In Part One of this volume reference has been made to models of landscape evolution, and of necessity these require consideration of timescales measured in years. Geomorphology does not have a monopoly of the methods involved in determining ages of past events, and it can be argued that these techniques are primarily the armoury of Quaternary geology. Indeed in their classic work Fluvial processes in geomorphology Leopold et al. (1964) made the assertion (p. 468) that 'much of geomorphology is stratigraphic geology'. However, in the British Isles, at least, Quaternary geology has been largely ignored by its parent over the last three decades, and research in this field has been dominated by geomorphologists.