A Crag. Explanation

This is a explanation of the definition of what a Crag is. I found it on a info site.

A cliff is a vertical rock formation, often pretty steep, which attracts adventure sports enthusiasts the world over to have a go at climbing, rappelling, trekking and hiking. It is caused by the processes of erosion and weathering of landforms. Cliffs, however, are usually made up of rocks that are resistant to erosion and weathering, but ironically, they have been categorised as erosion landforms from experts in the field of geography.

A crag on a cliff is defined as that part of the cliff or vertical rock exposure which is commonly found in mountainous regions. It is particularly available in abundance in the northern parts of England and Scotland. In rock-climbing parlance, a crag is a climber's term for a cliff or a group of cliffs, which they attempt to climb during their trekking and hiking expeditions. Crag and tail is a geological formation caused by the passage of a glacier or a mass of ice over an area of hard rock.