Changes

: '''Contour mining''' is conducted on hillsides where [[layers]] of the desired material are accessible. The [[overburden]] (material on top) is removed and the wanted material mined, then the overburden material is replaced.  

: '''Contour mining''' is conducted on hillsides where [[layers]] of the desired material are accessible. The [[overburden]] (material on top) is removed and the wanted material mined, then the overburden material is replaced.  

: '''Open pit''' mining is simply the excavation of the overburden, and removal of the wanted material. The result is a large open pit.  

: '''Open pit''' mining is simply the excavation of the overburden, and removal of the wanted material. The result is a large open pit. In some parts of the world, including the [[United Kingdom]], this method is known as '''open cast''' mining.

In recent times the mining companies are required to replace excess materials and replant vegetation so little trace of the mining remains.   

In recent times the mining companies are required to replace excess materials and replant vegetation so little trace of the mining remains.