Middle and Late Mesolithic microblade technology in eastern Norway: Gradual development or abrupt change?

Abstract

The study of Mesolithic blade industries in northern Europe has contributed to gaining a deeper insight into prehistoric technological choices by applying a dynamical technological approach. In this study, the authors applied this approach to Middle and Late Mesolithic microblade industries in eastern Norway in order to study regional developments. A total of 45 pressured cores derived from seven open-air sites excavated by the Museum of Cultural History in Oslo (2010–2012) were analyzed taking into account metrical values and technological traits. The results show three distinct phases in the studied material. The earliest phase (c. 7500– 7200 cal BC) was characterized by a standardized conical core concept. The second phase (c. 7200–6100 cal BC) showed both conical and single fronted cores, while in the youngest phase (c. 5400–3900 cal BC) the single fronted core concept was predominant. Based on previous experimental research, the authors argue that this reflects a slow transition from the use of V-shaped holding devices in the Middle Mesolithic to pocket devices and handheld reduction techniques in the Late Mesolithic.