Soil Auger, Helical

Description

Showing upper level of an underground surface in which soil or rock is permanently saturated with water. The water table separates the underground water zone from the capillary fringe or zone of aeration.

Description

Showing ideal features of landscape to teach the formation of particular geographical terms.

Description

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

Description

Shows coastal and mountain terrain in natural colour relief & cross section diagram of the substance of a typical volcano. Complete with lesson plan, size 60 x 45 cm