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Upland Glaciated features, Link Title - Coggle Diagram
Upland Glaciated features
Ribbon lake
A ribbon lake is a large, narrow lake occupying a U-shaped valley. It forms in a hollow where a glacier has more deeply eroded less resistant rock or it may fill up a valley behind a wall of moraine across the valley.
U shaped and V shaped valleys
Glaciers cut distinctive U-shaped valleys, or troughs, with a flat floor and steep sides. The glacier uses the processes of plucking and abrasion to widen, steepen, deepen and smooth 'V'-shaped river valleys into a 'U' shape.
Pyramidal Peak
A pyramidal peak is formed when three corries form back to with each other. This creates a peak. To become a jagged and rocky peak freeze thaw occurs. Freeze thaw is when water forces its way into cracks in rocks and then freezes and expands causing the rocks to split apart.
Corrie
Initially, snow collects commonly in a north-facing hollow. This snow compacts itself into nevee which slowly forms a glacier. As the glacier expands it moves in a rotational direction and starts to erode the walls of the hollow. Through the processes of plucking and abrasion, the corrie walls steepen. Plucking is when rocks from the surface of the hollow freeze into the glacier and then move whilst abrasion is the rubbing of rocks and the glacier grinding them down.
Arete
An Arete is formed when two corries form side to side creating a small ridge in between them. the sides of an Arete are normally quite steep due to the shape of the surrounding corries.
Misfit Stream
Misfit streams/rivers meander through the flat, wide U-shaped floor. They have not eroded the valley, as they formed there after glaciation had carved out the much larger U-shaped valley.
Truncated spurs
Inter locking spurs are cut off by the movement of glacier down a valley leaving them truncated. a hanging valley is the same, it has been cut off by a glacier moving down a valley.
Plucking, Abrasion, Freeze thaw
Freeze thaw is when water forces its way into a crack in the rock and then freezes when temperatures rock and expands causing the rocks to expand and crack apart.
Plucking is where rocks freeze into a bottom of a glacier and when the galcier moves the rocks go with them
Abrasion is when rocks grind against the glacier or other rocks. It goes hand in hand with Plucking because rocks that have been plucked abrase with the rocks on the bottom of the glacier.
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