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This paper presents a quantification method for archaeological molluscs using fragmentation categories. By employing the data from nine prehistoric sites (13 000 to 5000 bp ; 15 700 to 5700 cal bp ) in Cantabrian Spain (northern Spain), it has been shown that traditional methods, based on one or two anatomical elements, systematically produce a loss in the minimum number of individuals (MNI) that is sometimes significant. This paper also proposes using fragmentation categories in the calculation of the fragmentation index. In addition, based on these indices, a reflection is made on the difficulty involved in associating the amount of fragmentation of the shells with the taphonomic processes that have occurred at the archaeological sites, especially in discerning which agents have caused the fragmentation.  相似文献   
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Here, we provide the first report on the ages of 54 archaeological levels in 38 caves in northern Spain by means of the aspartic acid d /l ratio measurements in Patella shells, with good results. For this purpose, we developed an age calculation algorithm that allows the numerical dating of deposits from other archaeological localities in the area and nearby regions. We conclude that the sample size—that is, the number of shells analysed within a single level—reinforces the importance of analysing numerous specimens per horizon and the understanding of the time‐averaging concept. The ultrastructure of different species of Patella shells was also studied, showing calcite in their apexes and aragonite at their margins.  相似文献   
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ABSTRACT. This article presents a methodological exercise for the study of women in the nationalisms implied in the making of the Mexican nation. Bearing in mind the body of literature produced from an historical perspective, we have identified three types of nationalisms: the wars of independence, the nation‐building process and the multicultural nation. After discussing each type, the strategy proposed would apply the typology of women's roles and intersections of nationalism (Nira Yuval‐Davis and Floya Anthias). Such combined typologies allow us to identify the multiple interactions of women and the nation. We have empirically recourse to two characterisations of women: as heroines, and as intellectual creators of the nation. By looking at the role played by these female characters we observe how nationalism interacts with the current of ideas, thoughts or intuitions held by women.  相似文献   
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