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.
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.
For cutting solid cylindrical soil sample.
Steel tube with cutting edges at lower end.
An engraved index line ensures consistent volume of sample with tommy bar, size 500 x 50 mm
For withdrawing soil samples of consistent volume from a deep, continuous core.
Cadmium plated sample cylinder with serrated cutting edge with wooden handle.
For geological specimen extraction.
Set of six in plastic wallet comprising one each flat cold chisel 100 x 6 mm 130 x 9.5 mm 150 x 13 mm 180 x 16 mm 180 x 19 mm and one crosscut cold chisel 150 x 13 mm.
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
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