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dc.contributor.author
Iglesias, Ari
dc.contributor.author
Wilf, Peter
dc.contributor.author
Johnson, Kirk R.
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Zamuner, Alba Berta
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Cúneo, N. Rubén
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Matheos, Sergio Daniel
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Singer, Bradley S.
dc.date.available
2023-10-25T12:24:20Z
dc.date.issued
2007-12
dc.identifier.citation
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
dc.identifier.issn
0091-7613
dc.identifier.uri
http://hdl.handle.net/11336/215824
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of America
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
PALEOCENE
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PATAGONIA
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PLANT DIVERSITY
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SALAMANCA FORMATION
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SOUTH AFRICA
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Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
A Paleocene lowland macroflora from Patagonia reveals significantly greater richness than North American analogs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-10-19T14:35:10Z
dc.journal.volume
35
dc.journal.number
10
dc.journal.pagination
947-950
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Boulder
dc.description.fil
Fil: Iglesias, Ari. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
dc.description.fil
Fil: Wilf, Peter. State University of Pennsylvania; Estados Unidos. University Park; Estados Unidos
dc.description.fil
Fil: Johnson, Kirk R.. Denver Museum of Nature & Science; Estados Unidos
dc.description.fil
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
dc.description.fil
Fil: Cúneo, N. Rubén. Museo Paleontológico Egidio Feruglio; Argentina
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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
dc.description.fil
Fil: Singer, Bradley S.. University of Wisconsin; Estados Unidos
dc.journal.title
Geology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/geology/article/35/10/947/129743/A-Paleocene-lowland-macroflora-from-Patagonia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1130/G23889A.1
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