A dictionary of glaciation The Baltoro Glacier in northern Pakistan © 2005 Guilhem Vellut ©

G is for … Glacier A large river of ice which moves very slowly downhill. They form where the accumulation of snow is more than the ablation or melting. An example is the Aletsch Glacier in Switzerland. The Aletsch Glacier in Switzerland © 2005 Dirk Beyer ©

What do these glaciation key words mean? ablation abrasion arête bergschrund boulder clay cirque corrie crevasse cwm drumlins erratic fjord freeze-thaw ground moraine hanging valley ice age interglacial lateral moraine lip misfit stream moraine outwash plain pyramidal peak ribbon lake roches moutonnées rotational movement scree sea level changes snout snowline tarn terminal moraine till truncated spur U shaped valley valley glacier ©

Student task Your task is to produce a PowerPoint dictionary of glaciation that you can use for exam revision. It must cover all aspects of glaciation including: processes: erosion, transportation and deposition landforms: from arêtes to the zone of ablation case studies: what examples can you remember? ©

Instructions Make one slide only for each glaciation key word or phrase. However, you can have more than one slide for each letter, and none for some letters. Start each slide as follows:  A is for …  B is for …  C is for … etc. ©

Student task Look at the sample slides before you start. Don’t forget to access different sources including: your notes textbooks the internet. ©

A is for … Arête A thin knife-edged ridge of rock dividing two glacial valleys or corries, e.g. Striding Edge on Helvellyn in the Lake District. © 2008 Richard West ©

B is for … Bergschrund Where the ice wall at the head of a glacier (to the right of the climbers) has separated slightly from the back wall of its corrie. © 2006 Martin F ©

B is for … Baltoro Glacier This glacier is located in the Karakorum mountains of Pakistan. At 62 kilometres long, it is one of the longest outside of the polar regions. © 2005 Guilhem Vellut ©