limestone quarrying in the yorkshire dales
In the Yorkshire Dales this limestone exposure has led to the formation of large cave systems and watercourses, known as quot;gillsquot; and quot;potsquot;. These potholes are more prevalent on the eastern side and are amongst the largest in England; notable examples are the chasms of Gaping Gill, which is over 350 ft (107 m) deep and Rowten Pot,