Repository logo
 
Publication

Holocene evolution of a barrier island system, Ria Formosa, South Portugal

dc.contributor.authorSousa, Carlos
dc.contributor.authorBoski, T.
dc.contributor.authorPereira, Laura
dc.date.accessioned2020-07-24T10:53:30Z
dc.date.available2020-07-24T10:53:30Z
dc.date.issued2019-01
dc.description.abstractHolocene evolution of the Ria Formosa barrier island system was studied through the examination of a large subsurface dataset acquired from 191 boreholes and five seismic refraction profiles. Two boreholes with total depths of 26 and 16.5 m were selected for a multi-proxy detailed laboratory analysis, including mean grain size distribution, organic matter (OM) content, color variation, shell identification, and benthic foraminifera assemblages. Selected cores are thought to be representative of the identified depositional sub-basins. Subsurface age data from 16 AMS C-14 dated samples were plotted against depth and resulted in a coherent age model of sedimentary infill. The system evolution was largely controlled by sediment availability, accommodation space, and Holocene sea level rise, first at a rapid rate of 7 mm/yr from 10 kcal yr BP to 7.25 kcal yr BP, followed by a slowdown to 1.1 mm/yr until present. A conceptual model for the origin and Holocene evolution of the Ria Formosa barrier island system implies three main steps, leading to the present system geomorphology: (1) marine flooding of incised palaeovalleys by the rapid transgression of palaeovalleys in the early Holocene
dc.description.abstract(2) development of a proto-barrier island chain perched on Pleistocene detritic headlands and steeper interfluve areas during the early to middle Holocene
dc.description.abstractand (3) full development of the barrier islands chain and enclosing of the coastal lagoon, followed by the maturation of the system with subsequent siltation and salt marsh expansion from the middle Holocene until present. The onset of barrier system formation dates back to ca. 8 kcal yr BP, predating previously proposed age.
dc.description.sponsorshipSIHER project [PTDC/CTE-GIX112236/2009]
dc.description.sponsorshipEU Erasmus Mundus Joint Doctorate in Marine and Coastal Management (MACOMA) fellowship grant, under University of Algarve
dc.description.sponsorshipEU Erasmus Mundus Joint Doctorate in Marine and Coastal Management (MACOMA) fellowship grant, under University of Cadiz
dc.identifier.doi10.1177/0959683618804639
dc.identifier.issn0959-6836
dc.identifier.issn1477-0911
dc.identifier.urihttp://hdl.handle.net/10400.1/14499
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSage Publications Ltd
dc.subjectSea-level rise
dc.subjectInner continental-shelf
dc.subjectLast glacial maximum
dc.subjectGeologic framework
dc.subjectSediment budget
dc.subjectLong-term
dc.subjectAlgarve
dc.subjectStratigraphy
dc.subjectMorphology
dc.subjectReconstruction
dc.titleHolocene evolution of a barrier island system, Ria Formosa, South Portugal
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage76
oaire.citation.issue1
oaire.citation.startPage64
oaire.citation.titleHolocene
oaire.citation.volume29
person.familyNameSousa
person.familyNameBoski
person.familyNamePereira
person.givenNameCarlos
person.givenNameTomasz
person.givenNameLaura
person.identifier.ciencia-idA517-F297-AD4F
person.identifier.ciencia-id1416-B317-51D1
person.identifier.orcid0000-0002-7366-1358
person.identifier.orcid0000-0003-2462-4179
person.identifier.orcid0000-0003-1977-798X
person.identifier.scopus-author-id57200399146
person.identifier.scopus-author-id6602267486
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication11bb1503-7e31-4177-a01c-30982966ee69
relation.isAuthorOfPublicationa857b0c7-90ab-473b-a62e-e92b452e604d
relation.isAuthorOfPublication14501fce-252a-4ac1-8c7e-3bc524c62f6e
relation.isAuthorOfPublication.latestForDiscovery11bb1503-7e31-4177-a01c-30982966ee69

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
14499.pdf
Size:
2.31 MB
Format:
Adobe Portable Document Format