The Late Medieval and Early Modern periods in the Netherlands are marked by an upsurge in the production, use and repurposing of casks in cities. This is inextricably linked with the growing marine... Show moreThe Late Medieval and Early Modern periods in the Netherlands are marked by an upsurge in the production, use and repurposing of casks in cities. This is inextricably linked with the growing marine and riverine trade markets and the increase in artisan production. Casks have been found on shipwrecks, where they were used as containers for merchandise (primary purpose) and in urban areas, where they were repurposed as shafts for wells or cesspits (secondary purpose). As a result, the initial production phase of the lifecycle of casks often remained undetected. This study aims to generate an overview of the dendrochronological studies conducted in the past decades by Dutch dendrochronologists on casks from Dutch archaeological context, in which the felling year of the wood used to construct the casks can be dated from the 12th to 18th centuries, to gain insight into their production by coopers. The first objective is to better understand the diverse provenance areas detected in the coopers’ timber, after which the diachronic developments in the use of the timber from specific provenance areas can be addressed. The main objective is to assess whether it is possible to distinguish locally produced casks from casks used to import merchandise, which was successful in some cases. In addition to the dendrochronological and archaeological data, archival sources were used to contextualize and substantiate the analyses and interpretations. Show less
The use of fire is considered to be one of the most important cultural innovations in human evolution. Understanding the taphonomy of fire remains is an important prerequisite for valid... Show moreThe use of fire is considered to be one of the most important cultural innovations in human evolution. Understanding the taphonomy of fire remains is an important prerequisite for valid interpretations of hominin fire-related behaviour. Presented here are the results of a series of laboratory-based experiments testing the effect of different pH conditions (acidic, neutral, alkaline) on the physical and chemical properties of heated bone (charred and combusted). By taking a fundamental-research approach the study gives insight into the specific effect of pH exposure and its underlying chemical processes, and provides data that can be applied to heated bone from any context and time period. Results show that diagenesis has a significant impact on the preservation potential of heated bones, as well as on the reliability of the analytical techniques used to reconstruct past heating conditions. The study provides reference data and a toolkit for the analysis of heated bone, that explicitly takes diagenesis into account, and in doing so offers a significant improvement to the accuracy with which we can reconstruct heating conditions and fire-related human behaviour in the past. Show less
We live in the digital era, and archaeologists are increasingly engaging with 'big' data. A recent project at Oxford sought new answers about the landscapes of early medieval England from the... Show moreWe live in the digital era, and archaeologists are increasingly engaging with 'big' data. A recent project at Oxford sought new answers about the landscapes of early medieval England from the longue durée. Show less
The oral cavity is a heterogeneous environment, varying in factors such as pH, oxygen levels, and salivary flow. These factors affect the microbial community composition and distribution of species... Show moreThe oral cavity is a heterogeneous environment, varying in factors such as pH, oxygen levels, and salivary flow. These factors affect the microbial community composition and distribution of species in dental plaque, but it is not known how well these patterns are reflected in archaeological dental calculus. In most archaeological studies, a single sample of dental calculus is studied per individual and is assumed to represent the entire oral cavity. However, it is not known if this sampling strategy introduces biases into studies of the ancient oral microbiome. Here, we present the results of a shotgun metagenomic study of a dense sampling of dental calculus from four Chalcolithic individuals from the southeast Iberian peninsula (ca. 4500–5000 BP). Interindividual differences in microbial composition are found to be much larger than intraindividual differences, indicating that a single sample can indeed represent an individual in most cases. However, there are minor spatial patterns in species distribution within the oral cavity that should be taken into account when designing a study or interpreting results. Finally, we show that plant DNA identified in the samples is likely of postmortem origin, demonstrating the importance of including environmental controls or additional lines of biomolecular evidence in dietary interpretations. Show less
