Environmental change during the last glacial maximum (c. 25 000-c. 16 500 years BP) at Mt Richmond, Auckland Isthmus, New Zealand

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dc.contributor.author Sandiford, A. en
dc.contributor.author Horrocks, M. en
dc.contributor.author Newnham, R. en
dc.contributor.author Ogden, J. en
dc.contributor.author Alloway, B. en
dc.date.accessioned 2009-08-25T05:59:37Z en
dc.date.available 2009-08-25T05:59:37Z en
dc.date.issued 2002 en
dc.identifier.citation Journal of the Royal Society of New Zealand 32 (1), 155-167. 2002 en
dc.identifier.issn 0303-6758 en
dc.identifier.other eid=2-s2.0-0036256176 en
dc.identifier.uri http://hdl.handle.net/2292/4825 en
dc.description An open access copy of this article is available from the publishers website. en
dc.description.abstract A 2 m section at the base of Mt Richmond contains a palynological record of the last glacial maximum (LGM) (c. 25 000-c. 16 500 14C years BP) vegetation of the Auckland Isthmus. Three silicic tephra layers derived from the Taupo Volcanic Centre (Okaia Tephra c. 23 500 14C years BP, Kawakawa Tephra c. 22 500 14C years BP) and the Okataina Volcanic Centre (Okareka Tephra c. 18 000 14C years BP), both centres lying within the Taupo Volcanic Zone, provide the basis of the chronology supported by radiocarbon dates. The pollen diagram is divided into two pollen zones separated by the deposition of a locally derived basaltic ash. From c. 25 000-23 000 14C years BP the site was initially a eutrophic lake fringed by Leptospermum and Typha, which altered to a Cyperaceae/Leptospermum-dominated swamp. The regional vegetation at the time was beech-dominated forest; canopy conifers were present but formed a minor part of the local forest. From c 23 000-16 500 14C years BP regional forest was further restricted to local patches in extensive shrubland/grassland. Temperatures may have been depressed by more than 4-5�C. The eruption of a local volcano dammed the swamp outlet resulting in a return to lacustrine conditions. Local volcanism may have accelerated vegetation change already under way as a result of climate change to cooler conditions. This record provides a view of LGM vegetation of the Auckland Isthmus and a template for earlier cold stages of the Quaternary. en
dc.publisher Royal Society Of New Zealand en
dc.relation.ispartofseries Journal of the Royal Society of New Zealand en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0303-6758/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.source.uri http://www.royalsociety.org.nz/publications/journals/nzjr/2002/007 en
dc.title Environmental change during the last glacial maximum (c. 25 000-c. 16 500 years BP) at Mt Richmond, Auckland Isthmus, New Zealand en
dc.type Journal Article en
dc.subject.marsden Fields of Research::210000 Science-General en
pubs.issue 1 en
pubs.begin-page 155 en
pubs.volume 32 en
dc.rights.holder Copyright: Royal Society of New Zealand en
pubs.end-page 167 en


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