After extensive mining in the last hundred years, the landscapes has developed a unique and in some parts, a bizarre appearance.

With extensive underground mining for many years, this area has been facing the problem of land subsidence.

The anticipated "emergency" undoubtedly referred to extensive mining of American waters.

There was extensive mining in the area in late 1800s through the 1930s.

This area saw the most extensive mining in the park, and trails lead past old mines and ghost towns.

Its areas saw extensive mining in the past.

Although not rare, fossils can only be found through extensive mining of slate.

The land has undergone extensive open-cast mining and subsequent restoration.

The extensive mining and nickel processing has large impact on the local environment.

Deposits of red clay increased between 1955 and 1968 due to extensive mining in the area.