Palaeoglaciological reconstructions, at scales ranging from local to continental scale, play a significant part in the development of

Figure 18.5 Landsystems model of the main glacigenic features and sediments on a passive continental margin, exemplified by the northern Norwegian shelf (from Vorren, 2003).

models of global palaeoclimate. However, the great spatial and temporal complexity of glacial processes and forms have necessitated the compilation of process-form models or landsystems that relate to various glaciation styles and systems, which may then be applied to specific physiographic and climatic settings. A number of contemporary glacierized landscapes have been used as modern analogues for the landform-sediment assemblages produced by different glaciation styles and ice dynamics in differing climatic, geological and topographic settings. The identification of modern landsystems, for example those pertaining to active temperate glacier snouts, surging glaciers, ice streams, valley glaciers, subaqueous depocentres, arid polar glaciers and plateau icefields (Evans, 2003a), provide glacial geomor-phologists with the criteria to decipher palaeoglacier dynamics and former glacier-climate relationships in ancient glaciated terrain.

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