Late Neogene strandlines of southern Victoria: a unique record of eustasy and tectonics in southeast Australia

Wallace, Malcolm W.; Dickinson, Julie A.; Moore, David; Sandiford, Mike

doi:10.1080/08120090500139455

Cited by 56 publications

(58 citation statements)

References 19 publications

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“…However, only the Cameron Inlet assemblage is approximately contemporaneous with the Portland Pliocene assemblage (about 2.5-4.8 Ma), the Cameron Inlet Formation being late Early to Late Pliocene (about 2.0-4.0 Ma; Fitzgerald, 2004b and references therein). The Beaumaris Local Fauna spans the Miocene-Pliocene boundary, with an age range for the Black Rock Sandstone of about 4.5-5.8 Ma (Dickinson et al, 2002;Wallace et al, 2005). The Grange Burn assemblage is perhaps slightly younger than the Beaumaris Local Fauna, with the Grange Burn Formation being Early Pliocene (>4.35-5.3 Ma) (Dickinson et al, 2002;Fitzgerald, 2004;Wallace et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

“…The Beaumaris Local Fauna spans the Miocene-Pliocene boundary, with an age range for the Black Rock Sandstone of about 4.5-5.8 Ma (Dickinson et al, 2002;Wallace et al, 2005). The Grange Burn assemblage is perhaps slightly younger than the Beaumaris Local Fauna, with the Grange Burn Formation being Early Pliocene (>4.35-5.3 Ma) (Dickinson et al, 2002;Fitzgerald, 2004;Wallace et al, 2005). Both the Beaumaris Local Fauna and the Grange Burn assemblage are (at least in part) phosphatic nodule bed deposits.…”

Section: Resultsmentioning

confidence: 99%

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Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Fitzgerald¹

2005

MMV

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Fitzgerald¹

2005

MMV

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“…13 and 14): Eocene-Pliocene in the Nullarbor (Paine et al, 2004;Wallace et al, 2005) and in southern Patagonia, Argentina (del Rio et al, 2013). In the sense they may record a single process of formation, the existence of those long-lasting sequences (i.e.…”

Section: The Upper Part Of the Sequences: Lower Pleistocene-eocenementioning

confidence: 99%

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Pedoja

Husson

Johnson

et al. 2014

Earth-Science Reviews

165

195

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. Many coasts feature sequences of Quaternary and Neogene shorelines that are shaped by a combination of sealevel oscillations and tectonics. We compiled a global synthesis of sea-level changes for the following highstands: MIS 1, MIS 3, MIS 5e and MIS 11. Also, we date the apparent onset of sequences of paleoshorelines either from published data or tentatively extrapolating an age for the uppermost, purported oldest shoreline in each sequence. Including the most documented MIS 5e benchmark, we identify 926 sequences out of which 185 also feature Holocene shorelines. Six areas are identified where elevations of the MIS 3 shorelines are known, and 31 feature elevation data for MIS 11 shorelines. Genetic relationships to regional geodynamics are further explored based on the elevations of the MIS 5e benchmark. Mean apparent uplift rates range from 0.01 ± 0.01 mm/yr (hotspots) to 1.47 ± 0.08 mm/yr (continental collision). Passive margins appear as ubiquitously uplifting, while tectonic segmentation is more important on active margins. From the literature and our extrapolations, we infer ages for the onset of formation for~180 coastal sequences. Sea level fingerprinting on coastal sequences started at least during mid Miocene and locally as early as Eocene. Whether due to the changes in the bulk volume of seawater or to the temporal variations in the shape of ocean basins, estimates of eustasy fail to explain the magnitude of the apparent sea level drop. Thus, vertical ground motion is invoked, and we interpret the longlasting development of those paleoshore sequences as the imprint of glacial cycles on globally uplifted margins in response to continental compression. The geomorphological expression of the sequences matches the amplitude and frequency of glacial cyclicity. From middle Pleistocene to present-day, moderately fast (100,000 yrs) oscillating sea levels favor the development of well identified strandlines that are distinct from one another. Pliocene and Lower Pleistocene strandlines associated with faster cyclicity (40,000 yrs) are more compact and easily merge into rasas, whereas older Cenozoic low-frequency eustatic changes generally led to widespread flat-lying coastal plains.

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“…9). The depositional time of the strandlines were estimated as the early-middle Pliocene by Wallace et al (2005). Strontium isotope ages from well-preserved molluscan assemblages of the strandplain successions indicate that the earliest sediments were deposited above the late Miocene unconformity at around 5.8±0.2 Ma (latest Miocene).…”

Section: Discussionmentioning

confidence: 99%

“…Coastal processes associated with younger high sea stand largely tend to obliterate or completely destroy evidence of older terraces whose relative altitude is lower than 10 m (Caputo, 2007). This may account for poor preservation of the early Quaternary marine terraces and a disconformable relationship between the Pliocene and Quaternary marine deposits in southern Victoria (Wallace et al, 2005).…”

Section: Coastal Geomorphology and Preservation Of Marine Terracesmentioning

confidence: 99%

Late Neogene and Quaternary Vertical Motions in the Otway Coast, Southeast Australia (I): Development and Geochronology of Quaternary Marine Terraces

Shin¹

2012

Journal of the Korean earth science society

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This study investigates a neotectonic context of the past 5 Ma for the Otway Ranges along the southern Victoria coast, SE Australia by evaluating the distribution and development of marine terraces along the mountainous coastal area. Uplift rate derived from low terrace deposits using OSL dating method is determined to evaluate the extent to which mild intraplate tectonism has the capability to influence the geomorphic evolution of continental interiors. This study also investigates the stratigraphic relationship between Quaternary marine terraces and Pliocene strandlines, which suggests a change of tectonic activity in the Late Neogene. The intensified tectonic response is well addressed in terms of an increase of the Australian intraplate stress level due to the change of relative motion and increased forces in the boundary between the Australian and Pacific plate.

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Late Neogene strandlines of southern Victoria: a unique record of eustasy and tectonics in southeast Australia

Cited by 56 publications

References 19 publications

Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Late Neogene and Quaternary Vertical Motions in the Otway Coast, Southeast Australia (I): Development and Geochronology of Quaternary Marine Terraces

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