Late pliocene age of glacial deposits at Heidemann Valley, East Antarctica: evidence for the last major glaciation in the Vestfold Hills

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dc.contributor.authorColhoun, EAen_AU
dc.contributor.authorKiernan, Ken_AU
dc.contributor.authorMcConnell, Aen_AU
dc.contributor.authorQuilty, PGen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorMurray-Wallace, CVen_AU
dc.contributor.authorWhitehead, Jen_AU
dc.date.accessioned2010-04-19T05:39:56Zen_AU
dc.date.accessioned2010-04-30T05:08:41Zen_AU
dc.date.available2010-04-19T05:39:56Zen_AU
dc.date.available2010-04-30T05:08:41Zen_AU
dc.date.issued2010-02en_AU
dc.date.statistics2010-02en_AU
dc.description.abstractA Pliocene (2.6–3.5 Ma) age is determined from glacial sediments studied in a 20 m long, 4 m deep trench excavated in Heidemann Valley, Vestfold Hills, East Antarctica. The age determination is based on a combined study of amino acid racemization, diatoms, foraminifera, and magnetic polarity, and supports earlier estimates of the age of the sedimentary section; all are beyond 14C range. Four till units are recognized and documented, and 16 subunits are identified. All are ascribed to deposition during a Late Pliocene glaciation that was probably the last time the entire Vestfold Hills was covered by an enlarged East Antarctic Ice Sheet (EAIS). Evidence for other more recent glacial events of the ‘Vestfold Glaciation’ may have been due to lateral expansion of the Sørsdal Glacier and limited expansion of the icesheet margin during the Last Glacial Maximum rather than a major expansion of the EAIS. The deposit appears to correlate with a marine deposition event recorded in Ocean Drilling Program Site 1166 in Prydz Bay, possibly with the Bardin Bluffs Formation of the Prince Charles Mountains and with part of the time represented in the ANDRILL AND-1B core in the Ross Sea. © 2010, Cambridge University Pressen_AU
dc.identifier.citationColhoun, E. A., Kiernan, K. W., McConnell, A., Quilty, P. G., Fink, D., Murray-Wallace, C. V., & Whitehead, J. (2010). Late pliocene age of glacial deposits at Heidemann Valley, East Antarctica: evidence for the last major glaciation in the Vestfold Hills. Antarctic Science, 22(1), 53-64. doi:10.1017/S0954102009990526en_AU
dc.identifier.govdoc1559en_AU
dc.identifier.issn0954-1020en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleAntarctic Scienceen_AU
dc.identifier.pagination53-64en_AU
dc.identifier.urihttp://dx.doi.org/10.1017/S0954102009990526en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3208en_AU
dc.identifier.volume22en_AU
dc.language.isoenen_AU
dc.publisherCambridge University Pressen_AU
dc.subjectAntarcticaen_AU
dc.subjectGlaciersen_AU
dc.subjectExcavationen_AU
dc.subjectRacemizationen_AU
dc.subjectForaminiferaen_AU
dc.subjectDiatomsen_AU
dc.titleLate pliocene age of glacial deposits at Heidemann Valley, East Antarctica: evidence for the last major glaciation in the Vestfold Hillsen_AU
dc.typeJournal Articleen_AU
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