Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica
New petrographic and isotopic data from inoceramid bivalve shells and belemnite rostra from the lower Campanian and belemnite rostra from the mid-upper Maastrichtian of the Marambio Group, James Ross Basin, Antarctica are presented. Most of the inoceramid data were processed from shell fragments of...
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ftconicet:oai:ri.conicet.gov.ar:11336/94940 2023-10-09T21:47:15+02:00 Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica Elorza, Javier Gómez Alday, Juan J. Olivero, Eduardo Bernardo application/pdf http://hdl.handle.net/11336/94940 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/BF02668176 info:eu-repo/semantics/altIdentifier/doi/10.1007/BF02668176 http://hdl.handle.net/11336/94940 Elorza, Javier; Gómez Alday, Juan J.; Olivero, Eduardo Bernardo; Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica; Springer; Facies; 44; 1; 1-2001; 227-242 0172-9179 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Inocermids Upper Cretaceous Antarctica Paleoenvironment 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/10.1007/BF02668176 2023-09-24T18:21:29Z New petrographic and isotopic data from inoceramid bivalve shells and belemnite rostra from the lower Campanian and belemnite rostra from the mid-upper Maastrichtian of the Marambio Group, James Ross Basin, Antarctica are presented. Most of the inoceramid data were processed from shell fragments of the large formAntarcticeramus rabotensis (Crame and Luther) at the stratigraphic level marking the extinction of the inoceramids in the James Ross Basin (uppermost early Campanian-basal late Campanian). Standard transmitted light microscopy and cathodoluminescence (CL) studies in thin sections ofA. rabotensis show clear evidence of environmental stress, which is reflected as marked growth breaks in the shell banding of this large inoceramid bivalve. At Redonda Point, CL and the mean oxygen isotopic value (δ18O=-3.11‰ 3 (PDB); n=11; t°=25.4°C) indicate a varied degree of diagenetic modification, but without any evidence of neomorphism along the prismatic microstructures. Early Campanian belemnite rostra are much less diagenetically modified (at the Brandy Bay section; and the Santa Marta section; δ18O=-0.50‰ (PDB); n=5; t°=14.0°C and 3 δ18O=-0.94‰ (PDB); n=21; t°=15.8°C) and are non luminescent 3 except for localized, organic-rich bands. The mean oxygen isotopic value for mid-late Maastrichtian belemnite rostra (at the Seymour Island section; δ18O=-0.11‰ 3 (PDB); n=5; t°=12.5°C) indicates a substantial drop in the sea-water paleotemperature, suggesting a causal relationship between the early extinction of the inoceramid bivalves in high latitudes of the Southern Hemisphere and the falling sea-water temperature. Fil: Elorza, Javier. Universidad del País Vasco; España Fil: Gómez Alday, Juan J. Universidad del País Vasco; España Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Article in Journal/Newspaper Antarc* Antarctica Seymour Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Austral Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Redonda ENVELOPE(-26.000,-26.000,-76.167,-76.167) Olivero ENVELOPE(-63.600,-63.600,-66.133,-66.133) Brandy Bay ENVELOPE(-58.000,-58.000,-63.700,-63.700) Facies 44 1 227 242 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Inocermids Upper Cretaceous Antarctica Paleoenvironment https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Inocermids Upper Cretaceous Antarctica Paleoenvironment https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Elorza, Javier Gómez Alday, Juan J. Olivero, Eduardo Bernardo Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
topic_facet |
Inocermids Upper Cretaceous Antarctica Paleoenvironment https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
New petrographic and isotopic data from inoceramid bivalve shells and belemnite rostra from the lower Campanian and belemnite rostra from the mid-upper Maastrichtian of the Marambio Group, James Ross Basin, Antarctica are presented. Most of the inoceramid data were processed from shell fragments of the large formAntarcticeramus rabotensis (Crame and Luther) at the stratigraphic level marking the extinction of the inoceramids in the James Ross Basin (uppermost early Campanian-basal late Campanian). Standard transmitted light microscopy and cathodoluminescence (CL) studies in thin sections ofA. rabotensis show clear evidence of environmental stress, which is reflected as marked growth breaks in the shell banding of this large inoceramid bivalve. At Redonda Point, CL and the mean oxygen isotopic value (δ18O=-3.11‰ 3 (PDB); n=11; t°=25.4°C) indicate a varied degree of diagenetic modification, but without any evidence of neomorphism along the prismatic microstructures. Early Campanian belemnite rostra are much less diagenetically modified (at the Brandy Bay section; and the Santa Marta section; δ18O=-0.50‰ (PDB); n=5; t°=14.0°C and 3 δ18O=-0.94‰ (PDB); n=21; t°=15.8°C) and are non luminescent 3 except for localized, organic-rich bands. The mean oxygen isotopic value for mid-late Maastrichtian belemnite rostra (at the Seymour Island section; δ18O=-0.11‰ 3 (PDB); n=5; t°=12.5°C) indicates a substantial drop in the sea-water paleotemperature, suggesting a causal relationship between the early extinction of the inoceramid bivalves in high latitudes of the Southern Hemisphere and the falling sea-water temperature. Fil: Elorza, Javier. Universidad del País Vasco; España Fil: Gómez Alday, Juan J. Universidad del País Vasco; España Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Elorza, Javier Gómez Alday, Juan J. Olivero, Eduardo Bernardo |
author_facet |
Elorza, Javier Gómez Alday, Juan J. Olivero, Eduardo Bernardo |
author_sort |
Elorza, Javier |
title |
Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
title_short |
Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
title_full |
Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
title_fullStr |
Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
title_full_unstemmed |
Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica |
title_sort |
environmental stress and diagenetic modifications in inoceramids and belemnites from the upper cretaceous james ross basin, antarctica |
publisher |
Springer |
url |
http://hdl.handle.net/11336/94940 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-26.000,-26.000,-76.167,-76.167) ENVELOPE(-63.600,-63.600,-66.133,-66.133) ENVELOPE(-58.000,-58.000,-63.700,-63.700) |
geographic |
Austral Argentina Seymour Seymour Island Marambio Redonda Olivero Brandy Bay |
geographic_facet |
Austral Argentina Seymour Seymour Island Marambio Redonda Olivero Brandy Bay |
genre |
Antarc* Antarctica Seymour Island |
genre_facet |
Antarc* Antarctica Seymour Island |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/BF02668176 info:eu-repo/semantics/altIdentifier/doi/10.1007/BF02668176 http://hdl.handle.net/11336/94940 Elorza, Javier; Gómez Alday, Juan J.; Olivero, Eduardo Bernardo; Environmental stress and diagenetic modifications in inoceramids and belemnites from the Upper Cretaceous James Ross Basin, Antarctica; Springer; Facies; 44; 1; 1-2001; 227-242 0172-9179 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/BF02668176 |
container_title |
Facies |
container_volume |
44 |
container_issue |
1 |
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227 |
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242 |
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1779310213253300224 |