Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia

Autores
Selking, Peter A.; Stromberg, Caroline; Dunn, Regan; Khon, Matthew J.; Carlini, Alfredo Armando; Davies-Vollum, K. Siân; Madden, Richard H.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Eocene-Oligocene transition (EOT) is typically interpreted as a time of drastic global cooling and drying associated with massive growth of a glacial icecap in Antarctica and the shift to an "icehouse" climate. The effects of this transition on the terrestrial environments, floras, and faunas of the Southern Hemisphere, however, have been unclear. Here we document simultaneous changes in fire regime and plant community in Patagonia, Argentina. Decreases in the concentration of magnetite in loessites from the Eocene-Oligocene Vera Member of the Sarmiento Formation correlate with decreases in the fraction of burnt palm phytoliths as well as more consistently palm-dominated phytolith assemblages. Association of magnetite and burnt palm phytoliths suggests intense wildfires, which appear to have been suppressed for ~200 k.y. shortly after the EOT. The disappearance of fire-related characteristics near the EOT is possible if changes in regional wind patterns-consistent with observed changes in sediment particle sizes-caused changes in seasonal precipitation. These results imply a more important role for fire in structuring Eocene-Oligocene landscapes than previously thought.
Fil: Selking, Peter A.. University of Washington; Estados Unidos
Fil: Stromberg, Caroline. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados Unidos
Fil: Dunn, Regan. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados Unidos
Fil: Khon, Matthew J.. Boise State University; Estados Unidos
Fil: Carlini, Alfredo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Davies-Vollum, K. Siân. Sheffield Hallam University; Estados Unidos
Fil: Madden, Richard H.. University of Chicago; Estados Unidos
Materia
Paleo Climate
Dust
Eot
Patagonia
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:11336/78364
Acceder
id CONICETDig_8ecfdfbd9354dd29d0940db6e6b6b696
oai_identifier_str oai:ri.conicet.gov.ar:11336/78364
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Climate, dust, and fire across the Eocene-Oligocene transition, PatagoniaSelking, Peter A.Stromberg, CarolineDunn, ReganKhon, Matthew J.Carlini, Alfredo ArmandoDavies-Vollum, K. SiânMadden, Richard H.Paleo ClimateDustEotPatagoniahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Eocene-Oligocene transition (EOT) is typically interpreted as a time of drastic global cooling and drying associated with massive growth of a glacial icecap in Antarctica and the shift to an "icehouse" climate. The effects of this transition on the terrestrial environments, floras, and faunas of the Southern Hemisphere, however, have been unclear. Here we document simultaneous changes in fire regime and plant community in Patagonia, Argentina. Decreases in the concentration of magnetite in loessites from the Eocene-Oligocene Vera Member of the Sarmiento Formation correlate with decreases in the fraction of burnt palm phytoliths as well as more consistently palm-dominated phytolith assemblages. Association of magnetite and burnt palm phytoliths suggests intense wildfires, which appear to have been suppressed for ~200 k.y. shortly after the EOT. The disappearance of fire-related characteristics near the EOT is possible if changes in regional wind patterns-consistent with observed changes in sediment particle sizes-caused changes in seasonal precipitation. These results imply a more important role for fire in structuring Eocene-Oligocene landscapes than previously thought.Fil: Selking, Peter A.. University of Washington; Estados UnidosFil: Stromberg, Caroline. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados UnidosFil: Dunn, Regan. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados UnidosFil: Khon, Matthew J.. Boise State University; Estados UnidosFil: Carlini, Alfredo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaFil: Davies-Vollum, K. Siân. Sheffield Hallam University; Estados UnidosFil: Madden, Richard H.. University of Chicago; Estados UnidosGeological Society of America2015-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/78364Selking, Peter A.; Stromberg, Caroline; Dunn, Regan; Khon, Matthew J.; Carlini, Alfredo Armando; et al.; Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia; Geological Society of America; Geology; 43; 7; 5-2015; 567-5700091-7613CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1130/G36664.1info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/geology/article/43/7/567/131882/Climate-dust-and-fire-across-the-EoceneOligoceneinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:02:01Zoai:ri.conicet.gov.ar:11336/78364instacron: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:34982025-10-22 11:02:02.145CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
title Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
spellingShingle Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
Selking, Peter A.
Paleo Climate
Dust
Eot
Patagonia
title_short Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
title_full Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
title_fullStr Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
title_full_unstemmed Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
title_sort Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
dc.creator.none.fl_str_mv Selking, Peter A.
Stromberg, Caroline
Dunn, Regan
Khon, Matthew J.
Carlini, Alfredo Armando
Davies-Vollum, K. Siân
Madden, Richard H.
author Selking, Peter A.
author_facet Selking, Peter A.
Stromberg, Caroline
Dunn, Regan
Khon, Matthew J.
Carlini, Alfredo Armando
Davies-Vollum, K. Siân
Madden, Richard H.
author_role author
author2 Stromberg, Caroline
Dunn, Regan
Khon, Matthew J.
Carlini, Alfredo Armando
Davies-Vollum, K. Siân
Madden, Richard H.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Paleo Climate
Dust
Eot
Patagonia
topic Paleo Climate
Dust
Eot
Patagonia
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Eocene-Oligocene transition (EOT) is typically interpreted as a time of drastic global cooling and drying associated with massive growth of a glacial icecap in Antarctica and the shift to an "icehouse" climate. The effects of this transition on the terrestrial environments, floras, and faunas of the Southern Hemisphere, however, have been unclear. Here we document simultaneous changes in fire regime and plant community in Patagonia, Argentina. Decreases in the concentration of magnetite in loessites from the Eocene-Oligocene Vera Member of the Sarmiento Formation correlate with decreases in the fraction of burnt palm phytoliths as well as more consistently palm-dominated phytolith assemblages. Association of magnetite and burnt palm phytoliths suggests intense wildfires, which appear to have been suppressed for ~200 k.y. shortly after the EOT. The disappearance of fire-related characteristics near the EOT is possible if changes in regional wind patterns-consistent with observed changes in sediment particle sizes-caused changes in seasonal precipitation. These results imply a more important role for fire in structuring Eocene-Oligocene landscapes than previously thought.
Fil: Selking, Peter A.. University of Washington; Estados Unidos
Fil: Stromberg, Caroline. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados Unidos
Fil: Dunn, Regan. University of Washington; Estados Unidos. Burke Museum of Natural History and Culture; Estados Unidos
Fil: Khon, Matthew J.. Boise State University; Estados Unidos
Fil: Carlini, Alfredo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Davies-Vollum, K. Siân. Sheffield Hallam University; Estados Unidos
Fil: Madden, Richard H.. University of Chicago; Estados Unidos
description The Eocene-Oligocene transition (EOT) is typically interpreted as a time of drastic global cooling and drying associated with massive growth of a glacial icecap in Antarctica and the shift to an "icehouse" climate. The effects of this transition on the terrestrial environments, floras, and faunas of the Southern Hemisphere, however, have been unclear. Here we document simultaneous changes in fire regime and plant community in Patagonia, Argentina. Decreases in the concentration of magnetite in loessites from the Eocene-Oligocene Vera Member of the Sarmiento Formation correlate with decreases in the fraction of burnt palm phytoliths as well as more consistently palm-dominated phytolith assemblages. Association of magnetite and burnt palm phytoliths suggests intense wildfires, which appear to have been suppressed for ~200 k.y. shortly after the EOT. The disappearance of fire-related characteristics near the EOT is possible if changes in regional wind patterns-consistent with observed changes in sediment particle sizes-caused changes in seasonal precipitation. These results imply a more important role for fire in structuring Eocene-Oligocene landscapes than previously thought.
publishDate 2015
dc.date.none.fl_str_mv 2015-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/78364
Selking, Peter A.; Stromberg, Caroline; Dunn, Regan; Khon, Matthew J.; Carlini, Alfredo Armando; et al.; Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia; Geological Society of America; Geology; 43; 7; 5-2015; 567-570
0091-7613
CONICET Digital
CONICET
url http://hdl.handle.net/11336/78364
identifier_str_mv Selking, Peter A.; Stromberg, Caroline; Dunn, Regan; Khon, Matthew J.; Carlini, Alfredo Armando; et al.; Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia; Geological Society of America; Geology; 43; 7; 5-2015; 567-570
0091-7613
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1130/G36664.1
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/geology/article/43/7/567/131882/Climate-dust-and-fire-across-the-EoceneOligocene
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
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
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
_version_ 1846781218737094656
score 12.982451

Publicaciones similares