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dc.contributor.author
Contreras, Silvina Andrea  
dc.contributor.author
Lutz, Alicia Isabel  
dc.contributor.author
Zucol, Alejandro Fabián  
dc.date.available
2017-10-18T18:05:26Z  
dc.date.issued
2015-09-18  
dc.identifier.citation
Contreras, Silvina Andrea; Lutz, Alicia Isabel; Zucol, Alejandro Fabián; Holocene paleoagrostological impressions from the eastern Chaco region (Argentina); Elsevier Science; Review of Palaeobotany and Palynology; 223; 18-9-2015; 37-49  
dc.identifier.issn
0034-6667  
dc.identifier.uri
http://hdl.handle.net/11336/26781  
dc.description.abstract
Although no data are available on the paleoflora of the Chaco plain, plant fossil impressions are found in the banks of the low Bermejo River, which flows along the Eastern Chaco phytogeographic region. Here, we analyze paleoagrostological impressions recovered from two fossiliferous localities in order to provide insights into the environmental history of the Chaco region. Sixty complete Poaceae spikelet impressions were studied morphologically and compared with extant Chaco grass species. For each fossil spikelet, 11 morphological characters were described and statistically analyzed. All spikelets were found to belong to the Panicoideae subfamily, and some have consistent morphological features with this subfamily; hence, we assign them to the extant genera Cenchrus, Echinochloa, Hymenachne, and Paspalum. These impressions are the first floral remains found in the Eastern Chaco and collectively suggest that environmental and climatic conditions from these sediments corresponded to a subtropical humid climate and that vegetation was similar to the extant Eastern Chaco flora.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Chaco  
dc.subject
Quaternary  
dc.subject
Poaceae  
dc.subject
Spikelet Impress  
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Holocene paleoagrostological impressions from the eastern Chaco region (Argentina)  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-10-04T14:54:32Z  
dc.identifier.eissn
0034-6667  
dc.journal.volume
223  
dc.journal.pagination
37-49  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Contreras, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina  
dc.description.fil
Fil: Lutz, Alicia Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina  
dc.description.fil
Fil: Zucol, Alejandro Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Entre Rios. Universidad Nacional de Entre Rios. Centro de Investigaciones y Transferencia de Entre Rios; Argentina  
dc.journal.title
Review of Palaeobotany and Palynology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.revpalbo.2015.08.008  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S003466671500161X