By the end of today's lessons you will be able to recognize Arêtes and explain the formation of glacial troughs and hanging valleys. Key Words; Glaciated trough Truncated spur Hanging valley. Glaciated Landforms. What’s this?. Aretes. Formation of an arête.
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Arêtes are ‘knife-edged’ ridges formed between two corries.
What are the characteristics of a glacial trough?
steep valley sides
The river that flows through the valley after the ice age is described as a misfitstream.
Between truncated spurs are hanging valleys which have not been eroded as deeply as the main valley.
Interlocking spurs are truncated as the glacier cuts straight through the landscape.
wide and flat valley floor
The floor of the tributary valleys is eroded at a slower rate than that of the main valley.
When the ice melts the tributary valley is left hanging above the main valley.
The stream in the hanging valley will now fall as a waterfall into the main valley.
What evidence is there to suggest that this valley has been shaped by ice?
Produce an annotated sketch to show that this is a glaciated valley.
Label the physical landforms and briefly explain their formation.