ORCID Profile
0000-0003-3384-8254
Current Organisations
University of Adelaide
,
University of Wollongong
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Aboriginal and Torres Strait Islander History | Sedimentology | Geomorphology and Regolith and Landscape Evolution | Physical Geography and Environmental Geoscience
Ecosystem Assessment and Management of Coastal and Estuarine Environments | Environmental Education and Awareness |
Publisher: Wiley
Date: 03-2002
Publisher: Wiley
Date: 30-04-2010
Publisher: Informa UK Limited
Date: 31-01-2022
Publisher: Elsevier BV
Date: 06-2002
Publisher: Informa UK Limited
Date: 05-1986
Publisher: Informa UK Limited
Date: 05-1985
Publisher: Informa UK Limited
Date: 03-07-2018
Publisher: CSIRO Publishing
Date: 1985
DOI: 10.1071/SR9850441
Abstract: Terrestrial landscapes have existed in parts of southern South Australia since the Carboniferous to Permian Gondwanaland glaciation. Widespread weathered zones and ferricrete horizons and crusts on present highland surfaces in the region have been ascribed by various workers to Mesozoic or early Tertiary weathering phases. A critical examination of field relationships, however, points instead to complex reworking and continuous weathering of relic landscapes since early Mesozoic times, leading to the intricate patterns of sediments and soils forming the present regolith. Ferricrete crusts sporadically distributed on the highland surfaces are interpreted dominantly as remnants of iron-impregnated sediments of ancient valleys or depressions. The great but variable thickness of kaolinized bedrock beneath the highland surfaces, regarded by other workers as the mottled and pallid zones of a 'laterite' profile, is the integrated product of leaching and weathering throughout the Mesozoic and Cainozoic and cannot be assigned to separate and distinct climatic events. The use of weathered landsurfaces and ferricretes as morphostratigraphic markers in such landscapes is questionable.
Publisher: Informa UK Limited
Date: 03-07-2016
Publisher: Informa UK Limited
Date: 2006
Publisher: Wiley
Date: 14-08-2007
Publisher: Informa UK Limited
Date: 08-1999
Publisher: Elsevier BV
Date: 02-2010
Publisher: Informa UK Limited
Date: 09-1990
Publisher: SAGE Publications
Date: 23-10-2009
Abstract: An elevated valley-fill peat bog (Wilson Bog) near Mount Lofty, South Australia, failed in November 2005 following a flooding event, and exposed representative sections of the sediment infill. Two distinct units were revealed: 2 m of coarse-grained, siliciclastic sand/gravel, overlain by 2 m of peat. A simple charcoal extraction technique based on floatation and skimming was developed to extract coarse charcoal from coarse-grained gravels to determine the palaeofire record at a proximal site of sedimentation. Optically stimulated luminescence (OSL) dating of basal sediments revealed a minimum age of deposition of 7.02 +0.50 —0.56 ka, while the oldest charcoal peak yielded a radiocarbon age of 6000—5740 cal. yr BP. The lower half of the siliciclastic unit contains three distinct charcoal peaks suggesting there were infrequent but intense fires associated with wetter conditions during the Holocene climatic optimum 8000—5000 years ago. The period from 4000 to 2000 cal. yr BP is characterised by more frequent charcoal peaks and higher background levels of charcoal, which is consistent with more regular but less intense fires during drier, cooler conditions. The sharp transition from siliciclastic sedimentation to peat formation began ~1200 cal. yr BP, which may relate to a return to wetter conditions. However, fire frequency appears to have increased in this time suggesting augmentation by anthropogenic or ENSO-related factors. Charcoal-rich layers in the siliciclastic unit are associated with poorly sorted, bimodal sediments with high proportions of clay, silt and gravel, which supports the hypothesis that there is an association between past fire events and rapid, coarse-grained, post-fire aggradation. By analogy with active colluvial aggradation following recent fires at nearby Mount Bold, it is evident that fire plays a significant role in hillslope destabilization and subsequent sediment movement, leading to rapid valley-fill aggradation — a chain of events to which we apply the term ‘pyrocolluviation’.
Publisher: Cambridge University Press (CUP)
Date: 05-2000
Abstract: In southeastern South Australia, the River Murray debouches through a coastal barrier separating euryhaline estuarine-lagoonal waters from the Southern Ocean. Depending upon the relative freshwater outflow of the river and ingress of the ocean, water salinity varies greatly within the lower estuary. Ammonia beccarii and Elphidium articulatum are euryhaline species of foraminifera that characterize the estuary and back-barrier Coorong Lagoon. The inner-shelf marine environment hosts an assemblage in which Discorbis dimidiatus, E. crispum, E. macelliforme, and various cibicidid species predominate. In cored sediments recovered from the shallow lower estuary, the relative abundance of A. beccarii + E. articulatum was compared with that of D. dimidiatus + E. crispum + E. macelliforme + other species. These data, and AMS radiocarbon ages determined for foraminifera and ostracods, provide evidence of a change from maximum oceanic influence (5255 ± 60 yr B.P.) to maximum estuarine influence (3605 ± 70 yr B.P.). Over this same time interval, sea level fell relatively by about 2 m. However, the event was also contemporaneous with falling water levels in several Victorian lakes, and it is thus attributed to onset of climatic aridity. Reduced precipitation in the River Murray catchment and reduced freshwater outflow enhanced development of the flood-tide delta and constriction of the mouth.
Publisher: Informa UK Limited
Date: 2002
Publisher: Informa UK Limited
Date: 24-02-2020
Publisher: Informa UK Limited
Date: 26-02-2023
Publisher: Elsevier BV
Date: 03-1987
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 03-2002
Publisher: Informa UK Limited
Date: 11-1984
Publisher: CSIRO Publishing
Date: 2001
DOI: 10.1071/SR99089
Abstract: In coastal sections at Hallett Cove and Sellicks Beach, south of Adelaide, and at Redbanks section on Kangaroo Island, the Brunhes/Matuyama polarity transition (780 ka) is identified in the strongly oxide-mottled Ochre Cove Formation. At all 3 sections, the Ochre Cove Formation is overlain by a calcareous grey-green aeolian clay, called Ngaltinga Clay, which in turn is overlain by calcareous sediments of the Taringa and Christies Beach Formations. The marked change from an oxide-dominated weathering regime to a carbonate-dominated weathering regime, estimated to have occurred at about 500–600 ka, is interpreted as a major arid shift in regional climates. Similar arid shifts are known from Lake Bungunnia in the Murray Basin and Lake Lefroy in southern Western Australia, where changes from lacustrine clays to evaporites and dune sediments are estimated to have occurred between 400 and 700 ka, and about 500 ka, respectively. An increase in aeolian dust accession in south-eastern Australia, consistent with increased aridity in the interior source area, occurred after 780 ka, and was probably coeval with increased dust input to Tasman Sea sediments since 350 ka. Between 600 and 900 ka, oxygen isotope fluctuations in deep-sea cores showed a pronounced change in frequency, from a 40 ka (obliquity dominated) to a 100 ka (eccentricity dominated) pattern. At the same time, glacial-interglacial litudes increased, with a marked enrichment of glacial d18O values consistent with larger continental based ice-sheets. Colder global temperatures, and lower sea levels during glacials, may have played a part in the mid Pleistocene arid shift recorded in southern Australia. Associated variations in the strength of the warm Leeuwin Current may also have affected regional rainfall patterns in southern Australia.
Publisher: Elsevier BV
Date: 10-2000
Publisher: Informa UK Limited
Date: 03-1976
Publisher: Coastal Education and Research Foundation
Date: 02-09-2015
Publisher: Elsevier BV
Date: 06-1999
Publisher: Elsevier BV
Date: 05-2003
Publisher: Wiley
Date: 04-1995
Publisher: Geological Society of London
Date: 2001
Abstract: The Coorong Coastal Plain in southeastern South Australia preserves a long Quaternary record of cool-water, temperate-carbonate sedimentation in the form of high wave energy, barrier shoreline deposits and associated back-barrier lagoon facies that formed during successive sea-level highstands. Whole-rock s les of bioclastic skeletal carbonate sand with subordinate quartz were collected from aeolian facies (modern and relict foredunes) of a Holocene embayment fill and from ten Pleistocene barriers across the coastal plain in a transect from Robe to Naracoorte. The extent of leucine racemization (total acid hydrolysate and free amino acids) in the Pleistocene skeletal carbonate sand (63–500 μm) increases monotonically with age and is consistently higher than for entire fossil molluscs from the same allostratigraphic units, reflecting the lengthy residence time for bioclasts in this high wave energy environment, and sediment recycling from the erosion of older barriers. The extent of racemization in the whole-rock s les conforms with a model of apparent parabolic racemization kinetics and the calculated ages largely agree with previously determined luminescence ages. Apart from a possible reinterpretation of the significance of the West Naracoorte Range, the coastal plain succession indicates that interglacial sea levels did not deviate by more than 6 m of present sea level for the Mid- and Late Pleistocene thus providing an important framework for quantifying ice volume during sea-level highstands and calibrating the oxygen isotope record.
Publisher: Informa UK Limited
Date: 07-2010
Publisher: Elsevier BV
Date: 04-2002
Publisher: Elsevier BV
Date: 03-2019
Publisher: Informa UK Limited
Date: 09-1997
Publisher: Informa UK Limited
Date: 08-1993
Publisher: Elsevier BV
Date: 05-2003
Publisher: Elsevier BV
Date: 12-2001
Publisher: Informa UK Limited
Date: 03-2010
Publisher: American Society of Civil Engineers
Date: 11-09-2000
Publisher: Informa UK Limited
Date: 31-03-2021
Publisher: Elsevier BV
Date: 04-2002
Start Date: 05-2022
End Date: 04-2025
Amount: $378,000.00
Funder: Australian Research Council
View Funded Activity