Academic literature on the topic 'Lake Bungunnia'

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Journal articles on the topic "Lake Bungunnia"

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Stephenson, A. E. "Lake Bungunnia — A Plio-Pleistocene megalake in southern Australia." Palaeogeography, Palaeoclimatology, Palaeoecology 57, no. 2-4 (December 1986): 137–56. http://dx.doi.org/10.1016/0031-0182(86)90011-8.

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Twidale, C. R., and J. A. Bourne. "Course of the lower River Murray in South Australia: effects of underprinting and neotectonics?" Proceedings of the Royal Society of Victoria 121, no. 2 (2009): 207. http://dx.doi.org/10.1071/rs09207.

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The change in direction of the River Murray from westerly to southerly at North West Bend has been attributed to faulting or warping, but no appropriate structure has been located in the country rock coincident with the river course. Yet the angularity and the straightness of major sectors argue structural control. The plan course of the Murray downstream from Morgan is attributed to underprinting from basement fractures following the Middle Miocene but prior to the Late Pliocene. Uplift of the Marmon Jabuk structure superimposed on the effects of underprinting accounts for major departures from the SSW trend downstream from North West Bend, as well as the impounding of Lake Bungunnia. The upper shallow section of the valley-in-valley form was shaped at a time of higher baselevel in the Middle-Late Tertiary. The lower section is the present Gorge. The valley floor was lowered probably by subterranean solution and flow followed by collapse of the cavern roofs. Regression of the River at times of lower sea level caused the breach of the Marmon Jabuk blockage and the draining of Lake Bungunnia.
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Snowball, Ian. "Drill cores from mega-paleo Lake Bungunnia: a continuous record of mid-Pleistocene Australian aridification." Quaternary International 279-280 (November 2012): 457. http://dx.doi.org/10.1016/j.quaint.2012.08.1511.

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Zhisheng, An, J. M. Bowler, N. D. Opdyke, P. G. Macumber, and J. B. Firman. "Palaeomagnetic stratigraphy of Lake Bungunnia: Plio-pleistocene precursor of aridity in the murray basin, Southeastern Australia." Palaeogeography, Palaeoclimatology, Palaeoecology 54, no. 1-4 (May 1986): 219–39. http://dx.doi.org/10.1016/0031-0182(86)90126-4.

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McLaren, S., M. W. Wallace, B. J. Pillans, S. J. Gallagher, J. A. Miranda, and M. T. Warne. "Revised stratigraphy of the Blanchetown Clay, Murray Basin: age constraints on the evolution of paleo Lake Bungunnia." Australian Journal of Earth Sciences 56, no. 2 (March 2009): 259–70. http://dx.doi.org/10.1080/08120090802547074.

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Cooper, S. J. B., M. Adams, and A. Labrinidis. "Phylogeography of the Australian dunnart Sminthopsis crassicaudata (Marsupialia : Dasyuridae)." Australian Journal of Zoology 48, no. 5 (2000): 461. http://dx.doi.org/10.1071/zo00014.

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Analyses of mitochondrial DNA (mtDNA) and allozymes are used to investigate the population genetic structure, phylogeography and systematics of the fat-tailed dunnart, Sminthopsis crassicaudata. Phylogenetic analyses of control region sequences reveal the presence of two major mtDNA haplotype clades. A survey of the distribution of the two clades using diagnostic restriction endonucleases shows that one clade is restricted to southeast Australia whereas the second clade occupies the remaining central to western range of S. crassicaudata. Allozyme electrophoresis also shows concordant patterns of population structure, with significant differences in allele frequency at three loci between populations in the southeast and northwest. Together, the mtDNA and allozyme data provide evidence that S. crassicaudata consists of two Evolutionarily Significant Units (ESUs). The distribution of each ESU is not concordant with the distribution of the subspecies of S. crassicaudata, and we propose that the current subspecies classification neither reflects the major genetic subdivisions present within S. crassicaudata nor would be appropriate for any future conservation management. The level of divergence between mtDNA clades (3.4%) is indicative of cladogenesis in the Pleistocene and reflects a long-term barrier to maternal gene flow between these two populations. One potential historical barrier was Lake Bungunnia, which persisted in the Murray basin over much of the Pleistocene.
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Pillans, Brad, and Robert Bourman. "Mid Pleistocene arid shift in southern Australia, dated by magnetostratigraphy." Soil Research 39, no. 1 (2001): 89. http://dx.doi.org/10.1071/sr99089.

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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 amplitudes 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.
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McLaren, Sandra, Malcolm W. Wallace, and Tess Reynolds. "The Late Pleistocene evolution of palaeo megalake Bungunnia, southeastern Australia: A sedimentary record of fluctuating lake dynamics, climate change and the formation of the modern Murray River." Palaeogeography, Palaeoclimatology, Palaeoecology 317-318 (February 2012): 114–27. http://dx.doi.org/10.1016/j.palaeo.2011.12.020.

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Dissertations / Theses on the topic "Lake Bungunnia"

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Klingner, Darren Mark. "Palaeoenvironmental reconstruction of ancient Lake Bungunnia, Murray Basin, Australia /." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09SB/09sbk657.pdf.

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White, Geoffrey Joseph. "Geomorphology and origin of sediments of the fresh water palaeolake-Lake Bungunnia, Murray Basin : environmental, hydrogeological and agricultural implications /." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09SB/09sbw583.pdf.

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Thomas, B. P. "Gypsum cements in Cenozoic sediments in the Murray Basin, South Australia: their age and origin." Thesis, 1999. http://hdl.handle.net/2440/119336.

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A maximum Pleistocene (~0.6 Ma) age has been assigned to surface and sub-surface gypsum cements occurring in the Norwest Bend Formation and Upper Morgan Limestone, in the western Murray Basin. The gypsum cements post date the draining of Lake Bungunnia and the formation of the Murray River Gorge. The chemical and morphological diversity exhibited by the gypsum forms indicates a variety of genetic processes. Three main gypsum facies can be distinguished by their structural fabrics, which are indicative of the environmental conditions in which they formed. (1) Bedded gypsum crusts (selenite) and gypsum nodules have fibrous to lenticular crystals and occur as discrete horizons along sections of the Murray River cliffs. (2) Massive crystalline gypsum contain poikilitic inclusions of elastic material, indicating they formed below the surface where long periods of stable brine conditions allowed for large crystal growth. (3) Aeolian seed gypsum dunes derived from the deflation of gypsum from modem playa lakes. Sulphur and Strontium isotopes, fluid inclusion studies, and geochemical analysis (XRD) and (XRF), were used to interpret the brine conditions under which the different gypsum facies formed. Fluid inclusion analysis was used to determine the palaeosalinity of the brines from which the gypsum precipitated. The melting temperatures of ice in fluid inclusions indicate that brine salinities and compositions were similar to brines derived from evaporated sea water. They also indicate that gypsum crusts formed from less saline water than selenite and gypsum nodules. The delta34S ratios of gypsum crusts are also close to seawater values (+17.9%0 to +20.2%0 CDT), indicating marine sulphate is the dominant source of sulphur. Strontium isotope data negate the possibility of derivation of the lacustrine "seawater like" brine chemistry, from either marine transgressions or weathering of connate salts from marine strata alone. Sulphur and Sr isotope ratios of the gypsum crusts indicate that gypsum was predominantly derived from the dissolution of the aeolian gypsum dunes by meteoric water influenced by sea spray. The demise of Lake Bungunnia indicated the onset of aridity in Southern Australia. The draining of the megalake may be responsible for the gypsum cements and the aeolian gypsum dunes from which they were derived.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1999
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