Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids

Autores
Palópolo, Evangelina Elizabeth; Casadio, Silvio Alberto; Kroh, A.; Harzhauser, M; Griffin, Miguel
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossiliferous. Echinoids of the heart urchin family Schizasteridae were collected from outcrops exposed along National Route 3, North of Puerto San Julián, Province of Santa Cruz (48.956°S67.648°W). The dominant component of the sedimentary rock is pyroclastic material consisting mainly of shards and volcanically derived clays. The succession containing the bed with echinoids can be interpreted to be the result of sedimentation in a subtidal environment. Sedimentary structures and the trace-fossil suite indicate actively migrating large-scale bedforms in an openmarine setting, in which tidal currents were the dominant sedimentary processes. Extensive colonization by echinoids is interpreted as associated with lower dune migration rate. The bioturbation in the bottomset deposits suggests that the colonization window was relatively long. The fossils studied herein are almost complete and moderately to well-preserved, many of them were found in life position and retain part of their spine cover, suggesting the echinoids were buried in life or within a few days after death. The presence of manganese and iron oxides suggests a high content of organic matter within a suboxic to anoxic environment and is coincident with the strong reaction of the sediment when exposed to peroxide hydrogen. The statistical analysis of echinoids positions in the sedimentary bed showed a clustered distribution, with two dense clusters of echinoids and isolated echinoids between them, suggesting that there could have been variations in sediment organic matter content or competition for space.
Fil: Palópolo, Evangelina Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Casadio, Silvio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Kroh, A.. Naturhistorisches Museum Wien; Austria
Fil: Harzhauser, M. Naturhistorisches Museum Wien; Austria
Fil: Griffin, Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
La Plata
Argentina
Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
Asociación Paleontológica Argentina
Fundación Museo de La Plata “Francisco Pascasio Moreno”
Materia
ECHINOIS
MIOCENO
PATAGONIA
ARGENTINA
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:11336/162958
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoidsPalópolo, Evangelina ElizabethCasadio, Silvio AlbertoKroh, A.Harzhauser, MGriffin, MiguelECHINOISMIOCENOPATAGONIAARGENTINAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossiliferous. Echinoids of the heart urchin family Schizasteridae were collected from outcrops exposed along National Route 3, North of Puerto San Julián, Province of Santa Cruz (48.956°S67.648°W). The dominant component of the sedimentary rock is pyroclastic material consisting mainly of shards and volcanically derived clays. The succession containing the bed with echinoids can be interpreted to be the result of sedimentation in a subtidal environment. Sedimentary structures and the trace-fossil suite indicate actively migrating large-scale bedforms in an openmarine setting, in which tidal currents were the dominant sedimentary processes. Extensive colonization by echinoids is interpreted as associated with lower dune migration rate. The bioturbation in the bottomset deposits suggests that the colonization window was relatively long. The fossils studied herein are almost complete and moderately to well-preserved, many of them were found in life position and retain part of their spine cover, suggesting the echinoids were buried in life or within a few days after death. The presence of manganese and iron oxides suggests a high content of organic matter within a suboxic to anoxic environment and is coincident with the strong reaction of the sediment when exposed to peroxide hydrogen. The statistical analysis of echinoids positions in the sedimentary bed showed a clustered distribution, with two dense clusters of echinoids and isolated echinoids between them, suggesting that there could have been variations in sediment organic matter content or competition for space.Fil: Palópolo, Evangelina Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Casadio, Silvio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Kroh, A.. Naturhistorisches Museum Wien; AustriaFil: Harzhauser, M. Naturhistorisches Museum Wien; AustriaFil: Griffin, Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; ArgentinaReunión de Comunicaciones de la Asociación Paleontológica ArgentinaLa PlataArgentinaUniversidad Nacional de La Plata. Facultad de Ciencias Naturales y MuseoAsociación Paleontológica ArgentinaFundación Museo de La Plata “Francisco Pascasio Moreno”Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/162958Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; La Plata; Argentina; 2019; 137-137CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://libros.unlp.edu.ar/index.php/unlp/catalog/book/1513Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:58:00Zoai:ri.conicet.gov.ar:11336/162958instacron: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 09:58:00.569CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
title Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
spellingShingle Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
Palópolo, Evangelina Elizabeth
ECHINOIS
MIOCENO
PATAGONIA
ARGENTINA
title_short Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
title_full Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
title_fullStr Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
title_full_unstemmed Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
title_sort Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids
dc.creator.none.fl_str_mv Palópolo, Evangelina Elizabeth
Casadio, Silvio Alberto
Kroh, A.
Harzhauser, M
Griffin, Miguel
author Palópolo, Evangelina Elizabeth
author_facet Palópolo, Evangelina Elizabeth
Casadio, Silvio Alberto
Kroh, A.
Harzhauser, M
Griffin, Miguel
author_role author
author2 Casadio, Silvio Alberto
Kroh, A.
Harzhauser, M
Griffin, Miguel
author2_role author
author
author
author
dc.subject.none.fl_str_mv ECHINOIS
MIOCENO
PATAGONIA
ARGENTINA
topic ECHINOIS
MIOCENO
PATAGONIA
ARGENTINA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossiliferous. Echinoids of the heart urchin family Schizasteridae were collected from outcrops exposed along National Route 3, North of Puerto San Julián, Province of Santa Cruz (48.956°S67.648°W). The dominant component of the sedimentary rock is pyroclastic material consisting mainly of shards and volcanically derived clays. The succession containing the bed with echinoids can be interpreted to be the result of sedimentation in a subtidal environment. Sedimentary structures and the trace-fossil suite indicate actively migrating large-scale bedforms in an openmarine setting, in which tidal currents were the dominant sedimentary processes. Extensive colonization by echinoids is interpreted as associated with lower dune migration rate. The bioturbation in the bottomset deposits suggests that the colonization window was relatively long. The fossils studied herein are almost complete and moderately to well-preserved, many of them were found in life position and retain part of their spine cover, suggesting the echinoids were buried in life or within a few days after death. The presence of manganese and iron oxides suggests a high content of organic matter within a suboxic to anoxic environment and is coincident with the strong reaction of the sediment when exposed to peroxide hydrogen. The statistical analysis of echinoids positions in the sedimentary bed showed a clustered distribution, with two dense clusters of echinoids and isolated echinoids between them, suggesting that there could have been variations in sediment organic matter content or competition for space.
Fil: Palópolo, Evangelina Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Casadio, Silvio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Kroh, A.. Naturhistorisches Museum Wien; Austria
Fil: Harzhauser, M. Naturhistorisches Museum Wien; Austria
Fil: Griffin, Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
La Plata
Argentina
Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
Asociación Paleontológica Argentina
Fundación Museo de La Plata “Francisco Pascasio Moreno”
description Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossiliferous. Echinoids of the heart urchin family Schizasteridae were collected from outcrops exposed along National Route 3, North of Puerto San Julián, Province of Santa Cruz (48.956°S67.648°W). The dominant component of the sedimentary rock is pyroclastic material consisting mainly of shards and volcanically derived clays. The succession containing the bed with echinoids can be interpreted to be the result of sedimentation in a subtidal environment. Sedimentary structures and the trace-fossil suite indicate actively migrating large-scale bedforms in an openmarine setting, in which tidal currents were the dominant sedimentary processes. Extensive colonization by echinoids is interpreted as associated with lower dune migration rate. The bioturbation in the bottomset deposits suggests that the colonization window was relatively long. The fossils studied herein are almost complete and moderately to well-preserved, many of them were found in life position and retain part of their spine cover, suggesting the echinoids were buried in life or within a few days after death. The presence of manganese and iron oxides suggests a high content of organic matter within a suboxic to anoxic environment and is coincident with the strong reaction of the sediment when exposed to peroxide hydrogen. The statistical analysis of echinoids positions in the sedimentary bed showed a clustered distribution, with two dense clusters of echinoids and isolated echinoids between them, suggesting that there could have been variations in sediment organic matter content or competition for space.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/162958
Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; La Plata; Argentina; 2019; 137-137
CONICET Digital
CONICET
url http://hdl.handle.net/11336/162958
identifier_str_mv Life and death in a submarine volcanic ash dune: the case of a group of Patagonian Miocene echinoids; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; La Plata; Argentina; 2019; 137-137
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://libros.unlp.edu.ar/index.php/unlp/catalog/book/1513
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.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
publisher.none.fl_str_mv Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
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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