Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula
The occurrence of a large gastrolith set associated with a specimen referred to Aristonectes sp. is reported here for the first time. The specimen MLP 89-III-3-1 comes from Seymour Island (Is. Marambio), Antarctic Peninsula, López de Bertodano Formation (upper Maastrichtian). The gastrolith cluster...
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ftconicet:oai:ri.conicet.gov.ar:11336/7400 2023-10-09T21:46:03+02:00 Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula O'gorman, Jose Patricio Olivero, Eduardo Bernardo Santillana, Sergio Everhart, Michael J. Reguero, Marcelo Alfredo application/pdf http://hdl.handle.net/11336/7400 eng eng Elsevier info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0195667114000512 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cretres.2014.03.011 http://hdl.handle.net/11336/7400 O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Santillana, Sergio; Everhart, Michael J.; Reguero, Marcelo Alfredo; Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula; Elsevier; Cretaceous Research (print); 50; 1-2014; 228-237 0195-6671 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ Gastrolith Aristonectes Upper Cretaceous Antarctica 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/10.1016/j.cretres.2014.03.011 2023-09-24T19:13:18Z The occurrence of a large gastrolith set associated with a specimen referred to Aristonectes sp. is reported here for the first time. The specimen MLP 89-III-3-1 comes from Seymour Island (Is. Marambio), Antarctic Peninsula, López de Bertodano Formation (upper Maastrichtian). The gastrolith cluster is composed of 793 elements (534 in their presumed original state and about 259 that are broken). The gastroliths are described using sedimentological indices. The mean major axis of the gastroliths is 21 mm, the mean Maximum Projection Sphericity is 0.71 and the standard deviation is 0.11. According to Krumbein?s classification, 43.3% are spheroidal (equant), 14.9% are cylindrical (prolate), 34.7% are discoidal and 7.1% are bladed (laminar). Following Powers? roundness categories, 10.1% are very rounded, 29.2% are rounded and 60.7% are subrounded. The mean Maximum Projection Sphericity value indicates a fluvial origin for the gastroliths. Petrographically, the gastroliths comprise rhyolitic volcanites (56.2%), quartz vein material (27.8%), subarkose arenites (14.5%) and laminated, radiolarian-rich mudstones and tuffs (1.5%). The potential geological sources are several formations from the Antarctic Peninsula, such as the Upper Jurassic Antarctic Peninsula Volcanic Group (rhyolitic volcanites), the Permian-Triassic Trinity Peninsula Group (subarkose arenites), and the KimmeridgianeBerriasian Ameghino Formation (radiolarian-rich mudstones and tuffs). All these formations crop out within about 100 km of the locality where the specimen was collected. We also discuss how gastroliths were ingested, concluding that the ingestion was not done individually. Finally, this record of gastroliths provides evidence against the hypothesis of their use for buoyancy control Fil: O'gorman, Jose Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico La Plata; Argentina Fil: Olivero, Eduardo Bernardo. ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula 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) Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Olivero ENVELOPE(-63.600,-63.600,-66.133,-66.133) Cretaceous Research 50 228 237 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Gastrolith Aristonectes Upper Cretaceous Antarctica https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Gastrolith Aristonectes Upper Cretaceous Antarctica https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 O'gorman, Jose Patricio Olivero, Eduardo Bernardo Santillana, Sergio Everhart, Michael J. Reguero, Marcelo Alfredo Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
topic_facet |
Gastrolith Aristonectes Upper Cretaceous Antarctica https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The occurrence of a large gastrolith set associated with a specimen referred to Aristonectes sp. is reported here for the first time. The specimen MLP 89-III-3-1 comes from Seymour Island (Is. Marambio), Antarctic Peninsula, López de Bertodano Formation (upper Maastrichtian). The gastrolith cluster is composed of 793 elements (534 in their presumed original state and about 259 that are broken). The gastroliths are described using sedimentological indices. The mean major axis of the gastroliths is 21 mm, the mean Maximum Projection Sphericity is 0.71 and the standard deviation is 0.11. According to Krumbein?s classification, 43.3% are spheroidal (equant), 14.9% are cylindrical (prolate), 34.7% are discoidal and 7.1% are bladed (laminar). Following Powers? roundness categories, 10.1% are very rounded, 29.2% are rounded and 60.7% are subrounded. The mean Maximum Projection Sphericity value indicates a fluvial origin for the gastroliths. Petrographically, the gastroliths comprise rhyolitic volcanites (56.2%), quartz vein material (27.8%), subarkose arenites (14.5%) and laminated, radiolarian-rich mudstones and tuffs (1.5%). The potential geological sources are several formations from the Antarctic Peninsula, such as the Upper Jurassic Antarctic Peninsula Volcanic Group (rhyolitic volcanites), the Permian-Triassic Trinity Peninsula Group (subarkose arenites), and the KimmeridgianeBerriasian Ameghino Formation (radiolarian-rich mudstones and tuffs). All these formations crop out within about 100 km of the locality where the specimen was collected. We also discuss how gastroliths were ingested, concluding that the ingestion was not done individually. Finally, this record of gastroliths provides evidence against the hypothesis of their use for buoyancy control Fil: O'gorman, Jose Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico La Plata; Argentina Fil: Olivero, Eduardo Bernardo. ... |
format |
Article in Journal/Newspaper |
author |
O'gorman, Jose Patricio Olivero, Eduardo Bernardo Santillana, Sergio Everhart, Michael J. Reguero, Marcelo Alfredo |
author_facet |
O'gorman, Jose Patricio Olivero, Eduardo Bernardo Santillana, Sergio Everhart, Michael J. Reguero, Marcelo Alfredo |
author_sort |
O'gorman, Jose Patricio |
title |
Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
title_short |
Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
title_full |
Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
title_fullStr |
Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
title_full_unstemmed |
Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula |
title_sort |
gastroliths associated with an aristonectes specimen (plesiosauria, elasmosauridae), lópez de bertodano formation (upper maastrichtian) seymour island (is. marambio), antarctic peninsula |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/7400 |
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(-58.000,-58.000,-63.500,-63.500) ENVELOPE(-63.600,-63.600,-66.133,-66.133) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Argentina Seymour Seymour Island Marambio Trinity Peninsula Olivero |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Argentina Seymour Seymour Island Marambio Trinity Peninsula Olivero |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0195667114000512 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cretres.2014.03.011 http://hdl.handle.net/11336/7400 O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Santillana, Sergio; Everhart, Michael J.; Reguero, Marcelo Alfredo; Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula; Elsevier; Cretaceous Research (print); 50; 1-2014; 228-237 0195-6671 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.cretres.2014.03.011 |
container_title |
Cretaceous Research |
container_volume |
50 |
container_start_page |
228 |
op_container_end_page |
237 |
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1779321712230268928 |