Widespread ethnographic evidence exists for the addition of animal dung to clay during the process of ceramic production. However, conclusive evidence of dung tempering in archaeological ceramics is relatively rare. The aim of this study is to ascertain whether, and under which conditions, dung tempering of pottery is identifiable. To answer these questions, we assessed whether a combination of micro-particle analysis in loose sediment and thin-section petrography can reveal the addition of dung to the clay paste by focusing on faecal spherulites, ash pseudomorphs, phytoliths and coprophilous fungal spores. We analysed several series of experimentally produced ceramic briquettes tempered with different types of dung and dung ash, which were fired at a range of increasing temperatures. Our study shows that the identification of dung tempering represents a challenge, and it depends on a number of different factors, among others the original presence of dung markers in the dung used, the manufacturing process, the firing temperatures and the firing atmosphere. Overall, through a multidisciplinary approach, our work clarifies a variety of issues connected to the identification of dung in ancient pottery, highlighting the role of faecal spherulites as the most promising proxy.
Bibliographical noteFunding Information:
This work was supported by the Excellence Initiative of the Eberhard Karls Universität Tübingen and the Ministry for Science, Research, and Art of Baden-Württemberg. SGA’s work has been funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie H2020-MSCA-IF-2017, grant agreement number 794823, MapDung project. We would like to thank Christoph Berthold, Beatrice Boese, Marco Cocuccioni, Aspen Cooper, Jörg Fischer, Carlotta Gardner, Lars Heinze, Eirini Koutouvaki, Rosi Manthey, Arvin Raj Mathur, Marco Müller, Hannes Napierala, Klaus Nickel, Lars-Ole Schmutz, Martin Rogier, Johannes Seidler for their help and useful feedback.
© Association for Environmental Archaeology 2020.
- Dung tempering
- ceramic petrography
- dung fungal spores
- experimental archaeology
- faecal spherulites
- pottery technology
ASJC Scopus subject areas
- Environmental Science (miscellaneous)