ABSTRACT
The process of bedrock fracture and removal beneath a sliding glacier. Transitory stress concentrations produced, for example, by embedded stones within the ice, may enlarge cracks and displace fragments that are then incorporated in the base of the glacier (Figure Q.1). The process may be facilitated by prior freeze–thaw bedrock fracturing, aided by high basal water pressures. Bedrock fracture, displacement and transportation of clasts in a cave beneath Grosser Aletschgletscher, Valais, Switzerland (October 2010). https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315373157/95d5ad9e-a71d-4f11-a609-2c025b95638b/content/figq_1.jpg"/>
