Witpoortjie Falls in the Walter Sisulu National Botanical Garden, formerly the Witwatersrand National Botanical Gardens. Waterfalls like this, cascading over a 56-kilometre-long (35 mi) quartzite ridge in Gauteng gave rise to the name “Witwatersrand”, which means “white water ridge” in Afrikaans.

Carbon Leader Gold Ore, Blyvooruitzicht Gold Mine, Carletonville Goldfield, West Witwatersrand. The Carbon Leader is a blackened, hydrocarbon-rich stromatolitic interval richly impregnated with native gold and uraninite. This is a paleoplacer deposit, part of an ancient alluvial fan succession.

High-grade gold ore from the Witwatersrand near Johannesburg.

An ashtray carved out of a soft form of banded ironstone. Note the alternating red and beige layers that make up this rock. The red layers much richer in iron (III) oxides (Fe 2O 3) were laid down during time periods when Archean photosynthesizing cyanobacteria produced oxygen that rapidly reacted with the dissolved iron (II) (Fe2+ ) in water, to form insoluble iron oxide (hematite). The beige layers are sediments that settled during time periods when there was no (or much less) precipitation of iron oxide due to the depletion of dissolved oxygen or

O.R. Tambo International Airport in Gauteng, South Africa

A now removed O.R Tambo bust at the aircraft viewing deck above the CTB.

Inside the O. R. Tambo International Airport.

OR Tambo terminal buildings