Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance...

Autores
Krahl, Guilherme; Concheyro, Graciela; Bom, Marlone H. H.; Guerra, Rodrigo M.; Kochhann, Karlos G. D.; Bauersachs, Thorsten; Schwark, Lorenz; Ceolin, Daiane; Musso, Telma Belén; Fauth, Gerson
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Maastrichtian–Danian time interval corresponds to one of the largest mass extinctions in theEarth’s geological history. We investigate changes in planktic foraminiferal assemblages and TEXH86-based sea surface temperatures (SSTs), which reflect surface water conditions, across the Maastrichtian–Danian transition at the Cerro Azul section in the Neuquén Basin, Argentina. Within the Maastrichtian, we identify species that became extinct at the Cretaceous–Paleogene (K–Pg) boundary, such as Planoheterohelix globulosa and Muricohedbergella monmouthensis, even though these taxa are not typically employed as biostratigraphic markers.Dominance of guembelitrids, usually characterised as opportunistic taxa, is recognised in the upper Maastrichtian interval and within the first 35 cm of the lower Danian, suggesting broad instability in the water column across the K–Pg boundary. Within the lower Danian, two planktic foraminiferal biozones, with high-latitude paleogeographic affinities, were recognised. The AP0 zone was recognised for the lowermost 45 cm above the K–Pgboundary, within the partial range of Turborotalina nikolasi. The first occurrence of Globoconusa daubjergensis, 45 cm above the K–Pg boundary, defines the base of subzone AP1a, which extends towards the top of the studied interval (90 cm above the K–Pg boundary). The planktic foraminiferal fauna recovered from the early Danian interval exhibits a strong affinity to high latitudes, as evidenced by the presence of Antarcticella pauciloculata.However, at 45 cm above the K–Pg boundary (biozone AP1a), a slight increase in the abundanceand/or appearance of tropical and/or subtropical species (Woodringina claytonensis) is observed, suggesting an increase in surface water temperature (SST). This coincides with the trend recorded by TEXH 86, which showsa 1.5 °C rise in SST above 45 cm into the Danian interval at the Cerro Azul section. Our assessment of planktic foraminiferal assemblages suggests that the Cerro Azul section comprises a continuous record of the Maastrichtian and early Danian time interval in the Southern Hemisphere. Additionally, a typical distribution pattern across the K–Pg boundary is observed, with the bloom of opportunist taxa. The middle- to high-latitude paleobiogeographic affinity observed at the beginning of the Danian period for planktonic foraminiferal assemblagesfrom the Cerro Azul section is based on the occurrence of Antarcticella pauciloculata, which has itspaleobiogeographic range in the South Atlantic Ocean extended to mid-latitudes.
Fil: Krahl, Guilherme. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Bom, Marlone H. H.. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Guerra, Rodrigo M.. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Kochhann, Karlos G. D.. Geomar-Helmholtz Centre for Ocean Research Kiel; Alemania
Fil: Bauersachs, Thorsten. No especifíca;
Fil: Schwark, Lorenz. No especifíca;
Fil: Ceolin, Daiane. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Musso, Telma Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas. Universidad Nacional del Comahue. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas; Argentina
Fil: Fauth, Gerson. Universidad de Vale do Rio dos Sinos; Brasil
Materia
Micropaleontology
K/Pg boundary of Argentina
Planktic foraminifera
Neuquina Basin
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/290087
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significanceKrahl, GuilhermeConcheyro, GracielaBom, Marlone H. H.Guerra, Rodrigo M.Kochhann, Karlos G. D.Bauersachs, ThorstenSchwark, LorenzCeolin, DaianeMusso, Telma BelénFauth, GersonMicropaleontologyK/Pg boundary of ArgentinaPlanktic foraminiferaNeuquina Basinhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Maastrichtian–Danian time interval corresponds to one of the largest mass extinctions in theEarth’s geological history. We investigate changes in planktic foraminiferal assemblages and TEXH86-based sea surface temperatures (SSTs), which reflect surface water conditions, across the Maastrichtian–Danian transition at the Cerro Azul section in the Neuquén Basin, Argentina. Within the Maastrichtian, we identify species that became extinct at the Cretaceous–Paleogene (K–Pg) boundary, such as Planoheterohelix globulosa and Muricohedbergella monmouthensis, even though these taxa are not typically employed as biostratigraphic markers.Dominance of guembelitrids, usually characterised as opportunistic taxa, is recognised in the upper Maastrichtian interval and within the first 35 cm of the lower Danian, suggesting broad instability in the water column across the K–Pg boundary. Within the lower Danian, two planktic foraminiferal biozones, with high-latitude paleogeographic affinities, were recognised. The AP0 zone was recognised for the lowermost 45 cm above the K–Pgboundary, within the partial range of Turborotalina nikolasi. The first occurrence of Globoconusa daubjergensis, 45 cm above the K–Pg boundary, defines the base of subzone AP1a, which extends towards the top of the studied interval (90 cm above the K–Pg boundary). The planktic foraminiferal fauna recovered from the early Danian interval exhibits a strong affinity to high latitudes, as evidenced by the presence of Antarcticella pauciloculata.However, at 45 cm above the K–Pg boundary (biozone AP1a), a slight increase in the abundanceand/or appearance of tropical and/or subtropical species (Woodringina claytonensis) is observed, suggesting an increase in surface water temperature (SST). This coincides with the trend recorded by TEXH 86, which showsa 1.5 °C rise in SST above 45 cm into the Danian interval at the Cerro Azul section. Our assessment of planktic foraminiferal assemblages suggests that the Cerro Azul section comprises a continuous record of the Maastrichtian and early Danian time interval in the Southern Hemisphere. Additionally, a typical distribution pattern across the K–Pg boundary is observed, with the bloom of opportunist taxa. The middle- to high-latitude paleobiogeographic affinity observed at the beginning of the Danian period for planktonic foraminiferal assemblagesfrom the Cerro Azul section is based on the occurrence of Antarcticella pauciloculata, which has itspaleobiogeographic range in the South Atlantic Ocean extended to mid-latitudes.Fil: Krahl, Guilherme. Universidad de Vale do Rio dos Sinos; BrasilFil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Bom, Marlone H. H.. Universidad de Vale do Rio dos Sinos; BrasilFil: Guerra, Rodrigo M.. Universidad de Vale do Rio dos Sinos; BrasilFil: Kochhann, Karlos G. D.. Geomar-Helmholtz Centre for Ocean Research Kiel; AlemaniaFil: Bauersachs, Thorsten. No especifíca;Fil: Schwark, Lorenz. No especifíca;Fil: Ceolin, Daiane. Universidad de Vale do Rio dos Sinos; BrasilFil: Musso, Telma Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas. Universidad Nacional del Comahue. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas; ArgentinaFil: Fauth, Gerson. Universidad de Vale do Rio dos Sinos; BrasilCopernicus Publications2026-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/290087Krahl, Guilherme; Concheyro, Graciela; Bom, Marlone H. H.; Guerra, Rodrigo M.; Kochhann, Karlos G. D.; et al.; Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance; Copernicus Publications; Journal of Micropalaeontology; 45; 1; 4-2026; 297-3082041-4978CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://jm.copernicus.org/articles/45/297/2026/info:eu-repo/semantics/altIdentifier/doi/10.5194/jm-45-297-2026info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:46:28Zoai:ri.conicet.gov.ar:11336/290087instacron: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:34982026-08-25 15:46:29.162CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
title Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
spellingShingle Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
Krahl, Guilherme
Micropaleontology
K/Pg boundary of Argentina
Planktic foraminifera
Neuquina Basin
title_short Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
title_full Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
title_fullStr Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
title_full_unstemmed Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
title_sort Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance
dc.creator.none.fl_str_mv Krahl, Guilherme
Concheyro, Graciela
Bom, Marlone H. H.
Guerra, Rodrigo M.
Kochhann, Karlos G. D.
Bauersachs, Thorsten
Schwark, Lorenz
Ceolin, Daiane
Musso, Telma Belén
Fauth, Gerson
author Krahl, Guilherme
author_facet Krahl, Guilherme
Concheyro, Graciela
Bom, Marlone H. H.
Guerra, Rodrigo M.
Kochhann, Karlos G. D.
Bauersachs, Thorsten
Schwark, Lorenz
Ceolin, Daiane
Musso, Telma Belén
Fauth, Gerson
author_role author
author2 Concheyro, Graciela
Bom, Marlone H. H.
Guerra, Rodrigo M.
Kochhann, Karlos G. D.
Bauersachs, Thorsten
Schwark, Lorenz
Ceolin, Daiane
Musso, Telma Belén
Fauth, Gerson
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Micropaleontology
K/Pg boundary of Argentina
Planktic foraminifera
Neuquina Basin
topic Micropaleontology
K/Pg boundary of Argentina
Planktic foraminifera
Neuquina Basin
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Maastrichtian–Danian time interval corresponds to one of the largest mass extinctions in theEarth’s geological history. We investigate changes in planktic foraminiferal assemblages and TEXH86-based sea surface temperatures (SSTs), which reflect surface water conditions, across the Maastrichtian–Danian transition at the Cerro Azul section in the Neuquén Basin, Argentina. Within the Maastrichtian, we identify species that became extinct at the Cretaceous–Paleogene (K–Pg) boundary, such as Planoheterohelix globulosa and Muricohedbergella monmouthensis, even though these taxa are not typically employed as biostratigraphic markers.Dominance of guembelitrids, usually characterised as opportunistic taxa, is recognised in the upper Maastrichtian interval and within the first 35 cm of the lower Danian, suggesting broad instability in the water column across the K–Pg boundary. Within the lower Danian, two planktic foraminiferal biozones, with high-latitude paleogeographic affinities, were recognised. The AP0 zone was recognised for the lowermost 45 cm above the K–Pgboundary, within the partial range of Turborotalina nikolasi. The first occurrence of Globoconusa daubjergensis, 45 cm above the K–Pg boundary, defines the base of subzone AP1a, which extends towards the top of the studied interval (90 cm above the K–Pg boundary). The planktic foraminiferal fauna recovered from the early Danian interval exhibits a strong affinity to high latitudes, as evidenced by the presence of Antarcticella pauciloculata.However, at 45 cm above the K–Pg boundary (biozone AP1a), a slight increase in the abundanceand/or appearance of tropical and/or subtropical species (Woodringina claytonensis) is observed, suggesting an increase in surface water temperature (SST). This coincides with the trend recorded by TEXH 86, which showsa 1.5 °C rise in SST above 45 cm into the Danian interval at the Cerro Azul section. Our assessment of planktic foraminiferal assemblages suggests that the Cerro Azul section comprises a continuous record of the Maastrichtian and early Danian time interval in the Southern Hemisphere. Additionally, a typical distribution pattern across the K–Pg boundary is observed, with the bloom of opportunist taxa. The middle- to high-latitude paleobiogeographic affinity observed at the beginning of the Danian period for planktonic foraminiferal assemblagesfrom the Cerro Azul section is based on the occurrence of Antarcticella pauciloculata, which has itspaleobiogeographic range in the South Atlantic Ocean extended to mid-latitudes.
Fil: Krahl, Guilherme. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Bom, Marlone H. H.. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Guerra, Rodrigo M.. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Kochhann, Karlos G. D.. Geomar-Helmholtz Centre for Ocean Research Kiel; Alemania
Fil: Bauersachs, Thorsten. No especifíca;
Fil: Schwark, Lorenz. No especifíca;
Fil: Ceolin, Daiane. Universidad de Vale do Rio dos Sinos; Brasil
Fil: Musso, Telma Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas. Universidad Nacional del Comahue. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas; Argentina
Fil: Fauth, Gerson. Universidad de Vale do Rio dos Sinos; Brasil
description The Maastrichtian–Danian time interval corresponds to one of the largest mass extinctions in theEarth’s geological history. We investigate changes in planktic foraminiferal assemblages and TEXH86-based sea surface temperatures (SSTs), which reflect surface water conditions, across the Maastrichtian–Danian transition at the Cerro Azul section in the Neuquén Basin, Argentina. Within the Maastrichtian, we identify species that became extinct at the Cretaceous–Paleogene (K–Pg) boundary, such as Planoheterohelix globulosa and Muricohedbergella monmouthensis, even though these taxa are not typically employed as biostratigraphic markers.Dominance of guembelitrids, usually characterised as opportunistic taxa, is recognised in the upper Maastrichtian interval and within the first 35 cm of the lower Danian, suggesting broad instability in the water column across the K–Pg boundary. Within the lower Danian, two planktic foraminiferal biozones, with high-latitude paleogeographic affinities, were recognised. The AP0 zone was recognised for the lowermost 45 cm above the K–Pgboundary, within the partial range of Turborotalina nikolasi. The first occurrence of Globoconusa daubjergensis, 45 cm above the K–Pg boundary, defines the base of subzone AP1a, which extends towards the top of the studied interval (90 cm above the K–Pg boundary). The planktic foraminiferal fauna recovered from the early Danian interval exhibits a strong affinity to high latitudes, as evidenced by the presence of Antarcticella pauciloculata.However, at 45 cm above the K–Pg boundary (biozone AP1a), a slight increase in the abundanceand/or appearance of tropical and/or subtropical species (Woodringina claytonensis) is observed, suggesting an increase in surface water temperature (SST). This coincides with the trend recorded by TEXH 86, which showsa 1.5 °C rise in SST above 45 cm into the Danian interval at the Cerro Azul section. Our assessment of planktic foraminiferal assemblages suggests that the Cerro Azul section comprises a continuous record of the Maastrichtian and early Danian time interval in the Southern Hemisphere. Additionally, a typical distribution pattern across the K–Pg boundary is observed, with the bloom of opportunist taxa. The middle- to high-latitude paleobiogeographic affinity observed at the beginning of the Danian period for planktonic foraminiferal assemblagesfrom the Cerro Azul section is based on the occurrence of Antarcticella pauciloculata, which has itspaleobiogeographic range in the South Atlantic Ocean extended to mid-latitudes.
publishDate 2026
dc.date.none.fl_str_mv 2026-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/290087
Krahl, Guilherme; Concheyro, Graciela; Bom, Marlone H. H.; Guerra, Rodrigo M.; Kochhann, Karlos G. D.; et al.; Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance; Copernicus Publications; Journal of Micropalaeontology; 45; 1; 4-2026; 297-308
2041-4978
CONICET Digital
CONICET
url http://hdl.handle.net/11336/290087
identifier_str_mv Krahl, Guilherme; Concheyro, Graciela; Bom, Marlone H. H.; Guerra, Rodrigo M.; Kochhann, Karlos G. D.; et al.; Planktic foraminiferal distribution across the Cretaceous–Paleogene (K–Pg) boundary from the Neuquén Basin (Cerro Azul section): biostratigraphy and paleoenvironmental significance; Copernicus Publications; Journal of Micropalaeontology; 45; 1; 4-2026; 297-308
2041-4978
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://jm.copernicus.org/articles/45/297/2026/
info:eu-repo/semantics/altIdentifier/doi/10.5194/jm-45-297-2026
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
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 13.265058

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