Dung detective! A multi-scalar, multi-method approach to identification and analysis of ancient faecal material.

Abstract

Ancient faecal material is becoming a highly valuable more frequently investigated proxy with which to address a wide range of research questions. With advancing scientific methodologies it is becoming easier to identify and to analyse. The aim of this paper is to use a set of archaeological and ethnographic case studies to illustrate and evaluate the range of methods that can be used in conjunction with each other to aid investigation of archaeological faecal material. This multi-scalar and multi-method approach uses portable x-ray fluorescence (pXRF), spot sampling and smear slide analysis, micromorphology, gas chromatography mass spectrometry (GC-MS), environmental scanning microscopy with energy dispersive x-ray spectroscopy (ESEM-EDX), and phytolith analysis. The case studies presented here focus on the Neolithic because of this unique opportunity to examine concentrations of animal dung from managed or early domesticated herds. This research illustrates a range of the methods that can be used in conjunction with each other to locate, identify and analyse faecal material. The results demonstrate that an integrated, multi-scalar, multi-methodological approach enables detection, identification, and investigation of a range of faecal attributes and provides new insights into key issues and themes on environment, animal management, diet, health, the built environment and energy sources. This integrated methodology and pilot study highlights two main recommendations. Firstly, modern faecal comparative material should always be consulted within the study region as a baseline for identifying and classifying different types of faecal material. Secondly, micromorphology and GC-MS samples are always vital proxies in further investigations to confirm the nature and identity of the dung sources once potential sample locations have been identified.