Luminescence chronology of loess-paleosol sequences form southern South Island, New Zealand
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Berger, Glenn W; Pillans, Bradley; Bruce, J G; McIntosh, P D
Description
The loess-paleosol sequences in New Zealand are among the thickest in the southern hemisphere, and preserve an important terrestrial record of paleoclimatic changes. Unlike loess-paleosol sequences in North Island, most of those in South Island lack discrete chronostratigraphic marker ash beds, excepting perhaps the widespread ∼24 ka Kawakawa Tephra. Therefore, any specific correlation to marine isotope stage (MIS) proxy records or to loess-paleosol sequences in the northern hemisphere has been...[Show more]
dc.contributor.author | Berger, Glenn W | |
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dc.contributor.author | Pillans, Bradley | |
dc.contributor.author | Bruce, J G | |
dc.contributor.author | McIntosh, P D | |
dc.date.accessioned | 2015-12-13T22:24:33Z | |
dc.identifier.issn | 0277-3791 | |
dc.identifier.uri | http://hdl.handle.net/1885/72774 | |
dc.description.abstract | The loess-paleosol sequences in New Zealand are among the thickest in the southern hemisphere, and preserve an important terrestrial record of paleoclimatic changes. Unlike loess-paleosol sequences in North Island, most of those in South Island lack discrete chronostratigraphic marker ash beds, excepting perhaps the widespread ∼24 ka Kawakawa Tephra. Therefore, any specific correlation to marine isotope stage (MIS) proxy records or to loess-paleosol sequences in the northern hemisphere has been unknown. Hence, we applied luminescence sediment dating to four key loess-paleosol sequences from southern South Island. Although these pioneering results suggest that further sampling and luminescence dating are needed, they do provide: (1) the first numeric age constraint (44±3ka on overlying loess) for the end of deposition of the geomorphically and paleoclimatically important Edendale Terrace gravels; (2) the first numeric evidence that the youngest loess-paleosol unit (L1) at the near-coastal Romahapa and inland Stewarts Claim sites began to be preserved much earlier (at ∼60 ka) than at the inland Kingston Crossing site (∼35 ka); (3) the first direct evidence that the 6 m Romahapa sequence extends at least to ∼350 ka, the oldest yet TL-dated such sequence in South Island. Furthermore, the stratigraphically self-consistent (with one exception) luminescence ages between ∼60 and ∼350ka conflict with a previous indirect chronostratigraphy inferred from trace concentrations of glass shards. This traceshard chronology implies a major hiatus in loess-paleosol preservation (missing at least MIS 6-7) not recognized by luminescence dating. | |
dc.publisher | Pergamon-Elsevier Ltd | |
dc.source | Quaternary Science Reviews | |
dc.subject | Keywords: Isotopes; Sediments; Stratigraphy; Luminescence chronology; Climate change; chronology; loess; luminescence dating; paleoclimate; paleosol; New Zealand; Euthynnus affinis; Fraxinus; Hiatus | |
dc.title | Luminescence chronology of loess-paleosol sequences form southern South Island, New Zealand | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 21 | |
dc.date.issued | 2002 | |
local.identifier.absfor | 040303 - Geochronology | |
local.identifier.ariespublication | MigratedxPub3423 | |
local.type.status | Published Version | |
local.contributor.affiliation | Berger, Glenn W, Desert Research Institute | |
local.contributor.affiliation | Pillans, Bradley, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Bruce, J G, Victoria University of Wellington | |
local.contributor.affiliation | McIntosh, P D, Forest Practices Board, Tasmania | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.startpage | 1899 | |
local.bibliographicCitation.lastpage | 1913 | |
local.identifier.doi | 10.1016/S0277-3791(02)00021-5 | |
dc.date.updated | 2015-12-11T08:07:21Z | |
local.identifier.scopusID | 2-s2.0-0036720804 | |
Collections | ANU Research Publications |
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