CHAPTER 9: GLACIAL PROCESSES, PATTERNS AND LANDFORMS
Back wall
Fig. 16 As the ice moves out of the corrie, its surface is stretched and this causes the ice to split into smaller crevasses on the ice surface (like splitting a chocolate-covered caramel bar described earlier). This is the main crevasse zone. However, because the ice moves at different speeds in different places crevasses form in many areas across its surface.
arête
Tarn
Fig. 19 Corries, arêtes and tarns at Upper and Lower Lough Bray, County Wicklow
Fig. 17 The corrie and tarn at Upper Lough Bray, CountyWicklow. Look at the map in Fig. 19 and work out which direction the photographer was facing when the above photograph was taken.
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Fig. 18 The largest corrie in Ireland is Coumshingaun in the Comeragh Mountains. Its back wall is 700 m deep. The helicopter flying on the left-hand side of the photograph is dwarfed by it.
Fig. 20 Coumshingaun area showing corries and an arête