The process sedimentology of tills is crucial to the understanding of the glacier ice-bed interface as a complex depositional, erosional and shear boundary layer. Consequently, it also plays a central role in deciphering the genesis of enigmatic subglacial bedforms such as drumlins, flutings and ribbed terrain. Yet, unlike the study of other boundary layers such as those that operate at the bed of fluvial, aeolian and deep water systems, our knowledge of subglacial process-form relationships is relatively impoverished, largely due to the inaccessibility of glacier and ice sheet beds. Notwithstanding the important contributions now being made to this research problem by remotely sensed and localized borehole observations as well as reductionist laboratory experiments, it is critical that glacial scientists continue to refine their interpretations of ancient archives of subglacial processes, specifically those that are represented by tills and associated deposits, as these archives form the most widespread and accessible record of processes at the ice-bed interface.This book addresses all the key issues related to the topic through critical reviews of the till literature, laboratory and experiment based assessments of subglacial processes, and the theoretical constructs that have emerged from process sedimentology. These deliberations are then employed in the erection of a contemporary till nomenclature in which process-form relationships are founded in a coherent synthesis of a wide range of knowledge bases. The Wiley-Blackwell Cryosphere Science Series comprises volumes that are at the cutting edge of new research or provide a focused interdisciplinary reviews of key aspects of the science.   

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