorly understood. To disentangle the effects of tectonism and climate in the southwest Pacific Ocean, we target a climatic deviation from the long-term Eocene cooling trend: the Middle Eocene Climatic Optimum (MECO ∼40 Ma). This 500 kyr phase of global warming was unrelated to regional tectonism, and thus provides a test case to investigate the ocean's physicochemical response to climate change alone. We reconstruct changes in surface-water circulation and temperature in and around the Tasmanian Gateway during the MECO through new palynological and organic geochemical records from the central Tasmanian Gateway (Ocean Drilling Program Site 1170), the Otway Basin (southeastern Australia), and the H den Beach section (New Zealand). Our results confirm that dinocyst communities track specific surface-ocean currents, yet the variability within the communities can be driven by superimposed temperature change. Together with published results from the east of the Tasmanian Gateway, our new results suggest a shift in surface-ocean circulation during the peak of MECO warmth. Simultaneous with high sea-surface temperatures in the Tasmanian Gateway area, pollen assemblages indicate warm temperate rainforests with paratropical elements along the southeastern margin of Australia. Finally, based on new age constraints, we suggest that a regional southeast Australian transgression might have been coincident with the MECO.
Publisher: Springer Science and Business Media LLC
Date: 27-06-2015
Publisher: Elsevier BV
Date: 09-2018
Publisher: Copernicus GmbH
Date: 28-10-2022
DOI: 10.5194/SD-31-1-2022
Abstract: Abstract. The International Ocean Discovery Program (IODP) conducted a series of expeditions between 2013 and 2016 that were designed to address the development of monsoon climate systems in Asia and Australia. Significant progress was made in recovering Neogene sections spanning the region from the Arabian Sea to the Sea of Japan and southward to western Australia. High recovery by advanced piston corer (APC) has provided a host of semi-continuous sections that have been used to examine monsoonal evolution. Use of the half-length APC was successful in s ling sand-rich sediment in Indian Ocean submarine fans. The records show that humidity and seasonality developed diachronously across the region, although most regions show drying since the middle Miocene and especially since ∼ 4 Ma, likely linked to global cooling. A transition from C3 to C4 vegetation often accompanied the drying but may be more linked to global cooling. Western Australia and possibly southern China erge from the general trend in becoming wetter during the late Miocene, with the Australian monsoon being more affected by the Indonesian Throughflow, while the Asian monsoon is tied more to the rising Himalaya in South Asia and to the Tibetan Plateau in East Asia. The monsoon shows sensitivity to orbital forcing, with many regions having a weaker summer monsoon during times of northern hemispheric Glaciation. Stronger monsoons are associated with faster continental erosion but not weathering intensity, which either shows no trend or a decreasing strength since the middle Miocene in Asia. Marine productivity proxies and terrestrial chemical weathering, erosion, and vegetation proxies are often seen to erge. Future work on the almost unknown Paleogene is needed, as well as the potential of carbonate platforms as archives of paleoceanographic conditions.
Publisher: Cambridge University Press (CUP)
Date: 03-1990
DOI: 10.1017/S0016756800013868
Abstract: A highly xenolithic dolerite dyke is described which contains a large number of spinel lherzolite xenoliths. The petrology of the dolerite and the xenolith suite is described and electron probe analyses presented for the mineral phases in one of the spinel lherzolite xenoliths. The dyke geochemistry is consistent with a Permo-Carboniferous age.
Publisher: No publisher found
Date: 2021
Publisher: Elsevier BV
Date: 08-2005
Publisher: Cushman Foundation for Foraminiferal Research
Date: 10-2004
DOI: 10.2113/34.4.294
Publisher: Copernicus GmbH
Date: 04-04-2019
Publisher: The Royal Society
Date: 08-02-2017
Abstract: Living baleen whales (mysticetes) produce and hear the lowest-frequency (infrasonic) sounds among mammals. There is currently debate over whether the ancestor of crown cetaceans (Neoceti) was able to detect low frequencies. However, the lack of information on the most archaic fossil mysticetes has prevented us from determining the earliest evolution of their extreme acoustic biology. Here, we report the first anatomical analyses and frequency range estimation of the inner ear in Oligocene (34–23 Ma) fossils of archaic toothed mysticetes from Australia and the USA. The cochlear anatomy of these small fossil mysticetes resembles basilosaurid archaeocetes, but is also similar to that of today's baleen whales, indicating that even the earliest mysticetes detected low-frequency sounds, and lacked ultrasonic hearing and echolocation. This suggests that, in contrast to recent research, the plesiomorphic hearing condition for Neoceti was low frequency, which was retained by toothed mysticetes, and the high-frequency hearing of odontocetes is derived. Therefore, the low-frequency hearing of baleen whales has remained relatively unchanged over the last approximately 34 Myr, being present before the evolution of other signature mysticete traits, including filter feeding, baleen and giant body size.
Publisher: The Oceanography Society
Date: 03-2019
Publisher: Geological Society of America
Date: 25-08-2020
DOI: 10.1130/G47343.1
Abstract: Current knowledge of terrestrial ecosystem response to the Paleocene-Eocene Thermal Maximum (PETM ca. 56 Ma) is largely based on the midlatitudes of the Northern Hemisphere. To more fully reconstruct global terrestrial ecosystem response to the PETM, we generated vegetation and biomarker proxy records from an outcrop section on the southern coast of Australia (∼60°S paleolatitude). We documented a rapid, massive, and sustained vegetation turnover as a response to regional PETM warming of ∼1–4 °C, abruptly transitioning from a warm temperate to a meso-megathermal rain forest similar to that of present-day northeastern Queensland, Australia. The onset of this vegetation change preceded the characteristic PETM carbon-isotope excursion (CIE) by several thousand years. The reconstructed ecosystem change is much stronger than in other Southern Hemisphere records, highlighting the need for consideration of regional paleoceanographic, paleogeographic, and biogeographic characteristics to fully understand the global terrestrial ecosystem response to PETM climate forcing.
Publisher: Wiley
Date: 29-07-2021
Publisher: Wiley
Date: 26-03-2021
Publisher: Elsevier BV
Date: 04-2000
Publisher: SEPM (Society for Sedimentary Geology)
Date: 1997
Publisher: Springer Science and Business Media LLC
Date: 26-03-2018
Start Date: 2002
End Date: 2004
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 2007
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 2007
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 2005
Funder: Australian Research Council
View Funded ActivityStart Date: 2016
End Date: 2020
Funder: Australian Research Council
View Funded ActivityStart Date: 2009
End Date: 2011
Funder: Australian Research Council
View Funded ActivityStart Date: 2017
End Date: 2019
Funder: Japan Society for the Promotion of Science
View Funded ActivityStart Date: 2002
End Date: 2002
Funder: Australian Research Council
View Funded ActivityStart Date: 2021
End Date: 2023
Funder: Australian Research Council
View Funded ActivityStart Date: 2014
End Date: 2015
Funder: Australian Research Council
View Funded ActivityStart Date: 2002
End Date: 12-2005
Amount: $190,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 12-2008
Amount: $240,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 12-2005
Amount: $127,042.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2013
End Date: 12-2016
Amount: $330,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2001
End Date: 12-2002
Amount: $100,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2005
End Date: 12-2008
Amount: $285,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 10-2023
End Date: 10-2026
Amount: $475,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 05-2009
End Date: 09-2012
Amount: $220,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2016
End Date: 12-2020
Amount: $10,000,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 08-2021
End Date: 08-2023
Amount: $3,000,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2015
End Date: 03-2021
Amount: $2,748,358.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2014
End Date: 12-2016
Amount: $3,600,000.00
Funder: Australian Research Council
View Funded Activity