The
Magaliesberg is a very old mountain range. Two and a half to two
billion years old. About half the age of the Earth itself. One
hundred times older than Mount Everest and seventeen times older than
Table Mountain!
What
happened is that a large piece of the Earth’s crust, 140 km long
broke loose and tilted toward the North. In this picture taken from
the top of Voortrekker Monument one can see the oldest tilt in the
foreground, the green little hills across the motorway. The second
tilt lies just behind the Pretoria city bowl, these are the Daspoort
Rand and Meintjieskop on which the Union Building are built. The
distant range at the back are the Magaliesberg Mountains that lie
beyond the Moot (the Moat) area separating Pretoria from the Pretoria
North area.
This
picture from Wikipedia shows the Magaliesberg tilt very well.
The
northern part of the tilt plunged deep into the Earth’s mantel and
magna filled a lake 140 km long and about 100 km wide. The tick layer
of molten magna was at about 1,600 degrees and cooled down slowly.
Different minerals solidify at different temperatures. As a result
the platinum group of metals solidified in a reef, the Merensky Reef
at what is now about 500m below the surface. Behind the Magalies lies
80 percent of the World’s known platinum resources, of which 60
percent of the World production is mined. With the platinum lies 70
percent of the World’s know chrome resources, fro which 50 percent
of the World’s production comes. This is smelted in large chrome
smelters to produce stainless steel for export to mainly Germany,
China and Japan.
With
this lies 95 percent of the World’s known vanadium, that is use in
the hardening of aluminium fuselages’ in modern aircraft and
spacecraft!
Truly,
the Magalies produces South Africa’s new gold!
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