Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula

Autores
Carames, Andrea Alejandra; Rodriguez Amenabar, Cecilia; Concheyro, Graciela
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point Member of the Snow Hill Island Formation. Among the foraminifera, 18 benthictaxa including 10 agglutinated and eight calcareous are recognized. Palynomorphs include continental and marine species. The continental assemblage contains 44 spore and pollen species. The marine assemblage consists of 10 peridinioid dinoflagellate cysts species, dominating in number of specimens, and 10 gonyaulacoids. Although the palynomorph assemblage supports a late Campanian age for the section, an earliest Maastrichtian age is not excluded. The paleoenvironmental interpretation based on the distribution of foraminiferal morphogroups indicates an outer shelf-upper bathyal environment in agreement with sedimentological data. The paleoenvironmental inference based on the S/D ratio (sporomorph versus din of lagellate cysts) and the P/G ratio (pendinioid versus gonyaulacoid cysts) suggest a coastal to inner neritic setting with a continuous continental supply from the continent to the marine environment, evidenced by the slight dominance of the peridionoids over gonyaulacoids cysts. The discrepancy observed between palynological and micropaleontological-sedimentological data may be linked to the development of a narrow continental shelf during the Late Cretaceous. In such continental shelf, terrestrial palynomorphs and peridinoid cysts would quickly run down the slope and would be deposited in the deep marine environment together with gonyaulacoid cysts.
Fil: Carames, Andrea Alejandra. 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: Rodriguez Amenabar, Cecilia. 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: 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
Materia
ANTARCTIC PENINSULA
FORAMINIFERA
JAMES ROSS ISLAND
PALYNOMORPHS
UPPER CRETACEOUS
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:11336/60067
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/60067
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic PeninsulaForaminíferos y Palinomorfos del Cretácico superior de la sección Ekelöf costa, Punta Ekelöf, este de la Isla James Ross, península antárticaCarames, Andrea AlejandraRodriguez Amenabar, CeciliaConcheyro, GracielaANTARCTIC PENINSULAFORAMINIFERAJAMES ROSS ISLANDPALYNOMORPHSUPPER CRETACEOUShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point Member of the Snow Hill Island Formation. Among the foraminifera, 18 benthictaxa including 10 agglutinated and eight calcareous are recognized. Palynomorphs include continental and marine species. The continental assemblage contains 44 spore and pollen species. The marine assemblage consists of 10 peridinioid dinoflagellate cysts species, dominating in number of specimens, and 10 gonyaulacoids. Although the palynomorph assemblage supports a late Campanian age for the section, an earliest Maastrichtian age is not excluded. The paleoenvironmental interpretation based on the distribution of foraminiferal morphogroups indicates an outer shelf-upper bathyal environment in agreement with sedimentological data. The paleoenvironmental inference based on the S/D ratio (sporomorph versus din of lagellate cysts) and the P/G ratio (pendinioid versus gonyaulacoid cysts) suggest a coastal to inner neritic setting with a continuous continental supply from the continent to the marine environment, evidenced by the slight dominance of the peridionoids over gonyaulacoids cysts. The discrepancy observed between palynological and micropaleontological-sedimentological data may be linked to the development of a narrow continental shelf during the Late Cretaceous. In such continental shelf, terrestrial palynomorphs and peridinoid cysts would quickly run down the slope and would be deposited in the deep marine environment together with gonyaulacoid cysts.Fil: Carames, Andrea Alejandra. 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: Rodriguez Amenabar, Cecilia. 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: 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"; ArgentinaAsociacion Paleontologica Argentina2016-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60067Carames, Andrea Alejandra; Rodriguez Amenabar, Cecilia; Concheyro, Graciela; Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula; Asociacion Paleontologica Argentina; Ameghiniana; 53; 3; 6-2016; 333-3570002-70141851-8044CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2963info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.5710/AMGH.27.01.2016.2963info:eu-repo/semantics/altIdentifier/doi/10.5710/AMGH.27.01.2016.2963info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:22Zoai:ri.conicet.gov.ar:11336/60067instacron: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 09:51:22.452CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
Foraminíferos y Palinomorfos del Cretácico superior de la sección Ekelöf costa, Punta Ekelöf, este de la Isla James Ross, península antártica
title Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
spellingShingle Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
Carames, Andrea Alejandra
ANTARCTIC PENINSULA
FORAMINIFERA
JAMES ROSS ISLAND
PALYNOMORPHS
UPPER CRETACEOUS
title_short Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
title_full Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
title_fullStr Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
title_full_unstemmed Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
title_sort Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
dc.creator.none.fl_str_mv Carames, Andrea Alejandra
Rodriguez Amenabar, Cecilia
Concheyro, Graciela
author Carames, Andrea Alejandra
author_facet Carames, Andrea Alejandra
Rodriguez Amenabar, Cecilia
Concheyro, Graciela
author_role author
author2 Rodriguez Amenabar, Cecilia
Concheyro, Graciela
author2_role author
author
dc.subject.none.fl_str_mv ANTARCTIC PENINSULA
FORAMINIFERA
JAMES ROSS ISLAND
PALYNOMORPHS
UPPER CRETACEOUS
topic ANTARCTIC PENINSULA
FORAMINIFERA
JAMES ROSS ISLAND
PALYNOMORPHS
UPPER CRETACEOUS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point Member of the Snow Hill Island Formation. Among the foraminifera, 18 benthictaxa including 10 agglutinated and eight calcareous are recognized. Palynomorphs include continental and marine species. The continental assemblage contains 44 spore and pollen species. The marine assemblage consists of 10 peridinioid dinoflagellate cysts species, dominating in number of specimens, and 10 gonyaulacoids. Although the palynomorph assemblage supports a late Campanian age for the section, an earliest Maastrichtian age is not excluded. The paleoenvironmental interpretation based on the distribution of foraminiferal morphogroups indicates an outer shelf-upper bathyal environment in agreement with sedimentological data. The paleoenvironmental inference based on the S/D ratio (sporomorph versus din of lagellate cysts) and the P/G ratio (pendinioid versus gonyaulacoid cysts) suggest a coastal to inner neritic setting with a continuous continental supply from the continent to the marine environment, evidenced by the slight dominance of the peridionoids over gonyaulacoids cysts. The discrepancy observed between palynological and micropaleontological-sedimentological data may be linked to the development of a narrow continental shelf during the Late Cretaceous. In such continental shelf, terrestrial palynomorphs and peridinoid cysts would quickly run down the slope and would be deposited in the deep marine environment together with gonyaulacoid cysts.
Fil: Carames, Andrea Alejandra. 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: Rodriguez Amenabar, Cecilia. 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: 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
description A micropaleontological analysis of foraminifera and palynomorphs obtained from a partial sedimentary section cropping out at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula, is presented. The section, named Ekelöf Coast, includes the lowest levels of the Upper Cretaceous Hamilton Point Member of the Snow Hill Island Formation. Among the foraminifera, 18 benthictaxa including 10 agglutinated and eight calcareous are recognized. Palynomorphs include continental and marine species. The continental assemblage contains 44 spore and pollen species. The marine assemblage consists of 10 peridinioid dinoflagellate cysts species, dominating in number of specimens, and 10 gonyaulacoids. Although the palynomorph assemblage supports a late Campanian age for the section, an earliest Maastrichtian age is not excluded. The paleoenvironmental interpretation based on the distribution of foraminiferal morphogroups indicates an outer shelf-upper bathyal environment in agreement with sedimentological data. The paleoenvironmental inference based on the S/D ratio (sporomorph versus din of lagellate cysts) and the P/G ratio (pendinioid versus gonyaulacoid cysts) suggest a coastal to inner neritic setting with a continuous continental supply from the continent to the marine environment, evidenced by the slight dominance of the peridionoids over gonyaulacoids cysts. The discrepancy observed between palynological and micropaleontological-sedimentological data may be linked to the development of a narrow continental shelf during the Late Cretaceous. In such continental shelf, terrestrial palynomorphs and peridinoid cysts would quickly run down the slope and would be deposited in the deep marine environment together with gonyaulacoid cysts.
publishDate 2016
dc.date.none.fl_str_mv 2016-06
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/11336/60067
Carames, Andrea Alejandra; Rodriguez Amenabar, Cecilia; Concheyro, Graciela; Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula; Asociacion Paleontologica Argentina; Ameghiniana; 53; 3; 6-2016; 333-357
0002-7014
1851-8044
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60067
identifier_str_mv Carames, Andrea Alejandra; Rodriguez Amenabar, Cecilia; Concheyro, Graciela; Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula; Asociacion Paleontologica Argentina; Ameghiniana; 53; 3; 6-2016; 333-357
0002-7014
1851-8044
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2963
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.5710/AMGH.27.01.2016.2963
info:eu-repo/semantics/altIdentifier/doi/10.5710/AMGH.27.01.2016.2963
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
dc.publisher.none.fl_str_mv Asociacion Paleontologica Argentina
publisher.none.fl_str_mv Asociacion Paleontologica Argentina
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 13.069144

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