The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)

The aim of this study is resolving uncertainties on the lithostratigraphy and chronostratigraphy of the non-marine Lower Cretaceous of El Montsec thrust sheet, which contains the most developed record of such facies in the central Pyrenees (Catalonia, Spain). The materials, traditionally known as “E...

ver descrição completa

Detalhes bibliográficos
Autores: Martín-Closas, Carles, Lozano-Fernández, Iván, Pérez Cano, Jordi, Bover-Arnal, Telm
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/223082
Acesso em linha:https://hdl.handle.net/2445/223082
Access Level:acceso abierto
Palavra-chave:Sediments lacustres
Cretaci
Caròfits fòssils
Pirineus
Lake sediments
Cretaceous Period
Fossil charophytes
Pyrenees
id ES_5dd3b8cda3e3220b36995abd3a8a7f8d
oai_identifier_str oai:diposit.ub.edu:2445/223082
network_acronym_str ES
network_name_str España
repository_id_str
spelling The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)Martín-Closas, CarlesLozano-Fernández, IvánPérez Cano, JordiBover-Arnal, TelmSediments lacustresCretaciCaròfits fòssilsPirineusLake sedimentsCretaceous PeriodFossil charophytesPyreneesThe aim of this study is resolving uncertainties on the lithostratigraphy and chronostratigraphy of the non-marine Lower Cretaceous of El Montsec thrust sheet, which contains the most developed record of such facies in the central Pyrenees (Catalonia, Spain). The materials, traditionally known as “El Montsec Charophyte Limestones”, overlie upper Berriasian marine limestones and belong in fact to two different stratigraphic units, separated by an angular unconformity, which is represented by an irregular karstic surface. The lower unit, newly defined as the Cova dels Lladres Intraclastic Limestone Formation, is composed by metric-scale fining-upward parasequences with black intraclast conglomerates at the base overed by charophyte limestones at the top. This first nonmarine unit is attributed to the lower Barremian Eurasian charophyte biozone Atopochara trivolvis triquetra. The upper non-marine unit, (revisited El Montsec Charophyte Limestone), is made of metric-scale fining-upward parasequences of charophyte limestones. Ferruginous marls at the base of the upper unit have yielded charophytes of the Hemiclavator neimongolensis neimongolensis Eurasian charophyte biozone, corresponding to the early–late Barremian boundary. El Montsec Charophyte Limestone Formation transitions laterally to La Pedrera de Rúbies Lithographic Limestones Formation, which includes the two famous fossil Konservat Lagerstätten of La Pedrera de Meià and La Cabroa. In sum, the non-marine Lower Cretaceous succession of El Montsec thrust sheet shows at its base a stratigraphic gap ranging from the upper Berriasian to the early Barremian. Furthermore, the angular unconformity separating the Cova dels Lladres Formation and El Montsec Formation clearly reflects the strong tectonic activity associated with the Barremian Iberian rift, which has been linked with the opening of the Bay of Biscay.(UB). (ICTJA). (IDEA). (UAB). (CSIC)2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/223082Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/https://doi.org/10.1344/GeologicaActa2025.23.7Geologica Acta, 2025, vol. 23, p. 1-17https://doi.org/https://doi.org/10.1344/GeologicaActa2025.23.7cc-by-sa (c) Martín-Closas, C. et al., 2025http://creativecommons.org/licenses/by-sa/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2230822026-05-27T06:46:51Z
dc.title.none.fl_str_mv The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
title The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
spellingShingle The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
Martín-Closas, Carles
Sediments lacustres
Cretaci
Caròfits fòssils
Pirineus
Lake sediments
Cretaceous Period
Fossil charophytes
Pyrenees
title_short The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
title_full The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
title_fullStr The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
title_full_unstemmed The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
title_sort The non-marine Lower Cretaceous of El Montsec thrust-sheet (South-Central Pyrenees)
dc.creator.none.fl_str_mv Martín-Closas, Carles
Lozano-Fernández, Iván
Pérez Cano, Jordi
Bover-Arnal, Telm
author Martín-Closas, Carles
author_facet Martín-Closas, Carles
Lozano-Fernández, Iván
Pérez Cano, Jordi
Bover-Arnal, Telm
author_role author
author2 Lozano-Fernández, Iván
Pérez Cano, Jordi
Bover-Arnal, Telm
author2_role author
author
author
dc.subject.none.fl_str_mv Sediments lacustres
Cretaci
Caròfits fòssils
Pirineus
Lake sediments
Cretaceous Period
Fossil charophytes
Pyrenees
topic Sediments lacustres
Cretaci
Caròfits fòssils
Pirineus
Lake sediments
Cretaceous Period
Fossil charophytes
Pyrenees
description The aim of this study is resolving uncertainties on the lithostratigraphy and chronostratigraphy of the non-marine Lower Cretaceous of El Montsec thrust sheet, which contains the most developed record of such facies in the central Pyrenees (Catalonia, Spain). The materials, traditionally known as “El Montsec Charophyte Limestones”, overlie upper Berriasian marine limestones and belong in fact to two different stratigraphic units, separated by an angular unconformity, which is represented by an irregular karstic surface. The lower unit, newly defined as the Cova dels Lladres Intraclastic Limestone Formation, is composed by metric-scale fining-upward parasequences with black intraclast conglomerates at the base overed by charophyte limestones at the top. This first nonmarine unit is attributed to the lower Barremian Eurasian charophyte biozone Atopochara trivolvis triquetra. The upper non-marine unit, (revisited El Montsec Charophyte Limestone), is made of metric-scale fining-upward parasequences of charophyte limestones. Ferruginous marls at the base of the upper unit have yielded charophytes of the Hemiclavator neimongolensis neimongolensis Eurasian charophyte biozone, corresponding to the early–late Barremian boundary. El Montsec Charophyte Limestone Formation transitions laterally to La Pedrera de Rúbies Lithographic Limestones Formation, which includes the two famous fossil Konservat Lagerstätten of La Pedrera de Meià and La Cabroa. In sum, the non-marine Lower Cretaceous succession of El Montsec thrust sheet shows at its base a stratigraphic gap ranging from the upper Berriasian to the early Barremian. Furthermore, the angular unconformity separating the Cova dels Lladres Formation and El Montsec Formation clearly reflects the strong tectonic activity associated with the Barremian Iberian rift, which has been linked with the opening of the Bay of Biscay.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/223082
url https://hdl.handle.net/2445/223082
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/https://doi.org/10.1344/GeologicaActa2025.23.7
Geologica Acta, 2025, vol. 23, p. 1-17
https://doi.org/https://doi.org/10.1344/GeologicaActa2025.23.7
dc.rights.none.fl_str_mv cc-by-sa (c) Martín-Closas, C. et al., 2025
http://creativecommons.org/licenses/by-sa/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-sa (c) Martín-Closas, C. et al., 2025
http://creativecommons.org/licenses/by-sa/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv (UB). (ICTJA). (IDEA). (UAB). (CSIC)
publisher.none.fl_str_mv (UB). (ICTJA). (IDEA). (UAB). (CSIC)
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409057394130944
score 15.812455

Registos relacionados