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Glaciation - Coggle Diagram

- - - - Formation:
        
        Step 1: start as sheltered hollows near the top of a mountain. Snow collects here and compresses into glacial ice. Snow accumulates in hollow and compresses into ice.
        
        Step 2: Ice moves downhill. As it moves, it is plucking and abrading. Freeze-thaw and plucking cut away back wall. Abrasion deeps the hollow. Moraine is left at the end of the glacier. Leading to a deep, semi-circular hollow forming a corrie.
        
        Step 3: It has a steep back wall and small lip. There is a jagged summit, steep back wall, scree, moraine, a deep rock basin, and when the ice melts a small lake might be left called a tarn.
    - - Formation:
        
        Before and during an ice age: There are rounded hills, and then when the glacier comes the back walls retreat due to freeze-thaw and plucking.
        
        After ice age: There is a narrow ridge in the middle, with two corries either side and often a tarn in them.
    - - Formation:
        
        step 1: There is a rounded summit, and three corries on each side of the hill.
        
        Step 2: There is a peak on the top called a pyramidal peak, with three corries, and three arêtes.
    - - Formation:
        
        Step 1: A glacier is formed when snow compresses into ice in a north-facing hollow.
        
        Step 2: As the glacier moves down the river's valley, the valley is eroded through plucking and abrasion. Plucking is when rocks are pulled out of the valley walls by the ice, and abrasion is the wearing away of rocks on the bottom of the valley under the ice. Erosion by the glacial ice makes the valley sides steeper and straighter through plucking, and makes the valley floor flatter and deeper through abrasion.
        
        Step 3: The interlocking spurs change to truncated spurs as the glacier is eroded them until they have been cut off with very straight sides.
        
        Step 4: Once all the ice has melted a large u-shaped valley remains, with often a misfit stream (which is a stream that is too small for it's valley) or a ribbon lake.
  - - - lateral moraine: when material gathers at the side of a glacier
        
        medial moraine: when two glaciers meet, two lateral moraines join
        
        terminal moraine: builds up at the snout of the glacier - marking the furthest point reached by the glacier
        
        ground moraine: eroded material that was dragged along the base of the glacier (underneath it)
        
        subglacial moraine: material under the ice
        
        englacial moraine: material inside the glacier (got there by falling into crevasses or falling and getting covered by snow)
        
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