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What Is Crag And Tail;How Can We Recognize It

What Is Crag And Tail;How Can We Recognize It

Crag and Tail, term applied to a peculiar formation of hills in which one side forms a steep and precipitous cliff, while the other ‘tails’ away in a gentle slope. This is due to glacial action on rocks of varying hardness, the harder rocks (generally igneous, such as dolerite or basalt) having resisted denudation and so protecting the softer rocks on the lee side.

The ‘crag’ thus generally faces the direction from which the ice came, while the ‘tail’ faces the direction in which it was advancing. The phenomenon is very prevalent in the lowlands of Scotland and especially round Edinburgh; the Castle Rock of Edinburgh and the Abbey Craig of Stirling are two of the most famous examples of this formation.

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