Col De Vallée Etroite
In geomorphology, a col is the lowest point on a mountain ridge between two Summit, peaks.Whittow, John (1984). ''Dictionary of Physical Geography''. London: Penguin, 1984, p. 103. . It may also be called a Gap (landform), gap. Particularly rugged and forbidding cols in the terrain are usually referred to as notches. They are generally unsuitable as mountain passes, but are occasionally crossed by mule tracks or climbers' routes. The term col tends to be associated more with mountain rather than hill ranges. It is derived from the French ''col'' ("collar, neck") from Latin ''collum'', "neck". The height of a summit above its highest col (called the key col) is effectively a measure of a mountain's topographic prominence. Cols lie on the line of the drainage divide, watershed between two mountains, often on a prominent ridge or arête. For example, the highest col in Austria, the ''Obere Glocknerscharte'' ("Upper Glockner Col", ), lies between the Kleinglockner () and Grossglock ...
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