INVESTIGADORES
CONTRERAS silvina Andrea
artículos
Título:
Late Quaternary vegetation history based on phytolith records in the eastern Chaco (Argentina)
Autor/es:
CONTRERAS, SILVINA A.; ZUCOL, ALEJANDRO F.
Revista:
QUATERNARY INTERNATIONAL
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2018 vol. 505 p. 21 - 33
ISSN:
1040-6182
Resumen:
The Chaco plain is a sedimentary basin filled by alluvial fans repeatedly generated by large rivers duringthe late Quaternary under diverse climatic conditions. The Eastern Chaco is characterized by semi-deciduousforests intermingled with extensive palm-savannas, grasslands, and wetlands. These vegetation patterns of theChaco have been proposed to be the result of the Pleistocene-Holocene alluvial dynamics of the plain as wellas of the intensive migration of fluvial belts of the main rivers. In this paper we present silica microfossilrecords from a Pleistocene-Holocene sedimentary sequence from the Eastern Chaco Region. Results show thatphytoliths were the most abundant elements compared to the other siliceous and non-siliceous microfossils.Differences in the microfossil associations suggest that climate changes along the Late Quaternary were givenmainly by humidity changes, and that rivers migrated mostly during the Holocene. Grasslands and wetlandspredominated in the described paleocommunities.
