A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs

Autores
Iglesias, Ari; Wilf, Peter; Johnson, Kirk R.; Zamuner, Alba Berta; Cúneo, N. Rubén; Matheos, Sergio Daniel; Singer, Bradley S.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Few South American macrofloras of Paleocene age are known, and this limits our knowledge of diversity and composition between the end-Cretaceous event and the Eocene appearance of high floral diversity. We report new, unbiased collections of 2516 compression specimens from the Paleocene Salamanca Formation (ca. 61.7 Ma) from two localities in the Palacio de los Loros exposures in southern Chubut, Patagonia, Argentina. Our samples reveal considerably greater richness than was previously known from the Paleocene of Patagonia, including 36 species of angiosperm leaves as well as angiosperm fruits, flowers, and seeds; ferns; and conifer leaves, cones, and seeds. The floras, which are from siltstone and sandstone channel-fills deposited on low-relief floodplain landscapes in a humid, warm temperate climate, are climatically and paleoenviromnentally comparable to many quantitatively collected Paleocene floras from the Western Interior of North America. Adjusted for sample size, there are >50% more species at each Palacio de los Loros quarry than in any comparable U.S. Paleocene sample. These results indicate more vibrant terrestrial ecosystems in Patagonian than in North American floodplain environments ∼4 m.y. after the end-Cretaceous extinction, and they push back the time line 10 m.y. for the evolution of high floral diversity in South America. The cause of the disparity is unknown but could involve reduced impact effects because of greater distance from the Chicxulub site, higher latest Cretaceous diversity, or faster recovery or immigration rates.
Fil: Iglesias, Ari. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Wilf, Peter. State University of Pennsylvania; Estados Unidos. University Park; Estados Unidos
Fil: Johnson, Kirk R.. Denver Museum of Nature & Science; Estados Unidos
Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Cúneo, N. Rubén. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Matheos, Sergio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Singer, Bradley S.. University of Wisconsin; Estados Unidos
Materia
PALEOCENE
PATAGONIA
PLANT DIVERSITY
SALAMANCA FORMATION
SOUTH AFRICA
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:11336/215824
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogsIglesias, AriWilf, PeterJohnson, Kirk R.Zamuner, Alba BertaCúneo, N. RubénMatheos, Sergio DanielSinger, Bradley S.PALEOCENEPATAGONIAPLANT DIVERSITYSALAMANCA FORMATIONSOUTH AFRICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Few South American macrofloras of Paleocene age are known, and this limits our knowledge of diversity and composition between the end-Cretaceous event and the Eocene appearance of high floral diversity. We report new, unbiased collections of 2516 compression specimens from the Paleocene Salamanca Formation (ca. 61.7 Ma) from two localities in the Palacio de los Loros exposures in southern Chubut, Patagonia, Argentina. Our samples reveal considerably greater richness than was previously known from the Paleocene of Patagonia, including 36 species of angiosperm leaves as well as angiosperm fruits, flowers, and seeds; ferns; and conifer leaves, cones, and seeds. The floras, which are from siltstone and sandstone channel-fills deposited on low-relief floodplain landscapes in a humid, warm temperate climate, are climatically and paleoenviromnentally comparable to many quantitatively collected Paleocene floras from the Western Interior of North America. Adjusted for sample size, there are >50% more species at each Palacio de los Loros quarry than in any comparable U.S. Paleocene sample. These results indicate more vibrant terrestrial ecosystems in Patagonian than in North American floodplain environments ∼4 m.y. after the end-Cretaceous extinction, and they push back the time line 10 m.y. for the evolution of high floral diversity in South America. The cause of the disparity is unknown but could involve reduced impact effects because of greater distance from the Chicxulub site, higher latest Cretaceous diversity, or faster recovery or immigration rates.Fil: Iglesias, Ari. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Wilf, Peter. State University of Pennsylvania; Estados Unidos. University Park; Estados UnidosFil: Johnson, Kirk R.. Denver Museum of Nature & Science; Estados UnidosFil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Cúneo, N. Rubén. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Matheos, Sergio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaFil: Singer, Bradley S.. University of Wisconsin; Estados UnidosGeological Society of America2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/215824Iglesias, Ari; Wilf, Peter; Johnson, Kirk R.; Zamuner, Alba Berta; Cúneo, N. Rubén; et al.; A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs; Geological Society of America; Geology; 35; 10; 12-2007; 947-9500091-7613CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/geology/article/35/10/947/129743/A-Paleocene-lowland-macroflora-from-Patagoniainfo:eu-repo/semantics/altIdentifier/doi/10.1130/G23889A.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:47:29Zoai:ri.conicet.gov.ar:11336/215824instacron: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:34982025-10-15 14:47:30.16CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
title A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
spellingShingle A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
Iglesias, Ari
PALEOCENE
PATAGONIA
PLANT DIVERSITY
SALAMANCA FORMATION
SOUTH AFRICA
title_short A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
title_full A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
title_fullStr A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
title_full_unstemmed A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
title_sort A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
dc.creator.none.fl_str_mv Iglesias, Ari
Wilf, Peter
Johnson, Kirk R.
Zamuner, Alba Berta
Cúneo, N. Rubén
Matheos, Sergio Daniel
Singer, Bradley S.
author Iglesias, Ari
author_facet Iglesias, Ari
Wilf, Peter
Johnson, Kirk R.
Zamuner, Alba Berta
Cúneo, N. Rubén
Matheos, Sergio Daniel
Singer, Bradley S.
author_role author
author2 Wilf, Peter
Johnson, Kirk R.
Zamuner, Alba Berta
Cúneo, N. Rubén
Matheos, Sergio Daniel
Singer, Bradley S.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv PALEOCENE
PATAGONIA
PLANT DIVERSITY
SALAMANCA FORMATION
SOUTH AFRICA
topic PALEOCENE
PATAGONIA
PLANT DIVERSITY
SALAMANCA FORMATION
SOUTH AFRICA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Few South American macrofloras of Paleocene age are known, and this limits our knowledge of diversity and composition between the end-Cretaceous event and the Eocene appearance of high floral diversity. We report new, unbiased collections of 2516 compression specimens from the Paleocene Salamanca Formation (ca. 61.7 Ma) from two localities in the Palacio de los Loros exposures in southern Chubut, Patagonia, Argentina. Our samples reveal considerably greater richness than was previously known from the Paleocene of Patagonia, including 36 species of angiosperm leaves as well as angiosperm fruits, flowers, and seeds; ferns; and conifer leaves, cones, and seeds. The floras, which are from siltstone and sandstone channel-fills deposited on low-relief floodplain landscapes in a humid, warm temperate climate, are climatically and paleoenviromnentally comparable to many quantitatively collected Paleocene floras from the Western Interior of North America. Adjusted for sample size, there are >50% more species at each Palacio de los Loros quarry than in any comparable U.S. Paleocene sample. These results indicate more vibrant terrestrial ecosystems in Patagonian than in North American floodplain environments ∼4 m.y. after the end-Cretaceous extinction, and they push back the time line 10 m.y. for the evolution of high floral diversity in South America. The cause of the disparity is unknown but could involve reduced impact effects because of greater distance from the Chicxulub site, higher latest Cretaceous diversity, or faster recovery or immigration rates.
Fil: Iglesias, Ari. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Wilf, Peter. State University of Pennsylvania; Estados Unidos. University Park; Estados Unidos
Fil: Johnson, Kirk R.. Denver Museum of Nature & Science; Estados Unidos
Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Cúneo, N. Rubén. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Matheos, Sergio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
Fil: Singer, Bradley S.. University of Wisconsin; Estados Unidos
description Few South American macrofloras of Paleocene age are known, and this limits our knowledge of diversity and composition between the end-Cretaceous event and the Eocene appearance of high floral diversity. We report new, unbiased collections of 2516 compression specimens from the Paleocene Salamanca Formation (ca. 61.7 Ma) from two localities in the Palacio de los Loros exposures in southern Chubut, Patagonia, Argentina. Our samples reveal considerably greater richness than was previously known from the Paleocene of Patagonia, including 36 species of angiosperm leaves as well as angiosperm fruits, flowers, and seeds; ferns; and conifer leaves, cones, and seeds. The floras, which are from siltstone and sandstone channel-fills deposited on low-relief floodplain landscapes in a humid, warm temperate climate, are climatically and paleoenviromnentally comparable to many quantitatively collected Paleocene floras from the Western Interior of North America. Adjusted for sample size, there are >50% more species at each Palacio de los Loros quarry than in any comparable U.S. Paleocene sample. These results indicate more vibrant terrestrial ecosystems in Patagonian than in North American floodplain environments ∼4 m.y. after the end-Cretaceous extinction, and they push back the time line 10 m.y. for the evolution of high floral diversity in South America. The cause of the disparity is unknown but could involve reduced impact effects because of greater distance from the Chicxulub site, higher latest Cretaceous diversity, or faster recovery or immigration rates.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/215824
Iglesias, Ari; Wilf, Peter; Johnson, Kirk R.; Zamuner, Alba Berta; Cúneo, N. Rubén; et al.; A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs; Geological Society of America; Geology; 35; 10; 12-2007; 947-950
0091-7613
CONICET Digital
CONICET
url http://hdl.handle.net/11336/215824
identifier_str_mv Iglesias, Ari; Wilf, Peter; Johnson, Kirk R.; Zamuner, Alba Berta; Cúneo, N. Rubén; et al.; A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs; Geological Society of America; Geology; 35; 10; 12-2007; 947-950
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/url/https://pubs.geoscienceworld.org/gsa/geology/article/35/10/947/129743/A-Paleocene-lowland-macroflora-from-Patagonia
info:eu-repo/semantics/altIdentifier/doi/10.1130/G23889A.1
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.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
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score 13.221938

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