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Fossil leaves from the last interglacial in Central-Southern Chile: Inferences regarding the vegetation and paleoclimate

Citation

Astorga, G and Pino, M, Fossil leaves from the last interglacial in Central-Southern Chile: Inferences regarding the vegetation and paleoclimate, Geologica Acta, 9, (1) pp. 45-54. ISSN 1695-6133 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 Geologica Acta

DOI: doi:10.1344/105.000001649

Abstract

The continental equivalent of the most temperate part of the last interglacial (MIS 5e) is called Valdivia in southern Chile. It is characterised by extensive terraces mostly composed of detrital sediments and pyroclastic flows. Peat deposits are found within these terraces. In this paper we analyze the leaf architecture of fossil leaves collected from a peat layer at the base of the Mancera interglacial sequence, on Mancera Island, off the coast of Valdivia (near 40 degrees S). The stratigraphic position, the presence of in situ logs and the composition of the plant species found therein suggest that the accumulation of plant remains occurred in a continental, palustrine environment. The plant morphotypes reveal an unusual mixture of species belonging to the cool temperate North Patagonian Forest and to the more thermophilous vegetation, represented by Valdivian Rain Forest. Both types of forest are currently found in the Coastal Range at different altitudes. The Mancera flora associations suggest a gradual response of the vegetation to the glacial-interglacial transition, and indicate that this coastal area could have been a refuge during the penultimate glacial period. A similar situation has been described for the last glaciation-Holocene transition.

Item Details

Item Type:Refereed Article
Keywords:Interglacial. Flora. Leaves. Chile. South America.
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Phycology (incl. Marine Grasses)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Astorga, G (Miss Giselle Astorga)
ID Code:78097
Year Published:2011
Web of Science® Times Cited:4
Deposited By:Plant Science
Deposited On:2012-06-14
Last Modified:2012-08-30
Downloads:0

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