Rocks And Volcanoes

Description

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

Description

Shows mining when any ore body lies at a considerable distance below the surface. The specific mining method selected depends upon the size, shape and orientation of the ore body and the depth involved.

Description

Showing the Earth revolving around the Sun and the Moon around Earth. With a candle to represent Sun, manually operated.