River in Action

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

Set of 2 landform models, each includes an overlay representing ancient mountain forms that can be removed and compared with the base model to show changes millions of years later. Cross section shows basic mountain types, volcanic fault block, glaciated domes and folded mountains with lesson plan, size 45 x 60 cm.

Description

Showing factors that cause pollution both in air and in water.

Description

Showing sea floor spreading with formation of crust, subduction zones, continents and mid-ocean ridges