Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach

Two Pleistocene sedimentary units are recognized in the Corrientes province, Argentina: the Toropí and Yupoí formations. These sediments have proven productive for fossil vertebrates, but few macrofossils have been recovered. To remedy this situation, plant silica (phytoliths) were extracted from th...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Erra, Georgina, Osterrieth, Margarita Luisa, Zurita, Alfredo Eduardo, Francia, Analía, Carlini, Alfredo Armando
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2013
Materias:
Geología
Phytolith
Mesopotamia
Late pleistocene
Paleoenvironment
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/96375
https://ri.conicet.gov.ar/11336/76276
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-96375
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Phytolith
Mesopotamia
Late pleistocene
Paleoenvironment
spellingShingle Geología
Phytolith
Mesopotamia
Late pleistocene
Paleoenvironment
Erra, Georgina
Osterrieth, Margarita Luisa
Zurita, Alfredo Eduardo
Francia, Analía
Carlini, Alfredo Armando
Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
topic_facet Geología
Phytolith
Mesopotamia
Late pleistocene
Paleoenvironment
description Two Pleistocene sedimentary units are recognized in the Corrientes province, Argentina: the Toropí and Yupoí formations. These sediments have proven productive for fossil vertebrates, but few macrofossils have been recovered. To remedy this situation, plant silica (phytoliths) were extracted from the sediments, enabling a direct comparison of paleovegetation data and information based on previous study of vertebrates. The studied samples (n = 28) come from two profiles from the Toropí Stream (28°36'S; 59°02'W), near Bella Vista, Corrientes, from which two Quaternary mammals, Lestodon (Xenarthra) and Hippocamelus (Artiodactyla), have previously been excavated. All samples were productive and contained both non-plant biogenic silica (diatoms, sponge spicular, chrysophyte cysts) and phytoliths. Phytolith assemblages were dominated by morphotypes diagnostic of grasses, in particular C 3 pooids, C 4 chloridoids, and C 3 or C 4 panicoids (or related grasses in the PACMAD clade). Rare phytoliths of palms and other woody or herbaceous dicotyledonous angiosperms were also present. This combination of C 3 and C 4 grasses, and rare palms and other forest indicators, indicates grass-dominated habitats with groves with palms and other trees/shrubs along rivers, growing under a relatively warm and dry climate. This mixed plant community reflects shifting biogeographic affinity with the Chaco-Pampean plain and inter-tropical regions, respectively, linked to the frequent climatic-environmental fluctuations during the Late Pleistocene.
format Articulo
Preprint
author Erra, Georgina
Osterrieth, Margarita Luisa
Zurita, Alfredo Eduardo
Francia, Analía
Carlini, Alfredo Armando
author_facet Erra, Georgina
Osterrieth, Margarita Luisa
Zurita, Alfredo Eduardo
Francia, Analía
Carlini, Alfredo Armando
author_sort Erra, Georgina
title Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
title_short Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
title_full Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
title_fullStr Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
title_full_unstemmed Paleoenvironment of the Toropí Formation (Upper Pleistocene), Corrientes province (Mesopotamian region, Argentina): A phytolith approach
title_sort paleoenvironment of the toropí formation (upper pleistocene), corrientes province (mesopotamian region, argentina): a phytolith approach
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/96375
https://ri.conicet.gov.ar/11336/76276
work_keys_str_mv AT errageorgina paleoenvironmentofthetoropiformationupperpleistocenecorrientesprovincemesopotamianregionargentinaaphytolithapproach
AT osterriethmargaritaluisa paleoenvironmentofthetoropiformationupperpleistocenecorrientesprovincemesopotamianregionargentinaaphytolithapproach
AT zuritaalfredoeduardo paleoenvironmentofthetoropiformationupperpleistocenecorrientesprovincemesopotamianregionargentinaaphytolithapproach
AT franciaanalia paleoenvironmentofthetoropiformationupperpleistocenecorrientesprovincemesopotamianregionargentinaaphytolithapproach
AT carlinialfredoarmando paleoenvironmentofthetoropiformationupperpleistocenecorrientesprovincemesopotamianregionargentinaaphytolithapproach
bdutipo_str Repositorios
_version_ 1764820492069371904

Ejemplares similares