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- ARQUEOLIT: an open access lithotheque in Portugal [Resumo]Publication . Jordão, Patrícia; Soares, Sofia; Silva, Teresa
- Conteúdo paleontológico e identificação da proveniência de sílex de materiais arqueológicos calcolíticos do “Castro” do Zambujal (Torres Vedras, Portugal)Publication . Jordão, Patrícia; Pimentel, N.RESUMO: A paleontologia tem sido uma ferramenta poderosa nos estudos de proveniência de matérias-primas arqueológicas. A identificação do conteúdo paleontológico a três escalas (macro-, meso- e microscópica) contribui para a interpretação do ambiente deposicional. No estudo de proveniência dos materiais líticos do “Castro do Zambujal” (Torres Vedras, Portugal), foi recolhido sílex atribuído ao Cretácico (Cenomaniano) marinho e sílex atribuído ao Paleogénico continental. Nas amostras do Cenomaniano de Torres Vedras e de Sintra (30 km a sul) observaram-se texturas mudstone semelhantes, pobres em bioclastos, ao contrário das texturas wackestone/packstone de Lisboa (40 km a sul). No sílex do Paleogénico de Torres Vedras, texturas com rizoconcreções sugerem condições mais palustres, do que em Alenquer (20 km para Este) cujas texturas peloidais indiciam eventualmente um ambiente mais lacustre. Estudos petroarqueológicos apontaram para um abastecimento predominante em sílex do Cenomaniano (77%) e, em menor quantidade, do Paleogénico (23%). Esta abordagem contribuiu para detectar as rotas de mobilidade dessas comunidades há cerca de 5000 anos.
- Follow that blade!- Petroarchaeological proxies as indicators of human mobility during the Copper age of the SW of the Iberian Peninsula: Vila Nova de Sao Pedro case study (Portugal)Publication . Jordão, Patrícia; Neves, César; Mesquita Soares, Sofia; Morgado-Rodríguez, Antonio; Diniz, Mariana; Arnaud, José M.ABSTRACT: Petroarchaeological proxies of blades are a powerful tool for the study of mobility in prehistoric populations to deliver more information on the network relationships of exchange, particularly during the Copper age. However, it is only recently that the first petroarchaeological studies have begun in the SW of the Iberian Peninsula, concerning Recent Prehistory. A sampling of blades from Vila Nova de Sao Pedro, one of the main fortified settlements in Portuguese Estremadura, was used for petrographic and geochemical study. Following the same protocol, geological samples of flint and also igneous rocks were analysed. Additionally, a techno-typological approach was combined in order to characterize the blades types in circulation. This preliminary study traced the diverse and complex dynamics of blade production, which involved the collection of the most readily available Rio Maior flint and the regionally selected Caxarias flint. There were no significant differences in knapping techniques for these two types of flint. The most distant oolitic varieties from Subbetic Cordillera (within 500 km) and the igneous rocks from the Iberian Piryte Belt (within 250 km), particularly for large blades, were not debitated at the site. Due to the high numbers of those types of materials at the site, Vila Nova de Sao Pedro most likely played a significant role in the complex mobility networks of large blades, establishing itself as an aggregating site and possibly a distributor of these artefacts to the Southwest of the Iberian Peninsula. Considering the proximity and the quality of Rio Maior flint sources but also to the amount of raw materials at the site sourced from a long distance, this study shows that mobility is more influenced by cultural motivations than by the availability or quality of raw materials.