- Subject index
A cutting edge title from two world renowned academics
Chapter 12: Timescales
The timescales adopted in geomorphology fall well within the c.4.6 billion years of Earth history, with some being a mere season or even a single event. In addition to continuous timescales, discrete periods of Earth history have been utilized. Six hierarchical levels are formally defined geologically and these embrace the external or allogenic drivers for the long-term intrinsic or autogenic processes that have fashioned the Earth's surface, some parts of which still bear ancient traces, whereas others have been fashioned more recently or are currently active. Contemporary problems demand attention to recent timescales, the Quaternary and the Holocene, although these are less formally partitioned. Geomorphology-focused classifications have also been attempted with short, medium and long time-scales conceived in relation to system states. ...