Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic
The Magdalena river transports one of the largest load of sediments per basin area in the world. Its delta position has changed several times over the Neogene. The Arroyo Piedras Section (169 m) in northern Colombia, contains part of the record of the Late Miocene to Early Pliocene evolution of the...
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ftuniveafit:oai:repository.eafit.edu.co:10784/1595 2023-05-15T18:00:55+02:00 Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic Molinares, C.E. Martinez, J.I. Fiorini c, F. Escobard, J. Jaramillo, C. Universidad EAFIT. Departamento de Geología Ciencias del Mar 2012-04-02 application/pdf http://hdl.handle.net/10784/1595 eng eng Elsevier Journal of South American Earth Sciences, Volume 39, November 2012, Pages 170-183 10.1016/j.jsames.2012.04.007. 0895-9811 http://hdl.handle.net/10784/1595 info:eu-repo/semantics/restrictedAccess Acceso restringido TRANSPORTE DE SEDIMENTOS LITOFACIES ESTRATIGRAFÍA - PLIOCENO PETROLOGÍA BENTOS FORAMINÍFEROS Magdalena paleodelta Paleoclimate Tubara Benthonic foraminifera Early Pliocene Sediment transport Lithofacies Geology stratigraphic - pliocene Petrology Benthos Foraminifera info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion publishedVersion Artículo 2012 ftuniveafit 2022-08-28T00:00:38Z The Magdalena river transports one of the largest load of sediments per basin area in the world. Its delta position has changed several times over the Neogene. The Arroyo Piedras Section (169 m) in northern Colombia, contains part of the record of the Late Miocene to Early Pliocene evolution of the Magdalena paleodelta. The section was described and sampled for sedimentological and micropaleontological analyses. Based on lithofacies and benthic foraminifera content, the section was divided in three segments, and the upper segment was dated as Early Pliocene using planktonic foraminifera. The lower segment suggests siliciclastic sedimentation in a proximal prodelta/delta plain transitional environment. The intermediate segment suggests sedimentation in a lagoon and/or coastal swamp environment, whereas the upper segment is interpreted as the result of a transgression and subsequent deposition at the foreshore/upper shoreface environment, with a considerable decrease of terrigenous input. The decrease of sediment delivery to the delta produced by permanent El Niño-like conditions coupled with autocyclic processes could explain the transgressive pattern observed in the Arroyo de Piedras section during the Early Pliocene Article in Journal/Newspaper Planktonic foraminifera Universidad EAFIT, Medellin: Repositorio Institucional Piedras ENVELOPE(-62.933,-62.933,-64.900,-64.900) Journal of South American Earth Sciences 39 170 183 |
institution |
Open Polar |
collection |
Universidad EAFIT, Medellin: Repositorio Institucional |
op_collection_id |
ftuniveafit |
language |
English |
topic |
TRANSPORTE DE SEDIMENTOS LITOFACIES ESTRATIGRAFÍA - PLIOCENO PETROLOGÍA BENTOS FORAMINÍFEROS Magdalena paleodelta Paleoclimate Tubara Benthonic foraminifera Early Pliocene Sediment transport Lithofacies Geology stratigraphic - pliocene Petrology Benthos Foraminifera |
spellingShingle |
TRANSPORTE DE SEDIMENTOS LITOFACIES ESTRATIGRAFÍA - PLIOCENO PETROLOGÍA BENTOS FORAMINÍFEROS Magdalena paleodelta Paleoclimate Tubara Benthonic foraminifera Early Pliocene Sediment transport Lithofacies Geology stratigraphic - pliocene Petrology Benthos Foraminifera Molinares, C.E. Martinez, J.I. Fiorini c, F. Escobard, J. Jaramillo, C. Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
topic_facet |
TRANSPORTE DE SEDIMENTOS LITOFACIES ESTRATIGRAFÍA - PLIOCENO PETROLOGÍA BENTOS FORAMINÍFEROS Magdalena paleodelta Paleoclimate Tubara Benthonic foraminifera Early Pliocene Sediment transport Lithofacies Geology stratigraphic - pliocene Petrology Benthos Foraminifera |
description |
The Magdalena river transports one of the largest load of sediments per basin area in the world. Its delta position has changed several times over the Neogene. The Arroyo Piedras Section (169 m) in northern Colombia, contains part of the record of the Late Miocene to Early Pliocene evolution of the Magdalena paleodelta. The section was described and sampled for sedimentological and micropaleontological analyses. Based on lithofacies and benthic foraminifera content, the section was divided in three segments, and the upper segment was dated as Early Pliocene using planktonic foraminifera. The lower segment suggests siliciclastic sedimentation in a proximal prodelta/delta plain transitional environment. The intermediate segment suggests sedimentation in a lagoon and/or coastal swamp environment, whereas the upper segment is interpreted as the result of a transgression and subsequent deposition at the foreshore/upper shoreface environment, with a considerable decrease of terrigenous input. The decrease of sediment delivery to the delta produced by permanent El Niño-like conditions coupled with autocyclic processes could explain the transgressive pattern observed in the Arroyo de Piedras section during the Early Pliocene |
author2 |
Universidad EAFIT. Departamento de Geología Ciencias del Mar |
format |
Article in Journal/Newspaper |
author |
Molinares, C.E. Martinez, J.I. Fiorini c, F. Escobard, J. Jaramillo, C. |
author_facet |
Molinares, C.E. Martinez, J.I. Fiorini c, F. Escobard, J. Jaramillo, C. |
author_sort |
Molinares, C.E. |
title |
Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
title_short |
Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
title_full |
Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
title_fullStr |
Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
title_full_unstemmed |
Paleoenvironmental reconstruction for the lower Pliocene Arroyo Piedras section (Tubará e Colombia): Implications for the Magdalena River e paleodelta’s dynamic |
title_sort |
paleoenvironmental reconstruction for the lower pliocene arroyo piedras section (tubará e colombia): implications for the magdalena river e paleodelta’s dynamic |
publisher |
Elsevier |
publishDate |
2012 |
url |
http://hdl.handle.net/10784/1595 |
long_lat |
ENVELOPE(-62.933,-62.933,-64.900,-64.900) |
geographic |
Piedras |
geographic_facet |
Piedras |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
Journal of South American Earth Sciences, Volume 39, November 2012, Pages 170-183 10.1016/j.jsames.2012.04.007. 0895-9811 http://hdl.handle.net/10784/1595 |
op_rights |
info:eu-repo/semantics/restrictedAccess Acceso restringido |
container_title |
Journal of South American Earth Sciences |
container_volume |
39 |
container_start_page |
170 |
op_container_end_page |
183 |
_version_ |
1766170196582596608 |