An integrated sequence stratigraphic, palaeoenvironmental, and chronostratigraphic analysis of the Tangahoe Formation, southern Taranaki coast, with implications for mid‐Pliocene (c. 3.4–3.0 Ma) glacio‐eustatic sea‐level changes

Naish, T.; Wehland, Florian; Wilson, Gary; Browne, Greg H.; Cook, Richard A.; Morgans, Hugh E. G.; Rosenberg, M. D.; King, Peter R.; Smale, David; Nelson, Campbell S.; Kamp, Peter J.J.; Ricketts, B D

doi:10.1080/03014223.2005.9517780

Cited by 41 publications

(51 citation statements)

References 46 publications

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“…There are more such truncated facies associations than there are seismic sequence boundaries, and it is therefore possible that some of the truncated facies associations may represent higher order cycles or autocyclicity related to migration of distributaries and/or shelf depocenters. The facies associations, both complete and truncated, are similar to those known from the Wanganui Basin, between North Island and South Island of New Zealand Saul et al, 1999;Abbott et al, 2005;Naish et al, 2005).…”

Section: Potential Sequence Boundaries In Coressupporting

confidence: 53%

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Fulthorpe

Hoyanagi

Blum

et al. 2010

IODP Preliminary Report

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Section: Potential Sequence Boundaries In Coressupporting

confidence: 53%

Untitled

Fulthorpe

Hoyanagi

Blum

et al. 2010

IODP Preliminary Report

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“…Some of these are relatively well-constrained by local empirical evidence, but others require inference from modeling, or from regional geological and paleoenvironmental sources. Our parameterization of climatic components uses values adopted by Staiger et al [2006] and Johnson and Staiger [2007] (Table 1); LGM relative sea level elevation (+50 m) is based on results of a global isostatic model [Peltier, 2004], and mid-Pliocene values are based on geological data indicating a eustatic sea level also slightly higher than present (c. +25 m) [Wardlaw and Quinn, 1991;Naish, 1997;Naish et al, 2005;Dwyer and Chandler, 2009]. Ocean temperatures and calving rate are unknown quantities for all paleo scenarios, and therefore require further consideration.…”

Section: Time-dependent Simulationsmentioning

confidence: 99%

Geometry and dynamics of an East Antarctic Ice Sheet outlet glacier, under past and present climates

Golledge

Levy

2011

J. Geophys. Res.

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The behavior of East Antarctic Ice Sheet (EAIS) outlet glaciers both at present and during the recent geological past is of considerable interest both from the point of view of understanding the mechanics of contemporary glacier dynamics, and also with regard to epoch‐scale ice sheet stability during Plio‐Pleistocene climate transitions. Here we use a glacier flowline model that incorporates the effects of longitudinal stresses to numerically simulate Ferrar Glacier, first under present‐day environmental conditions, and subsequently under both colder and warmer climate regimes representing the Last Glacial Maximum (LGM) and mid‐Pliocene peak warmth respectively. Using airborne radar profiles, InSAR‐derived surface velocities, ice core and geological data for empirical constraint, we present a diagnostic simulation that uses an iterative method to closely reproduce observed dynamics. Our model suggests that the glacier is largely cold‐based under present conditions, flows predominantly by way of internal deformation, and ‘cascades’ over bedrock ridges due to the combined action of changes in cross‐sectional valley geometry, local steepening of the glacier surface, and the non‐local effects of longitudinal coupling. Time‐dependent (evolutionary) simulation of a lower‐profile glacier under a colder, drier, LGM climate, predicts flow velocities lower than present with minimal bedrock erosion or basal till flux. Conversely, the warmer‐than‐present mid‐Pliocene climate produces a more dynamic glacier that is warm‐based and sliding along much of its bed. We propose that EAIS outlet glaciers, such as the Ferrar, respond dynamically along their length in response to changing environmental forcings, with most significant changes taking place in their lower reaches. Adjustment to perturbations in upper catchments is more muted.

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“…Numerous previous studies have examined the topic of continental ice volume and sea-level change during the Mid-Pliocene warm period (e.g. Dowsett & Cronin 1990;Webb & Harwood 1993;Kennett & Hodell 1995;Warnke et al 1996;Naish et al 2005;see Hill et al 2007 for a review) with considerable focus on the question of the stability of the AIS. No clear consensus has emerged, although reasonable arguments have been presented for both stable and unstable Antarctic ice during the Pliocene.…”

Section: Introductionmentioning

confidence: 99%

Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes

Dwyer

Chandler

2008

Phil. Trans. R. Soc. A.

150

106

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Ostracode magnesium/calcium (Mg/Ca)-based bottom-water temperatures were combined with benthic foraminiferal oxygen isotopes in order to quantify the oxygen isotopic composition of seawater, and estimate continental ice volume and sea-level variability during the Mid-Pliocene warm period, ca 3.3-3.0 Ma. Results indicate that, following a low stand of approximately 65 m below present at marine isotope stage (MIS) M2 (ca 3.3 Ma), sea level generally fluctuated by 20-30 m above and below a mean value similar to presentday sea level. In addition to the low-stand event at MIS M2, significant low stands occurred at MIS KM2 (K40 m), G22 (K40 m) and G16 (K60 m). Six high stands of C10 m or more above present day were also observed; four events (C10, C25,C15 and C30 m) from MIS M1 to KM3, a high stand of C15 m at MIS K1, and a high stand of C25 m at MIS G17. These results indicate that continental ice volume varied significantly during the MidPliocene warm period and that at times there were considerable reductions of Antarctic ice.

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An integrated sequence stratigraphic, palaeoenvironmental, and chronostratigraphic analysis of the Tangahoe Formation, southern Taranaki coast, with implications for mid‐Pliocene (c. 3.4–3.0 Ma) glacio‐eustatic sea‐level changes

Cited by 41 publications

References 46 publications

Untitled

Untitled

Geometry and dynamics of an East Antarctic Ice Sheet outlet glacier, under past and present climates

Mid-Pliocene sea level and continental ice volume based on coupled benthic Mg/Ca palaeotemperatures and oxygen isotopes

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