Large bedforms on contourite terraces: Sedimentary and conceptual implications

While bedforms are increasingly being recognized and analyzed in bathymetric and seismic data sets, exact mechanisms for the formation of large bedforms are not well understood. This paper describes a suite of Paleocene to Miocene bedforms found along a series of contourite terraces that compose the...

Descripción completa

Detalles Bibliográficos
Autores: Hernández-Molina, F. J., Campbell, S., Badalini, Gianluca, Thompson, P., Walker, R., Soto, M., Conti, B., Preu, B., Thieblemont, A., Hyslop, L., Miramontes, E., Morales, E.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/377538
Acceso en línea:http://hdl.handle.net/10261/377538
Access Level:acceso abierto
Palabra clave:Deposits
Seismology
Stratigraphy
id ES_aabc1066cea6d8a7736fcbf925eb1600
oai_identifier_str oai:digital.csic.es:10261/377538
network_acronym_str ES
network_name_str España
repository_id_str
spelling Large bedforms on contourite terraces: Sedimentary and conceptual implicationsHernández-Molina, F. J.Campbell, S.Badalini, GianlucaThompson, P.Walker, R.Soto, M.Conti, B.Preu, B.Thieblemont, A.Hyslop, L.Miramontes, E.Morales, E.DepositsSeismologyStratigraphyWhile bedforms are increasingly being recognized and analyzed in bathymetric and seismic data sets, exact mechanisms for the formation of large bedforms are not well understood. This paper describes a suite of Paleocene to Miocene bedforms found along a series of contourite terraces that compose the Uruguayan continental slope. Results are compared with similar bedforms found along other continental margins. This study describes diagnostic, large-scale features associated with major discontinuities, including channels, scours, furrows, sand ribbons, and barchan dunes. These record periods of increased bottom current activity and thus represent distinct paleoceanographic markers within the basin. Sequences of layered, muddy two-dimensional dune-like bedforms also commonly occur between discontinuities. The vertical bedform distribution exhibits a repetitive pattern generated by bottom currents, with sediment supply from simultaneous downslope processes deposited primarily over discontinuous intervals. Sediment reworking and redistribution along slope by bottom currents generated thick, extensive sand-rich deposits concentrated at particular locations. These features raise fundamental questions concerning margin processes, morphologies, stratigraphic context, and bedform development in deep-marine environments. Given their role in paleoceanographic reconstructions and resource exploration, these deposits and the mechanisms that form them require more formal understanding.The authors would like to thank ANCAP, British Gas Group, and Shell for permission to use unpublished seismic data sets. The research was supported through the Spanish Ciencia y Tecnologías Marinas projects CTM 2012-39599-C03, CGL2016-80445-R, and CTM2016-75129-C3-1-R, and the Uruguayan ANCAP-UDELAR Nº 21 project; and conducted in the framework of “The Drifters” research group of the Royal Holloway University of London (RHUL).Peer reviewedGeological Society of AmericaMinisterio de Ciencia y Tecnología (España)University of LondonUniversité de BordeauxRoyal Holloway, University of LondonConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/377538reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//CTM2012-39599-C03-02info:eu-repo/grantAgreement/MINECO//CTM2012-39599-C03-03info:eu-repo/grantAgreement/AEI//CGL2016-80445-Rinfo:eu-repo/grantAgreement/AEI//CTM2016-75129-C3-1-Rhttps://doi.org/10.1130/G39655.1Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3775382026-05-22T06:33:51Z
dc.title.none.fl_str_mv Large bedforms on contourite terraces: Sedimentary and conceptual implications
title Large bedforms on contourite terraces: Sedimentary and conceptual implications
spellingShingle Large bedforms on contourite terraces: Sedimentary and conceptual implications
Hernández-Molina, F. J.
Deposits
Seismology
Stratigraphy
title_short Large bedforms on contourite terraces: Sedimentary and conceptual implications
title_full Large bedforms on contourite terraces: Sedimentary and conceptual implications
title_fullStr Large bedforms on contourite terraces: Sedimentary and conceptual implications
title_full_unstemmed Large bedforms on contourite terraces: Sedimentary and conceptual implications
title_sort Large bedforms on contourite terraces: Sedimentary and conceptual implications
dc.creator.none.fl_str_mv Hernández-Molina, F. J.
Campbell, S.
Badalini, Gianluca
Thompson, P.
Walker, R.
Soto, M.
Conti, B.
Preu, B.
Thieblemont, A.
Hyslop, L.
Miramontes, E.
Morales, E.
author Hernández-Molina, F. J.
author_facet Hernández-Molina, F. J.
Campbell, S.
Badalini, Gianluca
Thompson, P.
Walker, R.
Soto, M.
Conti, B.
Preu, B.
Thieblemont, A.
Hyslop, L.
Miramontes, E.
Morales, E.
author_role author
author2 Campbell, S.
Badalini, Gianluca
Thompson, P.
Walker, R.
Soto, M.
Conti, B.
Preu, B.
Thieblemont, A.
Hyslop, L.
Miramontes, E.
Morales, E.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia y Tecnología (España)
University of London
Université de Bordeaux
Royal Holloway, University of London
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Deposits
Seismology
Stratigraphy
topic Deposits
Seismology
Stratigraphy
description While bedforms are increasingly being recognized and analyzed in bathymetric and seismic data sets, exact mechanisms for the formation of large bedforms are not well understood. This paper describes a suite of Paleocene to Miocene bedforms found along a series of contourite terraces that compose the Uruguayan continental slope. Results are compared with similar bedforms found along other continental margins. This study describes diagnostic, large-scale features associated with major discontinuities, including channels, scours, furrows, sand ribbons, and barchan dunes. These record periods of increased bottom current activity and thus represent distinct paleoceanographic markers within the basin. Sequences of layered, muddy two-dimensional dune-like bedforms also commonly occur between discontinuities. The vertical bedform distribution exhibits a repetitive pattern generated by bottom currents, with sediment supply from simultaneous downslope processes deposited primarily over discontinuous intervals. Sediment reworking and redistribution along slope by bottom currents generated thick, extensive sand-rich deposits concentrated at particular locations. These features raise fundamental questions concerning margin processes, morphologies, stratigraphic context, and bedform development in deep-marine environments. Given their role in paleoceanographic reconstructions and resource exploration, these deposits and the mechanisms that form them require more formal understanding.
publishDate 2018
dc.date.none.fl_str_mv 2018
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/377538
url http://hdl.handle.net/10261/377538
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO//CTM2012-39599-C03-02
info:eu-repo/grantAgreement/MINECO//CTM2012-39599-C03-03
info:eu-repo/grantAgreement/AEI//CGL2016-80445-R
info:eu-repo/grantAgreement/AEI//CTM2016-75129-C3-1-R
https://doi.org/10.1130/G39655.1
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869416207486025728
score 15.812429

Similares en LA Referencia