Extremes in dune preservation: controls on the completeness of fluvial deposits

Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct palaeoenvironments and palaeoclimates. Dune sets are ubiquitous in preserved river deposits and are typically interpreted based on a model that that describes the recurrence of er...

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Detalhes bibliográficos
Autores: Reesink, Arnold J., Van den Berg, J. H., Parsons, Daniel R., Amsler, Mario Luis, Best, James L., Hardy, Richard J., Orfeo, Oscar, Szupiany, Ricardo Nicolas
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/26779
Acesso em linha:http://hdl.handle.net/11336/26779
Access Level:acceso abierto
Palavra-chave:DUNES
UNIR BARS
PRESERVATION
RIVER DEPOSITS
STRATIGRAPHIC COMPLETENESS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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oai_identifier_str oai:ri.conicet.gov.ar:11336/26779
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Extremes in dune preservation: controls on the completeness of fluvial deposits
title Extremes in dune preservation: controls on the completeness of fluvial deposits
spellingShingle Extremes in dune preservation: controls on the completeness of fluvial deposits
Reesink, Arnold J.
DUNES
UNIR BARS
PRESERVATION
RIVER DEPOSITS
STRATIGRAPHIC COMPLETENESS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Extremes in dune preservation: controls on the completeness of fluvial deposits
title_full Extremes in dune preservation: controls on the completeness of fluvial deposits
title_fullStr Extremes in dune preservation: controls on the completeness of fluvial deposits
title_full_unstemmed Extremes in dune preservation: controls on the completeness of fluvial deposits
title_sort Extremes in dune preservation: controls on the completeness of fluvial deposits
dc.creator.none.fl_str_mv Reesink, Arnold J.
Van den Berg, J. H.
Parsons, Daniel R.
Amsler, Mario Luis
Best, James L.
Hardy, Richard J.
Orfeo, Oscar
Szupiany, Ricardo Nicolas
author Reesink, Arnold J.
author_facet Reesink, Arnold J.
Van den Berg, J. H.
Parsons, Daniel R.
Amsler, Mario Luis
Best, James L.
Hardy, Richard J.
Orfeo, Oscar
Szupiany, Ricardo Nicolas
author_role author
author2 Van den Berg, J. H.
Parsons, Daniel R.
Amsler, Mario Luis
Best, James L.
Hardy, Richard J.
Orfeo, Oscar
Szupiany, Ricardo Nicolas
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv DUNES
UNIR BARS
PRESERVATION
RIVER DEPOSITS
STRATIGRAPHIC COMPLETENESS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic DUNES
UNIR BARS
PRESERVATION
RIVER DEPOSITS
STRATIGRAPHIC COMPLETENESS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct palaeoenvironments and palaeoclimates. Dune sets are ubiquitous in preserved river deposits and are typically interpreted based on a model that that describes the recurrence of erosion in a vertical sequence, but without consideringspatial variability. However, spatial variability in flow and sediment transport will change the recurrence of erosion, and therefore dune preservation. In order to better understand the limits of these Interpretations and outline the causes of potential variability in preservation potential, this paper reviews existing work and presents new observations of an extreme end-member of dune preservation: ?form-sets?, formed by dunes in which both stoss- and lee- slopes are preserved Intact. These form-sets do not conform to models that are based on the recurrence of erosion, since erosion does not recur in their case, and can therefore be used to evaluate the assumptions that underpin sedimentary preservation. New Ground Penetrating Radar data from the Río Paraná, Argentina, show dune fields that are buried intact within larger scale barforms. These trains of form-sets are up to 300 m in length, are restricted to unit-bar troughs in the upper 5 m of the channel deposits, occur in >5% of the mid-channel bar deposits, show reactivation surfaces, occur in multiple levels, and match the size of average-flow dunes. A review of published accounts of form-sets highlights a diversity of processes that can be envisaged for their formation: i) abandonment after extreme floods, ii) slow burial of abandoned dune forms by cohesive clay in sheltered bar troughs and meander-neck cut-offs, iii) fast burial by mass-movement processes, and iv)climbing of dune sets due to local dominance of deposition over dune migration.Analysis of these new and published accounts of form-sets and their burial processes highlights that form-sets need not be indicative of extreme floods. Instead, form-sets are closely associated with surrounding geomorphology such as river banks, meander-neck cutoffs,and bars because this larger-scale context controls the local sediment budget and the nature of recurrence of erosion. Locally enhanced preservation by the ?extreme? dominance of deposition is further promoted by finer grain sizes and prolonged changes in flow stage. Such conditions are characteristic, although not exclusive, of large lowland rivers such as the Río Paraná. The spatial control on dune preservation is critical: although at-a-point models adequately describe near-horizontal sets of freely migrating dunes in uniform flows, they are unsuitable for inclined dune co-sets and other cases where multiple scales of bedforms interact. Spatial and temporal variations in flow and sediment transport betweenthe thalweg and different positions on larger bar-forms can change the preservation potential of dunes within river channels. Therefore, dune set thickness distributions are likely grouped in larger-scale units that reflect both formative dune geometries and bar-scale variations inpreservation potential. The multi-scale dynamics of preservation highlighted herein also provides a useful comparison for other sedimentary systems
publishDate 2015
dc.date.none.fl_str_mv 2015-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/26779
Reesink, Arnold J.; Van den Berg, J. H.; Parsons, Daniel R.; Amsler, Mario Luis; Best, James L.; et al.; Extremes in dune preservation: controls on the completeness of fluvial deposits; Elsevier Science; Earth-science Reviews; 150; 9-2015; 652-665
0012-8252
1872-6828
CONICET Digital
CONICET
url http://hdl.handle.net/11336/26779
identifier_str_mv Reesink, Arnold J.; Van den Berg, J. H.; Parsons, Daniel R.; Amsler, Mario Luis; Best, James L.; et al.; Extremes in dune preservation: controls on the completeness of fluvial deposits; Elsevier Science; Earth-science Reviews; 150; 9-2015; 652-665
0012-8252
1872-6828
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2015.09.008
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S001282521530043X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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spelling Extremes in dune preservation: controls on the completeness of fluvial depositsReesink, Arnold J.Van den Berg, J. H.Parsons, Daniel R.Amsler, Mario LuisBest, James L.Hardy, Richard J.Orfeo, OscarSzupiany, Ricardo NicolasDUNESUNIR BARSPRESERVATIONRIVER DEPOSITSSTRATIGRAPHIC COMPLETENESShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct palaeoenvironments and palaeoclimates. Dune sets are ubiquitous in preserved river deposits and are typically interpreted based on a model that that describes the recurrence of erosion in a vertical sequence, but without consideringspatial variability. However, spatial variability in flow and sediment transport will change the recurrence of erosion, and therefore dune preservation. In order to better understand the limits of these Interpretations and outline the causes of potential variability in preservation potential, this paper reviews existing work and presents new observations of an extreme end-member of dune preservation: ?form-sets?, formed by dunes in which both stoss- and lee- slopes are preserved Intact. These form-sets do not conform to models that are based on the recurrence of erosion, since erosion does not recur in their case, and can therefore be used to evaluate the assumptions that underpin sedimentary preservation. New Ground Penetrating Radar data from the Río Paraná, Argentina, show dune fields that are buried intact within larger scale barforms. These trains of form-sets are up to 300 m in length, are restricted to unit-bar troughs in the upper 5 m of the channel deposits, occur in >5% of the mid-channel bar deposits, show reactivation surfaces, occur in multiple levels, and match the size of average-flow dunes. A review of published accounts of form-sets highlights a diversity of processes that can be envisaged for their formation: i) abandonment after extreme floods, ii) slow burial of abandoned dune forms by cohesive clay in sheltered bar troughs and meander-neck cut-offs, iii) fast burial by mass-movement processes, and iv)climbing of dune sets due to local dominance of deposition over dune migration.Analysis of these new and published accounts of form-sets and their burial processes highlights that form-sets need not be indicative of extreme floods. Instead, form-sets are closely associated with surrounding geomorphology such as river banks, meander-neck cutoffs,and bars because this larger-scale context controls the local sediment budget and the nature of recurrence of erosion. Locally enhanced preservation by the ?extreme? dominance of deposition is further promoted by finer grain sizes and prolonged changes in flow stage. Such conditions are characteristic, although not exclusive, of large lowland rivers such as the Río Paraná. The spatial control on dune preservation is critical: although at-a-point models adequately describe near-horizontal sets of freely migrating dunes in uniform flows, they are unsuitable for inclined dune co-sets and other cases where multiple scales of bedforms interact. Spatial and temporal variations in flow and sediment transport betweenthe thalweg and different positions on larger bar-forms can change the preservation potential of dunes within river channels. Therefore, dune set thickness distributions are likely grouped in larger-scale units that reflect both formative dune geometries and bar-scale variations inpreservation potential. The multi-scale dynamics of preservation highlighted herein also provides a useful comparison for other sedimentary systemsFil: Reesink, Arnold J.. University Of Binghamton; Estados UnidosFil: Van den Berg, J. H.. University of Utrecht; Países BajosFil: Parsons, Daniel R.. University Of Hull; Reino UnidoFil: Amsler, Mario Luis. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Best, James L.. University of Illinois. Urbana - Champaign; Estados UnidosFil: Hardy, Richard J.. University Of Durham; Reino UnidoFil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaFil: Szupiany, Ricardo Nicolas. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; ArgentinaElsevier Science2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26779Reesink, Arnold J.; Van den Berg, J. H.; Parsons, Daniel R.; Amsler, Mario Luis; Best, James L.; et al.; Extremes in dune preservation: controls on the completeness of fluvial deposits; Elsevier Science; Earth-science Reviews; 150; 9-2015; 652-6650012-82521872-6828CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2015.09.008info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S001282521530043Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:36:04Zoai:ri.conicet.gov.ar:11336/26779instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:36:04.872CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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