Minerals Collection,Set Of 15

Description

Open pit mining often results in a large hole or pit being formed in the process of extracting a mineral. Deposits mined by open pit techniques are generally divided into horizontal layers called benches. The thickness of the benches depends on the type of deposit & the mineral being mined. Mining is generally conducted on a number of levels at any one time.

Description

Shows the geological cycle and process of ever changing contents of the Earth which results in formation of rocks.

Description

Showing about 60 signs in actual relief