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dc.contributor.authorEvenstar, LA
dc.contributor.authorMather, Anne
dc.contributor.authorHartley, AJ
dc.contributor.authorStuart, FM
dc.contributor.authorSparks, RSJ
dc.contributor.authorCooper, FJ
dc.date.accessioned2017-07-29T12:09:58Z
dc.date.available2017-07-29T12:09:58Z
dc.date.issued2017-08
dc.identifier.issn0012-8252
dc.identifier.issn1872-6828
dc.identifier.other0
dc.identifier.urihttp://hdl.handle.net/10026.1/9652
dc.descriptionpublisher: Elsevier articletitle: Geomorphology on geologic timescales: Evolution of the late Cenozoic Pacific paleosurface in Northern Chile and Southern Peru journaltitle: Earth-Science Reviews articlelink: http://dx.doi.org/10.1016/j.earscirev.2017.04.004 content_type: article copyright: © 2017 Elsevier B.V. All rights reserved.
dc.description.abstract

The Atacama Desert on the western margin of the Central Andes is one of the driest and oldest deserts in the world. It is defined by a distinct and ancient surface, known as the Pacific Paleosurface (PPS) or Atacama Paleosurface. The age of this surface is determined as the time at which sediment deposition ceased, and the surface was effectively abandoned. Early studies suggested that this abandonment took place between 14 and 10 Ma, and was related to both the uplift of the Andes and the onset of hyperaridity in the region. Here we provide a regional re-examination of the PPS, compiling existing work on the underlying geology, sedimentology, surface exposure dating, and seismic profiling. We also present new multispectral satellite maps of the PPS and 45 new cosmogenic 3He and 21Ne surface exposure ages in order to constrain the formation age, and the preservation and incision history of the paleosurface. We conclude that the PPS is not a single paleosurface, but instead is a mosaic of smaller surfaces that were formed by aggradational and degradational processes over 19 million years (or more) and should be termed collectively as the Pacific Paleosurfaces. The time at which individual paleosurfaces formed is related to regional climate, where the location of each is controlled by regional tectonic activity. Cosmogenic surface exposure ages suggest that the surfaces are a record of regional scale climate events.

dc.format.extent1-27
dc.languageen
dc.language.isoen
dc.publisherElsevier BV
dc.subjectAndes
dc.subjectPediment
dc.subjectPaleosurface
dc.subjectCosmogenic surface exposure dating
dc.subjectAtacama
dc.subjectDesert pavement
dc.subjectLandscape evolution
dc.subjectClimate
dc.subjectTectonics
dc.subjectRemote sensing
dc.titleGeomorphology on geologic timescales: Evolution of the late Cenozoic Pacific paleosurface in Northern Chile and Southern Peru
dc.typejournal-article
dc.typeReview
dc.typeJournal
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000408289500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.volume171
plymouth.publication-statusAccepted
plymouth.journalEarth-Science Reviews
dc.identifier.doi10.1016/j.earscirev.2017.04.004
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA14 Geography and Environmental Studies
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dcterms.dateAccepted2017-04-07
dc.rights.embargodate2018-4-8
dc.identifier.eissn1872-6828
dc.rights.embargoperiod12 months
rioxxterms.versionofrecord10.1016/j.earscirev.2017.04.004
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved
rioxxterms.licenseref.startdate2017-08
rioxxterms.typeJournal Article/Review


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