This paper considers how the data returned by radiocarbon analysis of wood-charcoal mortar-entrapped relict limekiln fuels (MERLF) relates to other evidence for the construction of medieval northern European masonry buildings. A review of previous studies highlights evidence for probable residuality in the data and reflects on how this has impacted on resultant interpretations. A critical survey of various wood-fired mortar materials and lime-burning techniques is then presented, to highlight evidence suggesting that a broad spectrum of different limekiln fuels has been exploited in different periods and that growth, seasoning, carriage and construction times are variable. It is argued that radiocarbon analysis of MERLF fragments does not date building construction directly and the heterogeneity of the evidence demands our interpretations are informed by sample taphonomy. A framework of Bayesian modelling approaches is then advanced and applied to three Scottish case studies with contrasting medieval MERLF assemblages. Ultimately, these studies demonstrate that radiocarbon analysis of MERLF materials can generate reasonably precise date range estimates for the construction of medieval masonry buildings which are consistent with other archaeological, historical and architectural interpretations. The paper will highlight that these different types of evidence are often complementary and establish that radiocarbon dated building materials can provide an important focus for more holistic multidisciplinary interpretations of the historic environment in various periods.
This article concerns the continued documentation of prehistoric and/or historic artifacts from four sites in the Saline Creek drainage basin in the Post Oak Savannah in northern Smith County, Texas. Perttula and Walters discussed an earlier analysis of a set of collections from these same sites. Saline Creek is a northward-flowing tributary to the Sabine River. The sites are ca. 10 km south of the confluence of Saline Creek with the Sabine River. Saline Creek enters into the Sabine River about 6 km east (downstream) of the confluence of another major tributary, Lake Fork Creek, with the river.
An investigation of Aros Castle (NM 56287 44989) was undertaken which included low-level survey of the site’s north-west block followed by lab-based analysis of a mixed assemblage of building material samples. The study presents the first independent evidence relating to the chronology of building construction on the site and reveals the wide range of techniques and materials exploited during that process. The results are consistent with surviving documentary, architectural and art-historical evidence, and highlight the importance of the site’s masonry structures for the mediation and display of Clan Donald power during their later medieval floruit as Lords of the Isles and Earls of Ross.
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The results of a short program of landscape, buildings and materials analysis undertaken at Achanduin Castle, Lismore, Scotland (NM 8043 3927) are presented from the pilot phase of the Scottish Medieval Castles & Chapels C14 Project (SMCCCP). The study presents the first independent chronological evidence relating to the construction of this important medieval building, by radiocarbon analysis of a limited assemblage of Mortar-Entrapped Relict Limekiln Fuel (MERLF) fragments. Informed by a wider investigation of structural phasing and sample taphonomy, these measurements are constrained within a series of different Bayesian models, to generate a range of comparative estimates for the building’s constructional chronology. The precision with which the construction of this building can now be dated, from other evidence associated with the site, makes the Achanduin Castle study a useful point of reference for wider materials research.
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