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Palaeoenvironmental forcing during the Middle–Upper Palaeolithic transition in central-western Portugal

Published online by Cambridge University Press:  20 January 2017

Thierry Aubry ,
Luca A. Dimuccio ,
Miguel Almeida ,
Maria J. Neves ,
Diego E. Angelucci  and
Lúcio Cunha
Thierry Aubry
Affiliation:
IGESPAR-IP, Parque Arqueológico do Vale do Côa, Avenida Gago Coutinho e Sacadura Cabral, 19-A, 5150-610 Vila Nova de Foz Côa, Portugal
Luca A. Dimuccio*
Affiliation:
Centro de Estudos em Geografia e Ordenamento do Território (CEGOT), Departamento de Geografia, Faculdade de Letras, Universidade de Coimbra, Praça da Porta Férrea, 3004-530 Coimbra, Portugal Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Largo Marquês de Pombal, 3000-272 Coimbra, Portugal
Miguel Almeida
Affiliation:
iDryas/Dryas Octopelata, Rua Aníbal de Lima, 168, 3000-030 Coimbra, Portugal
Maria J. Neves
Affiliation:
iDryas/Dryas Octopelata, Rua Aníbal de Lima, 168, 3000-030 Coimbra, Portugal Centro de Investigação em Antropologia e Sáude (CIAS), Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal
Diego E. Angelucci
Affiliation:
Dipartimento di Filosofia, Storia e Beni Culturali, Università di Trento, Piazza Venezia 41, 38122 Trento, Italy
Lúcio Cunha
Affiliation:
Centro de Estudos em Geografia e Ordenamento do Território (CEGOT), Departamento de Geografia, Faculdade de Letras, Universidade de Coimbra, Praça da Porta Férrea, 3004-530 Coimbra, Portugal
*
⁎Corresponding author. Present address: Departamento de Geografia, Faculdade de Letras, Universidade de Coimbra, Praça da Porta Férrea, 3004-530 Coimbra, Portugal. Fax: +351 239836733.
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Abstract

Geoarchaeological analysis of the Middle and Upper Palaeolithic record preserved in cave, rock-shelter and open-air sites in the northern sector of the Meso-Cenozoic of the Western Iberian Peninsula margin (Portugal) reveals several disconformities (erosive unconformities), hiatuses and surface stabilization phases. A recurrent disconformity, dated to ca. 29,500–32,000 cal yr BP, in the time range of Heinrich event 3, must correspond to a main erosive event related to the impacts of climate change on the landscape, including a reduction in vegetation cover and altered precipitation patterns, with the consequent accelerated down-cutting by stream systems, slope reactivation and endokarstic reorganisation, causing the erosion of sediments and soils accumulated in cave, rock-shelter and open-air sites. These processes create a preservation bias that may explain why Early Upper Palaeolithic finds in primary deposition context remains exceptional in the carbonate areas of central-western Portugal, and possibly elsewhere in the other places of Iberia. The impact of such site formation processes must therefore be duly considered in interpretations of the current patchy and scarce archaeological record of the Middle-Upper Palaeolithic transition in south-western Iberia.

Keywords

DisconformityMiddle-Upper Palaeolithic transitionHeinrich eventsGeoarchaeological approachKarstic cavesRock-shelterscentral-western Portugal
Type
Research Article
Information
Quaternary Research , Volume 75 , Issue 1 , January 2011 , pp. 66 - 79
Copyright
University of Washington

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