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There are some characterisitic features of landforms that you have to be able to recognise from OS map extracts. Below are some of the key feaures you need recognise:

Corries
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Glacial Trough

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U-shaped valleys are easy to find on an O.S. map (provided that you know the map extract is a glaciated upland).
Look for the steep valley sides – indicated by the closeness of the contours. The valley sides should be roughly straight and parallel.
The flat valley floor is easily identified – it usually has few contours and will look ‘white’. The valley floor may be occupied by a ribbon lake or a misfit stream.

Aretes

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Pyramidal Peaks

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Hanging Valley

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