Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)

The ichnological study of fluvial fan and lacustrine Oligocene deposits in the NE Ebro Basin has allowed the recognition of three ichnoassemblages having a strong correlation with depositional facies associations. Lacustrine deposits lack bioturbation due to the hydrologically closed character of th...

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Autores: Gibert Atienza, Jordi Maria de, Sáez, Alberto
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2009
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/101832
Acceso en línea:https://hdl.handle.net/2445/101832
Access Level:acceso abierto
Palabra clave:Icnologia
Llacs
Oligocè
Conques sedimentàries
Ebre, Depressió de l'
Ichnology
Lakes
Oligocene
Sedimentary basins
Ebro River Watershed (Spain)
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spelling Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)Gibert Atienza, Jordi Maria deSáez, AlbertoIcnologiaLlacsOligocèConques sedimentàriesEbre, Depressió de l'IchnologyLakesOligoceneSedimentary basinsEbro River Watershed (Spain)The ichnological study of fluvial fan and lacustrine Oligocene deposits in the NE Ebro Basin has allowed the recognition of three ichnoassemblages having a strong correlation with depositional facies associations. Lacustrine deposits lack bioturbation due to the hydrologically closed character of the lake that caused hypersalinity and made it inhospitable for benthic life. Terminal lobe deposits of the fluvial fan, which were sedimented in low wetland areas around the lake, bear a moderately diverse ichnoassemblage dominated by horizontal Taenidium barretti, Cochlichnus anguineus and bird footprints (Gruipeda isp.). This assemblage can be assigned to the 'shorebird ichnofacies', a subset of the Scoyenia ichnofacies that characterizes the subaerial part of low-energy shore areas. Crevasse splay deposits in medial fluvial fan areas present a different assemblage also belonging to the Scoyenia ichnofacies. It includes most of the trace fossils found in the terminal lobes, except for the bird tracks, plus very abundant vertical burrows (Taenidium barretti and unnamed ornamented burrows). The presence of deep-tier traces of terrestrial invertebrates is consistent with the more proximal fan setting, having greater relief and consequently a lower mean groundwater position than lowland areas. Fluvial channels only bear irregularly clustered tunnel structures of unknown affinity formed after abandonment of the channel. Thus, trace fossil assemblages are mostly controlled by the position and fluctuations of water tables, which are the cause for their composite nature.Elsevier B.V.2016201620092016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion50 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/101832Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://dx.doi.org/10.1016/j.palaeo.2008.10.030Palaeogeography Palaeoclimatology Palaeoecology, 2009, vol. 272, num. 3-4, p. 162-175http://dx.doi.org/10.1016/j.palaeo.2008.10.030(c) Elsevier B.V., 2009info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1018322026-05-29T05:05:01Z
dc.title.none.fl_str_mv Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
title Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
spellingShingle Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
Gibert Atienza, Jordi Maria de
Icnologia
Llacs
Oligocè
Conques sedimentàries
Ebre, Depressió de l'
Ichnology
Lakes
Oligocene
Sedimentary basins
Ebro River Watershed (Spain)
title_short Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
title_full Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
title_fullStr Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
title_full_unstemmed Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
title_sort Paleohydrological significance of trace fossil distribution in Oligocene fluvial-fan-to-lacustrine systems of the Ebro Basin (Spain)
dc.creator.none.fl_str_mv Gibert Atienza, Jordi Maria de
Sáez, Alberto
author Gibert Atienza, Jordi Maria de
author_facet Gibert Atienza, Jordi Maria de
Sáez, Alberto
author_role author
author2 Sáez, Alberto
author2_role author
dc.subject.none.fl_str_mv Icnologia
Llacs
Oligocè
Conques sedimentàries
Ebre, Depressió de l'
Ichnology
Lakes
Oligocene
Sedimentary basins
Ebro River Watershed (Spain)
topic Icnologia
Llacs
Oligocè
Conques sedimentàries
Ebre, Depressió de l'
Ichnology
Lakes
Oligocene
Sedimentary basins
Ebro River Watershed (Spain)
description The ichnological study of fluvial fan and lacustrine Oligocene deposits in the NE Ebro Basin has allowed the recognition of three ichnoassemblages having a strong correlation with depositional facies associations. Lacustrine deposits lack bioturbation due to the hydrologically closed character of the lake that caused hypersalinity and made it inhospitable for benthic life. Terminal lobe deposits of the fluvial fan, which were sedimented in low wetland areas around the lake, bear a moderately diverse ichnoassemblage dominated by horizontal Taenidium barretti, Cochlichnus anguineus and bird footprints (Gruipeda isp.). This assemblage can be assigned to the 'shorebird ichnofacies', a subset of the Scoyenia ichnofacies that characterizes the subaerial part of low-energy shore areas. Crevasse splay deposits in medial fluvial fan areas present a different assemblage also belonging to the Scoyenia ichnofacies. It includes most of the trace fossils found in the terminal lobes, except for the bird tracks, plus very abundant vertical burrows (Taenidium barretti and unnamed ornamented burrows). The presence of deep-tier traces of terrestrial invertebrates is consistent with the more proximal fan setting, having greater relief and consequently a lower mean groundwater position than lowland areas. Fluvial channels only bear irregularly clustered tunnel structures of unknown affinity formed after abandonment of the channel. Thus, trace fossil assemblages are mostly controlled by the position and fluctuations of water tables, which are the cause for their composite nature.
publishDate 2009
dc.date.none.fl_str_mv 2009
2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/101832
url https://hdl.handle.net/2445/101832
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.palaeo.2008.10.030
Palaeogeography Palaeoclimatology Palaeoecology, 2009, vol. 272, num. 3-4, p. 162-175
http://dx.doi.org/10.1016/j.palaeo.2008.10.030
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2009
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2009
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 50 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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