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dc.contributor.authorPalópolo, Evangelina Elizabeth-
dc.contributor.authorCasadio, Silvio Alberto-
dc.contributor.authorKroh, Andreas-
dc.contributor.authorHarzhauser, Mathias-
dc.contributor.authorGriffin, Miguel-
dc.date.accessioned2022-05-11T15:18:17Z-
dc.date.available2022-05-11T15:18:17Z-
dc.date.issued2019-
dc.identifier.otherhttps://drive.google.com/file/d/1GD1JuTAhP1uoQTdE-kklaj5J5Yieo-4Z/viewes_ES
dc.identifier.urihttp://rid.unrn.edu.ar/handle/20.500.12049/8741-
dc.language.isoenes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/-
dc.titleLife and death in a submarine volcanic ash dune: the case of a group of patagonian miocene echinoidses_ES
dc.typeObjeto de conferenciaes_ES
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)-
dc.description.filiationFil: Palópolo, Evangelina. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro. Argentina.es_ES
dc.description.filiationFil: Casadio, Silvio. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro. Argentina.es_ES
dc.description.filiationFil: Kroh, Andreas. Naturhistorisches Museum Wien (NHMW). Austria.es_ES
dc.description.filiationFil: Harzhauser, Mathias. Naturhistorisches Museum Wien (NHMW). Austria.es_ES
dc.description.filiationFil: Griffin, Miguel. División Paleontología de Invertebrados, Unidades de Investigación Anexo Museo. Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata. Argentina.es_ES
dc.subject.keywordLife and Deathes_ES
dc.subject.keywordSubmarine Volcanices_ES
dc.subject.keywordPatagonian Miocene Echinoidses_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Exactas y Naturaleses_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geologíaes_ES
dc.description.resumenEarly 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°S?67.648°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 open-marine 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.es_ES
dc.relation.journalTitleReunión de Comunicaciones de la Asociación Paleontológica Argentina 2019es_ES
dc.type.subtypeResumenes_ES
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