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Australian desert dune fields initiated with Pliocene-Pleistocene global climatic shift

Fujioka, Toshiyuki; Chappell, John; Fifield, L Keith; Rhodes, J.

Description

Development of continental aridity has been linked to late Cenozoic global cooling, but the evidence is indirect, based on terrestrial loess deposits and eolian silt in marine sediments, whereas direct dating of the inception of arid landforms has been frustrated by a lack of suitable methods. Here we report the first age determination of a major arid-zone dune field, based on cosmogenic 10Be and 26Al measurements of drill cores from dunes in the Simpson Desert, central Australia. Results show...[Show more]

dc.contributor.authorFujioka, Toshiyuki
dc.contributor.authorChappell, John
dc.contributor.authorFifield, L Keith
dc.contributor.authorRhodes, J.
dc.date.accessioned2015-12-10T22:29:01Z
dc.identifier.issn0091-7613
dc.identifier.urihttp://hdl.handle.net/1885/54705
dc.description.abstractDevelopment of continental aridity has been linked to late Cenozoic global cooling, but the evidence is indirect, based on terrestrial loess deposits and eolian silt in marine sediments, whereas direct dating of the inception of arid landforms has been frustrated by a lack of suitable methods. Here we report the first age determination of a major arid-zone dune field, based on cosmogenic 10Be and 26Al measurements of drill cores from dunes in the Simpson Desert, central Australia. Results show that the dune field began to form ca. 1 Ma, whereas dating using quartz optically stimulated luminescence indicates episodic dune building during late Quaternary ice ages. Less intense desertification began earlier; the previous cosmogenic exposure dating showed that neighboring stony deserts began to form at the onset of Quater nary ice ages 2-4 Ma. Aridity deepened and the dune field formed when ice age cycles increased their amplitude and switched their periods from 40 k.y. to 100 k.y. ca. 1 Ma.
dc.publisherGeological Society of America Inc
dc.sourceGeology
dc.subjectKeywords: Age determination; Australia; Climatic shifts; Cosmogenic exposure; Desert dunes; Drill core; Dune fields; Global cooling; Ice age; Late Cenozoic; Late quaternary; Marine sediments; Optically stimulated luminescence; Pleistocene; Pliocene; Simpson; Stony
dc.titleAustralian desert dune fields initiated with Pliocene-Pleistocene global climatic shift
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume37
dc.date.issued2009
local.identifier.absfor040601 - Geomorphology and Regolith and Landscape Evolution
local.identifier.absfor040303 - Geochronology
local.identifier.ariespublicationu4155331xPUB308
local.type.statusPublished Version
local.contributor.affiliationFujioka, Toshiyuki, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationChappell, John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFifield, L Keith, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRhodes, J., Manchester Metropolitan University
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage51
local.bibliographicCitation.lastpage54
local.identifier.doi10.1130/G25042A.1
dc.date.updated2016-02-24T10:38:36Z
local.identifier.scopusID2-s2.0-67650351678
local.identifier.thomsonID000262428200013
CollectionsANU Research Publications

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