Spatial and temporal variability in the Holocene sea-level record of the South Australian coastline

Belperio, A.P.; Harvey, Nicholas Peter; Bourman, Robert P.

doi:10.1016/s0037-0738(01)00273-1

Cited by 90 publications

(81 citation statements)

References 31 publications

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“…This is consistent with observations and descriptions in other similar environments (Grand Pre et al, 2012). Prop-root type mangroves generally form peats when above mean high-tide level, suggesting a history of relative sea-level rise over the span of the cores (Belperio, Harvey, and Bourman, 2002;Dura et al, 2011;Ellison, 2008;Engelhart et al, 2007;Grand Pre et al, 2012;Ramcharan and McAndrews, 2006;Rowe, 2007;Saintilan and Hashimoto, 1999). Interbedded with the peat are 10-15 cm thick horizons of featureless gray-green mud, which could not be correlated between cores.…”

Section: Resultssupporting

confidence: 89%

“…Repeat cores at individual locations~1 m apart, however, did reveal coherency. Such lateral variation is not uncommon for mangrove wetlands, where lateral variations in compaction, depositional environment, and preexisting topography are typical (Belperio, Harvey, and Bourman, 2002;Berkeley et al, 2009;Dura et al, 2011). Primary depositional features were also poorly preserved in cores, likely due to bioturbation and slow burial (see below).…”

Section: Resultsmentioning

confidence: 99%

“…This peninsula is a beveled beach ridge, or chenier ridge, and is composed of semi-indurated, well-sorted, coarse, shell-rich sand ( Figure 3). The estuary gives way to a broad, ecologically zoned mudflat wetland with a well-developed mangrove ecosystem ( (Belperio, Harvey, and Bourman, 2002;Ellison, 2008;Grand Pre et al, 2012;Ramcharan and McAndrews, 2006;Rowe, 2007;Saintilan and Hashimoto, 1999). Although a detailed topographic survey along the profile in Figure 4 has not been completed, observations show that the supratidal salt flat (Zone D) is flooded by tidal sheetflow only at spring tide conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Atwater, 1987;Cisternas et al, 2005;Nelson, Shennan, and Long, 1996;Shennan et al, 2014). This approach is more challenging in the complex deposits of tropical mangrove-dominated wetlands, yet it has locally been shown to be effective at documenting paleoseismic events and relative sea-level change (Belperio, Harvey, and Bourman, 2002;Berkeley et al, 2009;Dura et al, 2011;Grand Pre et al, 2012;Jankaew et al, 2008;Monecke et al, 2008;Rashid et al, 2013). The use of recent coastal stratigraphy to document paleoearthquakes may be even more challenging where recurrence intervals are short (,0.1 ka) or coseismic motions are small (,1 m).…”

Section: Introductionmentioning

confidence: 99%

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Potential for Geologic Records of Coseismic Uplift and Megathrust Rupture along the Nicoya Peninsula, Costa Rica

Spotila

Marshall

DePew

et al. 2015

Journal of Coastal Research

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Potential for Geologic Records of Coseismic Uplift and Megathrust Rupture along the Nicoya Peninsula, Costa Rica

Spotila

Marshall

DePew

et al. 2015

Journal of Coastal Research

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“…processes (Milne & Mitrovica 2008), as noted for Holocene coastal successions (Belperio, Harvey & Bourman 2002;Lewis et al 2013). In particular, the combined effects of continental levering (hydro-isostasy) and equatorial-ocean siphoning, involving forebulge collapse and withdrawal of water from equatorial regions to areas of former forebulges (Mitrovica & Peltier 1991), are expressed as a slight, relative sea level fall following the attainment of the post-glacial highstand.…”

Section: Introductionmentioning

confidence: 67%

Last interglacial (MIS 5e) sea-level determined from a tectonically stable, far-field location, Eyre Peninsula, southern Australia

Murray-Wallace

Belperio²,

Dosseto

et al. 2016

Australian Journal of Earth Sciences

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The last interglacial maximum (Marine Isotope Substage 5e [MIS 5e], 128¿116 ka) is a distinctive event in recent Earth history. Shoreline successions of this age are important for calibrating climate models and defining the overall behaviour of the crust¿mantle system to fluctuating ice and ocean-water volumes. In a global context, the recently intensified interest in last interglacial shoreline successions has revealed considerable variability in the magnitude of sea-level rise during this time interval and highlighted the need to examine paleosea-level evidence from tectonically stable, far-field settings. Situated in the far-field of continental ice sheets and on the tectonically stable Gawler Craton, the 300 km coastal sector of western Eyre Peninsula between Fowlers Bay and Lake Newland in southern Australia represents an important region for defining the glacio-eustatic (ice-equivalent) sea-level attained during the last interglacial maximum based on the relative sea-level observations from this region. Low-energy, shoaling upward, peritidal bioclastic carbonate successions of the last interglacial (locally termed Glanville Formation) formed within back-barrier, estuarine¿lagoonal environments in the lee of eolianite barrier complexes (locally termed Bridgewater Formation) along this coastline. The well-preserved shelly successions (coquinas) contain diverse molluscan fossil assemblages including species no longer living in the coastal waters of South Australia (e.g. the Sydney cockle Anadara trapezia and the benthic foraminifer Marginopora vertebralis). The extent of amino acid racemisation (a measure of fossil age based on increasing d/l value) in a range of species, and in particular A. trapezia and Katelysia sp., confirms the time equivalence of the isolated embayment-fill successions, correlated with the informal type section of the Glanville Formation at Dry Creek, north of Adelaide. Preliminary Useries analyses on A. trapezia also suggest a correlation with the last interglacial maximum, but further highlight the complexity in dating fossil molluscs by the U-series method in view of their open-system behaviour. The shelly successions of the Glanville Formation occur at elevations higher than attained by sealevel in the current, Holocene interglacial. A higher sea-level of between 2.1 ± 0.5 and 4 ± 0.5 m above present sea-level is inferred for the last interglacial maximum (MIS 5e) along this coastline based on the elevation of sedimentary successions host to the shallow subtidal¿intertidal fossil molluscs Katelysia sp., and Anadara trapezia. The paleosea-level observations place a lower limit on the sea-level attained during the last interglacial maximum and suggest that caution be exercised in the definition of the upper limit of sea-level during this interglacial. along this coastline based on the elevation of sedimentary successions host to the shallow subtidalintertidal fossil molluscs Katelysia sp., and Anadara trapezia. The palaeosea level observations place a lower limit on the sea ...

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Inferences of mantle viscosity based on ice age data sets: Radial structure

et al. 2016

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We perform joint nonlinear inversions of glacial isostatic adjustment (GIA) data, including the following: postglacial decay times in Canada and Scandinavia, the Fennoscandian relaxation spectrum (FRS), late‐Holocene differential sea level (DSL) highstands (based on recent compilations of Australian sea level histories), and the rate of change of the degree 2 zonal harmonic of the geopotential, J2. Resolving power analyses demonstrate the following: (1) the FRS constrains mean upper mantle viscosity to be ∼3 × 1020 Pa s, (2) postglacial decay time data require the average viscosity in the top ∼1500 km of the mantle to be 1021 Pa s, and (3) the J2 datum constrains mean lower mantle viscosity to be ∼5 × 1021 Pa s. To reconcile (2) and (3), viscosity must increase to 1022–1023 Pa s in the deep mantle. Our analysis highlights the importance of accurately correcting the J2 observation for modern glacier melting in order to robustly infer deep mantle viscosity. We also perform a large series of forward calculations to investigate the compatibility of the GIA data sets with a viscosity jump within the lower mantle, as suggested by geodynamic and seismic studies, and conclude that the GIA data may accommodate a sharp jump of 1–2 orders of magnitude in viscosity across a boundary placed in a depth range of 1000–1700 km but does not require such a feature. Finally, we find that no 1‐D viscosity profile appears capable of simultaneously reconciling the DSL highstand data and suggest that this discord is likely due to laterally heterogeneous mantle viscosity, an issue we explore in a companion study.

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Spatial and temporal variability in the Holocene sea-level record of the South Australian coastline

Cited by 90 publications

References 31 publications

Potential for Geologic Records of Coseismic Uplift and Megathrust Rupture along the Nicoya Peninsula, Costa Rica

Potential for Geologic Records of Coseismic Uplift and Megathrust Rupture along the Nicoya Peninsula, Costa Rica

Last interglacial (MIS 5e) sea-level determined from a tectonically stable, far-field location, Eyre Peninsula, southern Australia

Inferences of mantle viscosity based on ice age data sets: Radial structure

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