Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces

The origin and morpho-stratigraphic evolution of the largest playa-lake system (La Playa-El Pueyo) in the Bujaraloz-Sástago endorheic area, located in the semiarid central sector of the Ebro Depression, are analysed. The enclosed depressions are developed on gypsiferous Tertiary bedrock and show a p...

ver descrição completa

Detalhes bibliográficos
Autores: Gutiérrez, Francisco Javier, Valero-Garcés, Bias L., Desir, Gloria, González-Sampériz, Penélope, García Gutiérrez, Mateo del Camino, Linares Santiago, Rogelio, Zarroca, Mario, Moreno, Ana, Guerrero, Jesús M., Roqué i Pau, Carles, Arnold, Lee James, Demuro, Martina
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Recursos: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:10256/15965
Acesso em linha:http://hdl.handle.net/10256/15965
Access Level:acceso abierto
Palavra-chave:Geofísica
Geophysics
Paleohidrologia -- Holocè
Paleohydrology -- Holocene
id ES_c5063d6ecc2cd3a791ac37d3d0e06d73
oai_identifier_str oai:recercat.cat:10256/15965
network_acronym_str ES
network_name_str España
repository_id_str
spelling Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terracesGutiérrez, Francisco JavierValero-Garcés, Bias L.Desir, GloriaGonzález-Sampériz, PenélopeGarcía Gutiérrez, Mateo del CaminoLinares Santiago, RogelioZarroca, MarioMoreno, AnaGuerrero, Jesús M.Roqué i Pau, CarlesArnold, Lee JamesDemuro, MartinaGeofísicaGeophysicsPaleohidrologia -- HolocèPaleohydrology -- HoloceneThe origin and morpho-stratigraphic evolution of the largest playa-lake system (La Playa-El Pueyo) in the Bujaraloz-Sástago endorheic area, located in the semiarid central sector of the Ebro Depression, are analysed. The enclosed depressions are developed on gypsiferous Tertiary bedrock and show a prevalent WNW-ESE orientation parallel to the direction of the prevalent strong local wind (Cierzo). Yardangs have been carved in bedrock and unconsolidated terrace deposits in the leeward sector of the largest lake basins. A sequence of three lacustrine terrace levels has been identified by detailed geomorphological mapping. The treads of the upper, middle and lower terrace levels are situated at +. 9. m, +. 6. m and +. 0.5. m above the playa-lake floors, respectively. Seismic refraction and electrical resistivity profiles acquired in La Playa reveal a thin basin fill (~. 2. m) with a planar base. These data allow ruling out the genetic hypothesis for the depressions involving the collapse of large bedrock cavities and support a mixed genesis of combined widespread dissolution and subsidence by groundwater discharge and eolian deflation during dry periods. The 5. m thick deposit of the middle terrace was investigated in hand-dug and backhoe trenches. Six AMS radiocarbon ages from this terrace indicate an aggradation phase between 3.9. ka and ca. 2. ka. These numerical ages yield a maximum average aggradation rate of 2.6. mm/yr and a minimum excavation rate by wind deflation of 3. mm/yr subsequent to the accumulation of the middle terrace. The latter figure compares well with those calculated in several arid regions of the world using yardangs carved in palaeolake deposits. The aggradation phase between 4 and 2. ka is coherent with other Iberian and Mediterranean records showing relatively more humid conditions after 4. ka, including the Iron Ages and the Iberian-Roman PeriodThis research work has been funded by the national projects CGL2005-02404, CGL2010-16775 (Ministerio de Ciencia e Innovación and FEDER), CGL2009-07992 (DINAMO), CGL2009-08415 (GLOBALKARST) and the GRACCIE-CONSOLIDER INGENIO 2010 (CSD2007-00067)ElsevierMinisterio de Educación y Ciencia (Espanya)Ministerio de Ciencia e Innovación (Espanya)2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionpeer-reviewedapplication/pdfhttp://hdl.handle.net/10256/15965http://hdl.handle.net/10256/15965© Geomorphology, 2013, vol. 196, p. 177-197Articles publicats (D-CCAA)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2012.02.013info:eu-repo/semantics/altIdentifier/issn/0169-555XMEC/PN 2005-2008/CGL2005-02404info:eu-repo/grantAgreement/MICINN//CGL2010-16775Tots els drets reservatsinfo:eu-repo/semantics/openAccessoai:recercat.cat:10256/159652026-05-29T05:05:01Z
dc.title.none.fl_str_mv Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
title Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
spellingShingle Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
Gutiérrez, Francisco Javier
Geofísica
Geophysics
Paleohidrologia -- Holocè
Paleohydrology -- Holocene
title_short Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
title_full Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
title_fullStr Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
title_full_unstemmed Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
title_sort Late Holocene evolution of playa lakes in the central Ebro depression based on geophysical surveys and morpho-stratigraphic analysis of lacustrine terraces
dc.creator.none.fl_str_mv Gutiérrez, Francisco Javier
Valero-Garcés, Bias L.
Desir, Gloria
González-Sampériz, Penélope
García Gutiérrez, Mateo del Camino
Linares Santiago, Rogelio
Zarroca, Mario
Moreno, Ana
Guerrero, Jesús M.
Roqué i Pau, Carles
Arnold, Lee James
Demuro, Martina
author Gutiérrez, Francisco Javier
author_facet Gutiérrez, Francisco Javier
Valero-Garcés, Bias L.
Desir, Gloria
González-Sampériz, Penélope
García Gutiérrez, Mateo del Camino
Linares Santiago, Rogelio
Zarroca, Mario
Moreno, Ana
Guerrero, Jesús M.
Roqué i Pau, Carles
Arnold, Lee James
Demuro, Martina
author_role author
author2 Valero-Garcés, Bias L.
Desir, Gloria
González-Sampériz, Penélope
García Gutiérrez, Mateo del Camino
Linares Santiago, Rogelio
Zarroca, Mario
Moreno, Ana
Guerrero, Jesús M.
Roqué i Pau, Carles
Arnold, Lee James
Demuro, Martina
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Educación y Ciencia (Espanya)
Ministerio de Ciencia e Innovación (Espanya)
dc.subject.none.fl_str_mv Geofísica
Geophysics
Paleohidrologia -- Holocè
Paleohydrology -- Holocene
topic Geofísica
Geophysics
Paleohidrologia -- Holocè
Paleohydrology -- Holocene
description The origin and morpho-stratigraphic evolution of the largest playa-lake system (La Playa-El Pueyo) in the Bujaraloz-Sástago endorheic area, located in the semiarid central sector of the Ebro Depression, are analysed. The enclosed depressions are developed on gypsiferous Tertiary bedrock and show a prevalent WNW-ESE orientation parallel to the direction of the prevalent strong local wind (Cierzo). Yardangs have been carved in bedrock and unconsolidated terrace deposits in the leeward sector of the largest lake basins. A sequence of three lacustrine terrace levels has been identified by detailed geomorphological mapping. The treads of the upper, middle and lower terrace levels are situated at +. 9. m, +. 6. m and +. 0.5. m above the playa-lake floors, respectively. Seismic refraction and electrical resistivity profiles acquired in La Playa reveal a thin basin fill (~. 2. m) with a planar base. These data allow ruling out the genetic hypothesis for the depressions involving the collapse of large bedrock cavities and support a mixed genesis of combined widespread dissolution and subsidence by groundwater discharge and eolian deflation during dry periods. The 5. m thick deposit of the middle terrace was investigated in hand-dug and backhoe trenches. Six AMS radiocarbon ages from this terrace indicate an aggradation phase between 3.9. ka and ca. 2. ka. These numerical ages yield a maximum average aggradation rate of 2.6. mm/yr and a minimum excavation rate by wind deflation of 3. mm/yr subsequent to the accumulation of the middle terrace. The latter figure compares well with those calculated in several arid regions of the world using yardangs carved in palaeolake deposits. The aggradation phase between 4 and 2. ka is coherent with other Iberian and Mediterranean records showing relatively more humid conditions after 4. ka, including the Iron Ages and the Iberian-Roman Period
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
peer-reviewed
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10256/15965
http://hdl.handle.net/10256/15965
url http://hdl.handle.net/10256/15965
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2012.02.013
info:eu-repo/semantics/altIdentifier/issn/0169-555X
MEC/PN 2005-2008/CGL2005-02404
info:eu-repo/grantAgreement/MICINN//CGL2010-16775
dc.rights.none.fl_str_mv Tots els drets reservats
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Tots els drets reservats
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv © Geomorphology, 2013, vol. 196, p. 177-197
Articles publicats (D-CCAA)
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
_version_ 1869418952759705600
score 15,812429

Registos relacionados