The formation of glaciated upland features
Erosion processes form corries, arêtes and pyramidal peaks
Corries
Formation of a corrie
- Snow gathers in mountain The dip in a mountain where snow and ice gather. - especially north facing hollows - it builds up and compacts to ice.
- As the ice moves downhill it sticks to the back wall and plucks rock from the surface, steepening them.
- Freeze thaw action also loosens rocks on the back wall.
- Ice moving with loose rock acts like sandpaper and deepens the hollow by abrasion.
- Ice in a corrie has a The circular movement of a glacier inside the hollow of a corrie. movement which means that the front of the corrie is less The wearing away of the landscape. and a lip forms.
- The glacier melts, often leaving a A small lake found inside a corrie (also known as a corrie loch)./A small lake found inside a corrie (also known as a tarn)..
