The ‘invisible’ hearths: a contribution to the discernment of Mesolithic non-structured surface hearths

In the cover sand area of the NW European plain very little is known about fireplaces within Mesolithic settlement areas. Yet the frequent occurrence of burnt ecofacts (hazelnut shells and bone) and artefacts (flint and quartzite) clearly indicates the presence of (surface) hearths on nearly every campsite. Most of these hearths are non-structured and are thus barely visible in the soil. Furthermore in most spatial studies minimal effort has been made to locate these ‘invisible’ hearths as accurately as possible. This paper discusses the potential and modalities of detailed spatial analysis of burnt artefacts and ecofacts, using recently obtained archaeological and experimental evidences. It is concluded that such an analysis can offer interesting insights into the dynamics of Mesolithic hearths.