Lithic stories of broken relations after the Storegga tsunami in Mesolithic western Norway?

Major changes in lithic technologies are often explained by either migration or crisis. Here we argue that continuity and minor adjustments in lithic production can tell equally dramatic tales of altered social situations. We base our interpretations on identified lithic blade production concepts and raw materials at 30 sites dating 7500–5000BC, i.e. from before and after the massive Storegga tsunami hit the coast of western South-Norway around 6150BC. Regional continuation, but also local variations in lithic production are interpreted inspired by a machine-oriented ontological framework. The tsunami disrupts the environment, society and its lithic traditions are affected. Although no immediate major breaks are observed, sometime after the tsunami, societies or lithic production as ‘machines’ in separate regions had begun to hum to different tunes. We suggest that variation in tsunami impact had created differing local social contexts which in turn pushed the lithic traditions down diverging paths. [ABSTRACT FROM AUTHOR]