Evidence for expanded Middle and Late Pleistocene glacier extent in northwest Nelson, New Zealand.

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dc.contributor.authorThackray, GDen_AU
dc.contributor.authorShulmeister, Jen_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2010-04-08T06:46:30Zen_AU
dc.date.accessioned2010-04-30T05:08:55Zen_AU
dc.date.available2010-04-08T06:46:30Zen_AU
dc.date.available2010-04-30T05:08:55Zen_AU
dc.date.issued2009-12en_AU
dc.date.statistics2009-12en_AU
dc.description.abstractThe extent of Late Quaternary glaciation in the northwest Nelson region of New Zealand has traditionally been regarded as minor, with small-scale valley glaciation in confined upland reaches. New geomorphological evidence, including moraines, kame terraces, till-mantled bedrock and outwash terraces, indicate that greatly expanded valley glaciers flowed into the lowland valley system at the mouths of the Cobb-Takaka and Anatoki drainages. The timing for this ice advance into lowland valleys is constrained by lowland landform characteristics and a single cosmogenic exposure age, suggesting Late and Middle Pleistocene ice expansion, respectively. Evidence for expanded upland ice on the Mount Arthur Tableland and adjacent areas includes trimlines, boulder trains and roche moutonées. Two cosmogenic exposure ages on upland bedrock surfaces suggest that major ice expansion occurred during MIS 3 and/or 4, while previously published exposure dating from Cobb Valley suggests large MIS 2 ice expansion as well. The inferred, markedly expanded ice left little or no clear geomorphic imprint on the Cobb–Takaka Gorge, and required temperature depression of 4–6°C with near-modern precipitation levels. © 2009, Wiley-Blackwell.en_AU
dc.identifier.citationThackray, G. D., Shulmeister, J., & Fink, D. (2009). Evidence for expanded Middle and Late Pleistocene glacier extent in northwest Nelson, New Zealand. Geografiska Annaler Series A, 91(4), 291-311. doi:10.1111/j.1468-0459.2009.00371.xen_AU
dc.identifier.govdoc1574en_AU
dc.identifier.issn0435-3676en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleGeografiska Annaler Series Aen_AU
dc.identifier.pagination291-311en_AU
dc.identifier.urihttp://dx.doi.org/10.1111/j.1468-0459.2009.00371.xen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3119en_AU
dc.identifier.volume91en_AU
dc.language.isoenen_AU
dc.publisherWiley-Blackwellen_AU
dc.subjectNew Zealanden_AU
dc.subjectPleistocene epochen_AU
dc.subjectGlaciersen_AU
dc.subjectGeomorphologyen_AU
dc.subjectPaleoclimatologyen_AU
dc.subjectExpansionen_AU
dc.titleEvidence for expanded Middle and Late Pleistocene glacier extent in northwest Nelson, New Zealand.en_AU
dc.typeJournal Articleen_AU
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