Published online by Cambridge University Press: 04 March 2013
This paper is based on the 2009 Europa lecture which concentrated on the issues surrounding the Early Holocene colonisation of Ireland and placed it both in a broader European context as well as asking why the initial settlement of Ireland should take place so late. It also reconsidered the reasons why there was a significant change in technology within the Irish Mesolithic. This paper suggests that over-emphasis has been placed on the Irish ‘Early’–Later Mesolithic change which had been thought to take place at a very specific point in time. Instead it is suggested that changes began to take place soon after settlement began in Ireland and that many of the classic Mesolithic type fossils, most notably microliths, began to vanish, perhaps around or just after 9000 years cal bp. It seems preferable to redefine the chronology of the Irish Mesolithic into two main phases the EARLIER and LATER Mesolithic with an, as yet undefined, chronological boundary between 8800 and 8600 cal bp. At the same time it recognises that there are significant changes (facies) within each of the major phases, some of which could even be regional. It should also be noted that not all of the facies need necessarily be associated with a distinct range of obvious type fossils.