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Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...
Granite. Granite (/ ˈɡrænɪt / GRAN-it) is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.
Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...
South Africa accepted the convention on 10 July 1997. [3] There are twelve World Heritage Sites in South Africa. [3] The first three sites in South Africa were added to the list in 1999 while the most recent ones, the Nelson Mandela Legacy Sites and the Pleistocene Occupation Sites of South Africa, were added in 2024.
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa.Its nine provinces are bounded to the south by 2,798 kilometres (1,739 miles) of coastline that stretches along the South Atlantic and Indian Ocean; [14] [15] [16] to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini.
Demographics of South Africa. According to the 2022 census, the population of South Africa is about 62 million people of diverse origins, cultures, languages, and religions. [ 1 ] The South African National Census of 2022 was the most recent census held; the next will be in 2032. [ 4 ]
The percentage of all 'White' households that are made up of individuals is 19.1%. The average household size is 3.05 members. In South Africa, this population is spread out, with 19.0% under the age of 15, 15.1% from 15 to 24, 31.0% from 25 to 44, 23.8% from 45 to 64, and 11.1% who are 65 years of age or older.
South Africa is a sunny country, averaging 8–10 daily sunshine hours in most regions. [2] The average annual rainfall for South Africa is about 464 mm (compared to a global average of 786 mm [3]) but large and unpredictable variations are common. Overall, rainfall is greatest in the east and gradually decreases westward, with some semi-desert ...
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