Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications

We analyse and discuss the occurrence of roots and root traces in a Late Pleistocene-Holocene alluvial sequence at La Horqueta II, Quequén Grande river (Buenos Aires Province). The working hypothesis that the ferruginous root traces present at the alluvial section are transgressive stratigraphic fea...

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Autores principales: Tonello, M.S., Zárate, M.A., Mancini, M.V.
Formato: JOUR
Lenguaje:Spanish
Materias:
Alluvial sequences
Buenos aires
Pleistocene-Holocene
Root traces
Stratigraphy
alluvial deposit
Quaternary
root system
stratigraphy
transgression
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v39_n2_p163_Tonello
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v39_n2_p163_Tonello
record_format dspace
spelling todo:paper_00027014_v39_n2_p163_Tonello2023-10-03T13:52:47Z Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications Tonello, M.S. Zárate, M.A. Mancini, M.V. Alluvial sequences Buenos aires Pleistocene-Holocene Root traces Stratigraphy alluvial deposit Quaternary root system stratigraphy transgression Argentina We analyse and discuss the occurrence of roots and root traces in a Late Pleistocene-Holocene alluvial sequence at La Horqueta II, Quequén Grande river (Buenos Aires Province). The working hypothesis that the ferruginous root traces present at the alluvial section are transgressive stratigraphic features in relation to their host material (older than 9,000 14C yr BP) is considered. Census of both present vegetation and root traces were carried out along with chemical and grain-size analysis, morphological description of the root traces, histological studies and a radiocarbon dating. The roots associated to the traces may belong to the Poaceae family, main component of the present vegetation, and exhibit a variable degree of preservation suggesting different relative ages. A 14C dating of a highly decomposed root yielded an age of 118.5 years ± 0.6 14C yr BP which, together with the occurrence of roots from the present vegetation inside some of the traces, suggest that these root traces are transgressive stratigraphic features. Probably, most of the root traces were formed during the last 2,500 14C yr BP and their formation continues today. JOUR Spanish info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v39_n2_p163_Tonello
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Spanish
orig_language_str_mv Spanish
topic Alluvial sequences
Buenos aires
Pleistocene-Holocene
Root traces
Stratigraphy
alluvial deposit
Quaternary
root system
stratigraphy
transgression
Argentina
spellingShingle Alluvial sequences
Buenos aires
Pleistocene-Holocene
Root traces
Stratigraphy
alluvial deposit
Quaternary
root system
stratigraphy
transgression
Argentina
Tonello, M.S.
Zárate, M.A.
Mancini, M.V.
Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
topic_facet Alluvial sequences
Buenos aires
Pleistocene-Holocene
Root traces
Stratigraphy
alluvial deposit
Quaternary
root system
stratigraphy
transgression
Argentina
description We analyse and discuss the occurrence of roots and root traces in a Late Pleistocene-Holocene alluvial sequence at La Horqueta II, Quequén Grande river (Buenos Aires Province). The working hypothesis that the ferruginous root traces present at the alluvial section are transgressive stratigraphic features in relation to their host material (older than 9,000 14C yr BP) is considered. Census of both present vegetation and root traces were carried out along with chemical and grain-size analysis, morphological description of the root traces, histological studies and a radiocarbon dating. The roots associated to the traces may belong to the Poaceae family, main component of the present vegetation, and exhibit a variable degree of preservation suggesting different relative ages. A 14C dating of a highly decomposed root yielded an age of 118.5 years ± 0.6 14C yr BP which, together with the occurrence of roots from the present vegetation inside some of the traces, suggest that these root traces are transgressive stratigraphic features. Probably, most of the root traces were formed during the last 2,500 14C yr BP and their formation continues today.
format JOUR
author Tonello, M.S.
Zárate, M.A.
Mancini, M.V.
author_facet Tonello, M.S.
Zárate, M.A.
Mancini, M.V.
author_sort Tonello, M.S.
title Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
title_short Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
title_full Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
title_fullStr Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
title_full_unstemmed Ferruginous root traces from an alluvial sequence of the Quequen Grande river (Buenos Aires): Stratigraphic and environmental implications
title_sort ferruginous root traces from an alluvial sequence of the quequen grande river (buenos aires): stratigraphic and environmental implications
url http://hdl.handle.net/20.500.12110/paper_00027014_v39_n2_p163_Tonello
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AT zaratema ferruginousroottracesfromanalluvialsequenceofthequequengranderiverbuenosairesstratigraphicandenvironmentalimplications
AT mancinimv ferruginousroottracesfromanalluvialsequenceofthequequengranderiverbuenosairesstratigraphicandenvironmentalimplications
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