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Title: Geoarchaeology of Pleistocene open-air sites in the Vila Nova da Barquinha-Santa Cita area (Lower Tejo River basin, central Portugal)
Authors: Martins, António A. 
Cunha, Pedro P. 
Rosina, Pierluigi 
Osterbeek, Luiz 
Cura, Sara 
Grimaldi, Stefano 
Gomes, José 
Buylaert, Jan-Pieter 
Keywords: Palaeolithic; Pleistocene; Luminescence dating; Terraces; Tejo River; Iberia
Issue Date: 2010
Publisher: Elsevier
Project: info:eu-repo/grantAgreement/FCT/POCI/58120/PT/Fluvial Terraces, references to evaluate the fluvial incision and crustal uplift in central Portugal (western Iberia) 
info:eu-repo/grantAgreement/FCT/5876-PPCDTI/71361/PT/Transition landscapes: Settlement, Technology and Chrono-Stratigraphy of the transition to farming, in Central Portugal. 
Serial title, monograph or event: Proceedings of the Geologists’ Association
Volume: 121
Issue: 2
Abstract: This paper aims to provide insight into human occupation and landscape change during the Pleistocene in a central area of the Lower Tejo basin (Portugal). Detailed geomorphological mapping, coupled with lithostratigraphy, sedimentology and luminescence dating, supports the identification of a complete terrace staircase sequence. It consists of six gravely terraces located below the culminant (Pliocene) basin unit. A chronological framework for the sedimentary sequences and associated human industries is proposed and correlated with marine oxygen isotope stages (MIS): T1 terrace, not dated; T2, not dated; T3, >300 ka; T4, 300–160 ka (MIS8, MIS7 and MIS6); T5, 136–75 ka (MIS5); T6, 62–30 ka (MIS3); colluviumand aeolian sands, 30–14 ka (MIS2); valley fill deposits, 14 ka to present (MIS1). The oldest artefacts were found at the base of the T4 terrace, with the local stratigraphic level dated to 175 6 ka (Middle Pleistocene). The lithic assemblages collected from distinct stratigraphic levels (T4, T5 top, T6 terraces and colluvium) are characterized by the predominance of opportunistic technological choices, a feature that can be attributed partly to the preferential exploitation of the available raw material, dominated by local-sourced quartzites and quartz pebbles. The adaptation to local raw material (texture and volume), together with subsistence patterns and behaviours, could explain the rarity of Acheulian types (handaxes and cleavers) and picks in the T4 terraces of the Tejo tributaries; this is in contrast to the same terrace of the Tejo valley, in which these types are found. Interpretation of the environmental conditions (controlled by climate and glacio-eustatic sea-level changes) affecting the hunter-gatherer human groups is also presented
ISSN: 0016-7878
DOI: 10.1016/j.pgeola.2010.01.005
Rights: openAccess
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais

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