Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula
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...
Published in: | Ameghiniana |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Asociacion Paleontologica Argentina
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Online Access: | http://hdl.handle.net/11336/60067 |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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English |
topic |
ANTARCTIC PENINSULA FORAMINIFERA JAMES ROSS ISLAND PALYNOMORPHS UPPER CRETACEOUS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ANTARCTIC PENINSULA FORAMINIFERA JAMES ROSS ISLAND PALYNOMORPHS UPPER CRETACEOUS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 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 |
topic_facet |
ANTARCTIC PENINSULA FORAMINIFERA JAMES ROSS ISLAND PALYNOMORPHS UPPER CRETACEOUS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
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. 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 ... |
format |
Article in Journal/Newspaper |
author |
Carames, Andrea Alejandra Rodriguez Amenabar, Cecilia Concheyro, Graciela |
author_facet |
Carames, Andrea Alejandra Rodriguez Amenabar, Cecilia Concheyro, Graciela |
author_sort |
Carames, Andrea Alejandra |
title |
Upper Cretaceous foraminifera and palynomorphs from Ekelöf coast Section, Ekelöf Point, Eastern James Ross Island, Antarctic Peninsula |
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 |
publisher |
Asociacion Paleontologica Argentina |
url |
http://hdl.handle.net/11336/60067 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-62.430,-62.430,-69.986,-69.986) ENVELOPE(-57.206,-57.206,-64.224,-64.224) ENVELOPE(-57.204,-57.204,-64.224,-64.224) ENVELOPE(-57.206,-57.206,-64.224,-64.224) ENVELOPE(-57.300,-57.300,-64.367,-64.367) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic Antarctic Peninsula Ross Island Pablo Hill Island Snow Hill Island isla James Ekelöf Punta Ekelöf Ekelöf Point Hamilton Point Snow Hill |
geographic_facet |
Antarctic Antarctic Peninsula Ross Island Pablo Hill Island Snow Hill Island isla James Ekelöf Punta Ekelöf Ekelöf Point Hamilton Point Snow Hill |
genre |
Antarc* Antarctic Antarctic Peninsula Antártica James Ross Island Ross Island Snow Hill Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antártica James Ross Island Ross Island Snow Hill Island |
op_relation |
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 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 |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.5710/AMGH.27.01.2016.2963 |
container_title |
Ameghiniana |
container_volume |
53 |
container_issue |
3 |
container_start_page |
333 |
op_container_end_page |
357 |
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1779315717273812992 |
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ftconicet:oai:ri.conicet.gov.ar:11336/60067 2023-10-09T21:45:04+02:00 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 Carames, Andrea Alejandra Rodriguez Amenabar, Cecilia Concheyro, Graciela application/pdf http://hdl.handle.net/11336/60067 eng eng Asociacion Paleontologica Argentina 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 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 info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ANTARCTIC PENINSULA FORAMINIFERA JAMES ROSS ISLAND PALYNOMORPHS UPPER CRETACEOUS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.5710/AMGH.27.01.2016.2963 2023-09-24T19:00:07Z 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antártica James Ross Island Ross Island Snow Hill Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Antarctic Peninsula Ross Island Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) isla James ENVELOPE(-62.430,-62.430,-69.986,-69.986) Ekelöf ENVELOPE(-57.206,-57.206,-64.224,-64.224) Punta Ekelöf ENVELOPE(-57.204,-57.204,-64.224,-64.224) Ekelöf Point ENVELOPE(-57.206,-57.206,-64.224,-64.224) Hamilton Point ENVELOPE(-57.300,-57.300,-64.367,-64.367) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Ameghiniana 53 3 333 357 |