This book presents a comprehensive introduction to the processes that operate in present periglacial environments, and how this contributes to our understanding of former periglacial environments. It includes accounts not only of the nature of frozen ground and frost-action processes, but also of the operation of slope, fluvial, aeolian and coastal processes in cold environments. It is organized in six parts. Part 1 (chapters 1--2) introduces the historical and scientific context of periglacial geomorphology and the nature of periglacial environments. Part 2 (chapters 3-5) addresses the...