Journal article
A near-field sea level record of east antarctic ice sheet instability from 32 to 27 Myr
SJ Gallagher, G Villa, RN Drysdale, BS Wade, H Scher, Q Li, MW Wallace, GR Holdgate
Paleoceanography | Published : 2013
DOI: 10.1029/2012PA002326
Abstract
Fossil, facies, and isotope analyses of an early high-paleolatitude (55°S) section suggests a highly unstable East Antarctic Ice Sheet from 32 to 27 Myr. The waxing and waning of this ice sheet from 140% to 40% of its present volume caused sea level changes of +25 m (ranging from -30 to +50 m) related to periodic glacial (100,000 to 200,000 years) and shorter interglacial events. The near-field Gippsland sea level (GSL) curve shares many similarities to the far-field New Jersey sea level (NJSL) estimates. However, there are possible resolution errors due to biochronology, taphonomy, and paleodepth estimates and the relative lack of lowstand deposits (in NJSL) that prevent detailed correlatio..
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Awarded by Australian Research Council
Funding Acknowledgements
We are grateful to Paul Pearson (Cardiff University), Michelle Kominz, and an anonymous reviewer for their constructive reviews of this paper. We thank Mike Wiltshire (Occam Technology), who donated the wireline log data. This research was partly supported by ARC DP0558150 (M.W. and S.G.). Wiltshire Geosciences donated the wireline log data. DPI Victoria (Terry Smith) and ESSO Australia (Adem Djakic) are to be thanked for allowing access to the Groper-1 core. We are grateful to Colin MacPherson and Joanne Peterkin for stable isotope analyses at Durham University, which were funded by a Natural Environment Research Council (NE/G014817/1) grant to B.W.