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Roberta Phillips

Arêtes- Steep sided knife edge mountain ridge often marking the edges of a corrie or the
watershed between two valleys (troughs)

Basal Sliding- Large scale and often quite sudden movement of a portion of ice usually
lubricated by sub glacial movement

Cold based glacier- Glacier where the…

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Glacial system- Inter relationships between components in a glacial environment, often
sub- divided into inputs, processes and outputs

Glacial troughs- Glacially- enlarged river valley characterised by having a broad flat base and
steep sides (U shaped)

Glacial Budget- Balance between inputs (accumulation) such as snowfall and avalanches

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Periglacial- Environments experiencing long cold winters and short warm summer ,
typically with frozen ground (permafrost) but not covered by ice(glacial)

Permafrost- Permanently frozen soil and rock a key characteristic of Periglacial environment

Pingos- Ice cored mounds found in Periglacial environments formed by the freezing of sub

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Roberta Phillips


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