South Africa |
South Africa has a mean altitude of about 1,200 m (3,900 ft), and at least 40% of the surface is at a higher elevation. Parts of Johannesburg are more than 1,800 m (6,000 ft) above sea are three major zones: the marginal regions, which range in width from 80 to 240 km (50 – 150 mi) in the east to 60 – 80 km (35 – 50 mi) in the west, and including the eastern plateau slopes ...
