Corrie

• snow collects in north facing hollows on the side of a mountain as these areas are colder
• snow compresses into ice
• the glacier moves down due to gravity
• freeze thaw weathering erodes the back of the hollow. this is when melted ice gets into the cracks of the rock, freezes, then expands. eventually rock will break apart
• abrasion causes the base of the hollow to deepen as the rocks embedded in the glacier erode the hollow
• after ice melts an arm chair hollow is left. this is called a corrie
• water can gather in the hollow. this is called a corrie lochan
• example of a corrie is found on the north-eastern side of Helvellyn