Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere su...

Autores
Schwarz, Ernesto; Khan, Zishann A.; Arnott, R. William C.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Well-exposed, periglacial slope deposits in the Neoproterozoic Isaac Formation allow channel-fill and genetically-related overbank elements to be studied in detail. The key to genetically linking these stratal elements is the occurrence of muddy turbidites interbedded with discontinuous thin granule conglomerate and dune-cross-stratified sandstone within overbank deposits. These strata drape a low-relief erosion surface (<1.5 m deep) that occurs at a slightly higher stratigraphic level than the base of the adjacent channel-fill. Both these surfaces are interpreted to represent erosion and bypass by energetic flows during channel initiation. Once initiated, most flows bypassed the channel but also spilled out onto the surrounding overbank area, depositing incomplete and complete Bouma sequences (levee element). The upward-fining and -thinning trend observed in many levee elements suggests that levee aggradation progressively increased channel confinement, restricting overspilling to the uppermost dilute parts of flows. Changes in flow conditions triggered early filling of the channel by sand/granule-rich, high-concentration flows (amalgamated Ta divisions) with minor overspill onto the levee. Latest stage of channel infill is always characterized by thin-bedded deposits suggesting deposition from low-energy, dilute flows (abandonment element). This evolution is repeated several times in Isaac Formation strata producing vertically stacked channel-fill elements separated by abandonment elements, and surrounded by genetically-related levee elements. The fact that the abandonment element described here is not traceable into the adjacent levee element, but onlaps it, differs from previous outcrop-based examples and resembles more the configuration observed in several well-imaged, subsurface examples in which inner levee elements onlap interpreted outer levee elements.
Fil: Schwarz, Ernesto. University of Ottawa. Faculty of Science; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Khan, Zishann A.. University of Ottawa. Faculty of Science; Canadá
Fil: Arnott, R. William C.. University of Ottawa. Faculty of Science; Canadá
AAPG Annual Convention and Exhibition
Long Beach
Estados Unidos
American Association of Petroleum Geology
Materia
Channel-Overbank Interactions
Deep-Marine Slope Settings
Architectural Analysis
Neoproterozoic Isaac Formation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/237452
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian CordilleraSchwarz, ErnestoKhan, Zishann A.Arnott, R. William C.Channel-Overbank InteractionsDeep-Marine Slope SettingsArchitectural AnalysisNeoproterozoic Isaac Formationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Well-exposed, periglacial slope deposits in the Neoproterozoic Isaac Formation allow channel-fill and genetically-related overbank elements to be studied in detail. The key to genetically linking these stratal elements is the occurrence of muddy turbidites interbedded with discontinuous thin granule conglomerate and dune-cross-stratified sandstone within overbank deposits. These strata drape a low-relief erosion surface (<1.5 m deep) that occurs at a slightly higher stratigraphic level than the base of the adjacent channel-fill. Both these surfaces are interpreted to represent erosion and bypass by energetic flows during channel initiation. Once initiated, most flows bypassed the channel but also spilled out onto the surrounding overbank area, depositing incomplete and complete Bouma sequences (levee element). The upward-fining and -thinning trend observed in many levee elements suggests that levee aggradation progressively increased channel confinement, restricting overspilling to the uppermost dilute parts of flows. Changes in flow conditions triggered early filling of the channel by sand/granule-rich, high-concentration flows (amalgamated Ta divisions) with minor overspill onto the levee. Latest stage of channel infill is always characterized by thin-bedded deposits suggesting deposition from low-energy, dilute flows (abandonment element). This evolution is repeated several times in Isaac Formation strata producing vertically stacked channel-fill elements separated by abandonment elements, and surrounded by genetically-related levee elements. The fact that the abandonment element described here is not traceable into the adjacent levee element, but onlaps it, differs from previous outcrop-based examples and resembles more the configuration observed in several well-imaged, subsurface examples in which inner levee elements onlap interpreted outer levee elements.Fil: Schwarz, Ernesto. University of Ottawa. Faculty of Science; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Khan, Zishann A.. University of Ottawa. Faculty of Science; CanadáFil: Arnott, R. William C.. University of Ottawa. Faculty of Science; CanadáAAPG Annual Convention and ExhibitionLong BeachEstados UnidosAmerican Association of Petroleum GeologyAmerican Association of Petroleum Geology2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/237452Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera; AAPG Annual Convention and Exhibition; Long Beach; Estados Unidos; 2007; 1-1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.searchanddiscovery.com/abstracts/html/2007/annual/abstracts/lbSchwarz2.htmInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:10Zoai:ri.conicet.gov.ar:11336/237452instacron: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:34982025-09-29 09:48:10.873CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
title Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
spellingShingle Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
Schwarz, Ernesto
Channel-Overbank Interactions
Deep-Marine Slope Settings
Architectural Analysis
Neoproterozoic Isaac Formation
title_short Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
title_full Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
title_fullStr Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
title_full_unstemmed Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
title_sort Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera
dc.creator.none.fl_str_mv Schwarz, Ernesto
Khan, Zishann A.
Arnott, R. William C.
author Schwarz, Ernesto
author_facet Schwarz, Ernesto
Khan, Zishann A.
Arnott, R. William C.
author_role author
author2 Khan, Zishann A.
Arnott, R. William C.
author2_role author
author
dc.subject.none.fl_str_mv Channel-Overbank Interactions
Deep-Marine Slope Settings
Architectural Analysis
Neoproterozoic Isaac Formation
topic Channel-Overbank Interactions
Deep-Marine Slope Settings
Architectural Analysis
Neoproterozoic Isaac Formation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Well-exposed, periglacial slope deposits in the Neoproterozoic Isaac Formation allow channel-fill and genetically-related overbank elements to be studied in detail. The key to genetically linking these stratal elements is the occurrence of muddy turbidites interbedded with discontinuous thin granule conglomerate and dune-cross-stratified sandstone within overbank deposits. These strata drape a low-relief erosion surface (<1.5 m deep) that occurs at a slightly higher stratigraphic level than the base of the adjacent channel-fill. Both these surfaces are interpreted to represent erosion and bypass by energetic flows during channel initiation. Once initiated, most flows bypassed the channel but also spilled out onto the surrounding overbank area, depositing incomplete and complete Bouma sequences (levee element). The upward-fining and -thinning trend observed in many levee elements suggests that levee aggradation progressively increased channel confinement, restricting overspilling to the uppermost dilute parts of flows. Changes in flow conditions triggered early filling of the channel by sand/granule-rich, high-concentration flows (amalgamated Ta divisions) with minor overspill onto the levee. Latest stage of channel infill is always characterized by thin-bedded deposits suggesting deposition from low-energy, dilute flows (abandonment element). This evolution is repeated several times in Isaac Formation strata producing vertically stacked channel-fill elements separated by abandonment elements, and surrounded by genetically-related levee elements. The fact that the abandonment element described here is not traceable into the adjacent levee element, but onlaps it, differs from previous outcrop-based examples and resembles more the configuration observed in several well-imaged, subsurface examples in which inner levee elements onlap interpreted outer levee elements.
Fil: Schwarz, Ernesto. University of Ottawa. Faculty of Science; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Khan, Zishann A.. University of Ottawa. Faculty of Science; Canadá
Fil: Arnott, R. William C.. University of Ottawa. Faculty of Science; Canadá
AAPG Annual Convention and Exhibition
Long Beach
Estados Unidos
American Association of Petroleum Geology
description Well-exposed, periglacial slope deposits in the Neoproterozoic Isaac Formation allow channel-fill and genetically-related overbank elements to be studied in detail. The key to genetically linking these stratal elements is the occurrence of muddy turbidites interbedded with discontinuous thin granule conglomerate and dune-cross-stratified sandstone within overbank deposits. These strata drape a low-relief erosion surface (<1.5 m deep) that occurs at a slightly higher stratigraphic level than the base of the adjacent channel-fill. Both these surfaces are interpreted to represent erosion and bypass by energetic flows during channel initiation. Once initiated, most flows bypassed the channel but also spilled out onto the surrounding overbank area, depositing incomplete and complete Bouma sequences (levee element). The upward-fining and -thinning trend observed in many levee elements suggests that levee aggradation progressively increased channel confinement, restricting overspilling to the uppermost dilute parts of flows. Changes in flow conditions triggered early filling of the channel by sand/granule-rich, high-concentration flows (amalgamated Ta divisions) with minor overspill onto the levee. Latest stage of channel infill is always characterized by thin-bedded deposits suggesting deposition from low-energy, dilute flows (abandonment element). This evolution is repeated several times in Isaac Formation strata producing vertically stacked channel-fill elements separated by abandonment elements, and surrounded by genetically-related levee elements. The fact that the abandonment element described here is not traceable into the adjacent levee element, but onlaps it, differs from previous outcrop-based examples and resembles more the configuration observed in several well-imaged, subsurface examples in which inner levee elements onlap interpreted outer levee elements.
publishDate 2007
dc.date.none.fl_str_mv 2007
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/237452
Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera; AAPG Annual Convention and Exhibition; Long Beach; Estados Unidos; 2007; 1-1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/237452
identifier_str_mv Understanding channel-overbank interactions in deep-marine slope settings: Architectural analysis of channel and levee elements in the Neoproterozoic Isaac Formation (Windermere supergroup), Southern Canadian Cordillera; AAPG Annual Convention and Exhibition; Long Beach; Estados Unidos; 2007; 1-1
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.searchanddiscovery.com/abstracts/html/2007/annual/abstracts/lbSchwarz2.htm
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
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv American Association of Petroleum Geology
publisher.none.fl_str_mv American Association of Petroleum Geology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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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score 13.070432

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