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Absence of Last Glacial Maximum Records in Lowland Tropical Forests

Published online by Cambridge University Press:  20 January 2017

Marie-Pierre Ledru ,
Jacques Bertaux ,
Abdelfettah Sifeddine  and
Kenitiro Suguio
Marie-Pierre Ledru
Affiliation:
ORSTOM, 32 av. Henri Varagnat, 93143, Bondy Cedex, France
Jacques Bertaux
Affiliation:
ORSTOM, 32 av. Henri Varagnat, 93143, Bondy Cedex, France
Abdelfettah Sifeddine
Affiliation:
ORSTOM, 32 av. Henri Varagnat, 93143, Bondy Cedex, France
Kenitiro Suguio
Affiliation:
Instituto de Geociêcias, Caixa Postal 11, 34805 422-970, Sao Paulo, SP, Brazil
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Abstract

Environmental conditions of the lowland tropical forests during the last glacial maximum (LGM) between ca 20,000 and 18,000 14C yr B.P., are reevaluated in terms of dating control and lithology analyzed in seven pollen records from South America. The reevaluation shows that probably in none of the published records are LGM sediments present or abundant. This conclusion is based on the occurrence of abrupt lithologic changes coupled with changes in sedimentation rate interpolated from radiocarbon dates. These findings suggest that the LGM was represented probably by a hiatus of several thousand years, indicative of drier climates than before or after.

Keywords

Last Glacial Maximumtropical forestslithologysedimentologymineralogypalynology14C chronologySouth America
Type
Short Paper
Information
Quaternary Research , Volume 49 , Issue 2 , March 1998 , pp. 233 - 237
Copyright
University of Washington

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References

Absy, M.L, Cleef, A, Fournier, M, Martin, L, Servant, M, Sifeddine, A, Ferreira da Silva, M, Soubiès, F, Suguio, K, Turcq, B, Van der Hammen, T, 1991. Mise en évidence de quatre phases d'ouverture de la forêt amazonienne dans le sud-est de l'Amazonie au cours des 60000 dernières années. Première comparaison avec d'autres régions tropicales. Comptes Rendus Académie des Sciences de Paris Série 2. 312 673–678.Google Scholar
Barberi, M, 1994. Paleovegetação e paleoclima no Quaternário tardio da vereda de Águas Emendadas, DF. Univ. de Brası́liap. 93.Google Scholar
Beck, W.J, Récy, J, Taylor, F, Edwards, R.L, Cabioch, G, 1997. Abrupt changes in early Holocene tropical sea surface temperature derived from coral records. Nature. 385 705–707.CrossRefGoogle Scholar
Behling, H, 1997. Late Quaternary vegetation, climate and fire history from the tropical mountain region of Morro de Itapeva, SE Brazil. Palaeogeography, Palaeoclimatology, Palaeoecology. 129 407–422.CrossRefGoogle Scholar
Bertaux, J, Ledru, M.-P, Soubiès, F, Sondag, F, 1996. The use of quantitative mineralogy linked to palynological studies in palaeoenvironmental reconstruction: The case study of the “Lagoa Campestre” lake, Salitre, Minas Gerais, Brazil. Comptes Rendus Académie des Sciences de Paris Série 2. 323 65–71.Google Scholar
Colinvaux, P.A, De Oliveira, P.E, Moreno, J.E, Miller, M.C, Bush, M.B, 1996. A long pollen record from lowland Amazonia: forest and cooling in glacial times. Science. 274 85–88.CrossRefGoogle Scholar
Ferraz-Vicentini, K.R, Salgado-Labouriau, M.L, 1996. Palynological analysis of a palm swamp in Central Brazil. Journal of South American Sciences. 9/3/4 207–219.Google Scholar
Ledru, M-P, 1993. Late Quaternary environmental and climatic changes in central Brazil. Quaternary Research. 39 90–98.CrossRefGoogle Scholar
Markgraf, V, 1993. Climatic history of Central and South America since 18,000 yr B.P. Comparison of pollen records and model simulations. Global Climates since the Last Glacial Maximum. Univ. of Minnesota Press, Minneapolis, p. 357–385.Google Scholar
Martin, L, Bertaux, J, Correge, T, Ledru, M.-P, Mourguiart, P, Sifeddine, A, Soubiès, F, Wirrmann, D, Suguio, K, Turcq, B, 1997. Astronomical forcing of contrasting rainfall changes in tropical South America between 12400 and 8800 cal years B.P. Quaternary Research. 47 117–122.CrossRefGoogle Scholar
Oliveira, P.E, 1992. A Palynological Record of Late Quaternary Vegetational and Climatic Change in Southeastern Brazil. Ohio State Univ, Columbus. Google Scholar
Salgado-Labouriau, M.L, Ferraz-Vicentini, K, Martin, L, Soubiès, F, Suguio, K, Turcq, B, 1997. Late Quaternary vegetational and climatic changes in cerrado and palm swamp from Central Brazil. Palaeogeography, Palaeoclimatology, Palaeoecology. 128 215–226.CrossRefGoogle Scholar
Sifeddine, A, Bertrand, P, Fournier, M, Martin, L, Servant, M, Soubiès, F, Suguio, K, Turcq, B, 1994. La sédimentation organique lacustre en milieu tropical humide (Carajas, Amazonie orientale, Brésil): Relation avec les changements climatiques au cours des 60 000 dernières années. Bulletin Société Géologique de France. 165 613–621.Google Scholar
Sifeddine, A, Frölich, F, Fournier, M, Martin, L, Servant, M, Soubiès, F, Turcq, B, Suguio, K, Vollkmer-Ribeiro, C, 1994. La sédimentation lacustre indicateur de changements des paléoenvironnements au cours des 30 000 dernières années (Carajas, Amazonie, Brésil). Comptes Rendus Académie des Sciences de Paris, Série 2. 318 1645–1652.Google Scholar
Van der Hammen, T, Barelds, J, De Jong, H, De Veer, A.A, 1981. Glacial sequence and environmental history in the Sierra Navada Del Cocuy (Colombia). Palaeogeography, Palaeoclimatology, Palaeoecology. 32 247–340.CrossRefGoogle Scholar
Webb, R.S, Rind, D, Lehman, S.J, Healy, R.J, Sigman, D, 1997. Influence of ocean heat transport on the climate of the Last Glacial Maximum. Nature. 385 695–699.CrossRefGoogle Scholar