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Munro Drive
Munro Drive is a suburban pass through the Linksfield Ridge on the Witwatersrand range in Johannesburg, South Africa. It connects the suburbs of Upper and Lower Houghton. The drive is about 900m long and rises around 43m to the summit. History The pass is named after John Munro, director of Johannesburg Consolidated Investment Company (JCI). JCI owned the land called the Houghton Estate. It was completed in 1918. The pass was cut through quartz Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical form ... rock allowing access to the newer northern suburbs. It has a u-shape bend and a stone retaining wall, rebuilt in 1938 and made from the local quartz. A viewing site sits close to the top of the pass and looks over the northern suburbs. External links Munro Drive - YouTube References {{ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Witwatersrand
The Witwatersrand () (locally the Rand or, less commonly, the Reef) is a , north-facing scarp in South Africa. It consists of a hard, erosion-resistant quartzite metamorphic rock, over which several north-flowing rivers form waterfalls, which account for the name Witwatersrand, meaning "white water ridge" in Afrikaans.Truswell, J.F. (1977). ''The Geological Evolution of South Africa''. pp. 21, 27–28, 33–36. Cape Town: Purnell. This east-west-running scarp can be traced with only one short gap, from Bedfordview (about west of O.R. Tambo International Airport) in the east, through Johannesburg and Roodepoort, to Krugersdorp in the west (see the diagram at left below).Norman, N.; Whitfield, G. (2006) ''Geological Journeys''. pp. 38–49, 60–61. Cape Town: Struik Publishers. The scarp forms the northern edge of a plateau (or ridge) which rises about above the surrounding plains of the Highveld. A number of picturesque Johannesburg suburbs, including Observatory, Linksfi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Pass
A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both Human migration, human and animal migration throughout history. At lower elevations it may be called a hill pass. A mountain pass is typically formed between two volcanic peaks or created by erosion from water or wind. Overview Mountain passes make use of a gap (landform), gap, saddle (landform), saddle, col or notch (landform), notch. A topographic saddle is analogous to the mathematical concept of a saddle surface, with a saddle point marking the highest point between two valleys and the lowest point along a ridge. On a topographic map, passes are characterized by contour lines with an hourglass shape, which indicates a low spot between two higher points. In the high mountains, a difference of between the summit and the mountain is defined as a mountain pas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannesburg
Johannesburg ( , , ; Zulu and xh, eGoli ), colloquially known as Jozi, Joburg, or "The City of Gold", is the largest city in South Africa, classified as a megacity, and is one of the 100 largest urban areas in the world. According to Demographia, the Johannesburg–Pretoria urban area (combined because of strong transport links that make commuting feasible) is the 26th-largest in the world in terms of population, with 14,167,000 inhabitants. It is the provincial capital and largest city of Gauteng, which is the wealthiest province in South Africa. Johannesburg is the seat of the Constitutional Court, the highest court in South Africa. Most of the major South African companies and banks have their head offices in Johannesburg. The city is located in the mineral-rich Witwatersrand range of hills and is the centre of large-scale gold and diamond trade. The city was established in 1886 following the discovery of gold on what had been a farm. Due to the extremely large gold de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over 60 million people, the country is the world's 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and legislative branches of government based in Pretoria, Bloemfontein, and Cape Town respectively. The largest city is Johannesburg. About 80% of the population are Black South Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Houghton Estate
Houghton Estate, often simply called Houghton is an affluent suburb of Johannesburg, South Africa, north-east of the city centre. It is best known for being the home of Nelson Mandela. History Houghton was developed as a residential area around the turn of the 20th century, primarily by Johannesburg Consolidated Investment Company ( JCI). The suburb was laid out by surveyor Gustav Arthur Troye. Geography Communities Houghton Estate has traditionally been informally divided into two areas: ''Upper Houghton'', and ''Lower Houghton''. Upper Houghton is the southern and south-eastern portion located on a ridge, while the northern Lower Houghton is flatter, and has a grid street pattern, with parts on both sides of the M1 freeway. Upper Houghton has been declared a National Heritage Area. Upper and Lower Houghton are separated by the East-West section of Houghton Drive and part of Louis Botha Avenue. Small sections of Upper Houghton lie east of Louis Botha Avenue (bordering Observa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JCI Limited
JCI or Johannesburg Consolidated Investment Co. Ltd. was founded in 1889 by the British entrepreneur Barney Barnato. JCI was a major force in South African mining for over 100 years. Using his investments in the Kimberley diamond fields, particularly his 25% share in De Beers, Barnato foresaw the value of and invested in the potential of the Witwatersrand gold mines. At first he bought small but rich mines near Germiston – the New Primrose, named after his daughter, and others in the same region. In 1913 JCI bought the Randfontein Estates Gold Mining Company, which was a fabulously rich mine, from Sir J.B. Robinson. At the peak of its production Randfontein was equipped with 600 stamp mills, the roar of which could be heard in Johannesburg. Randfontein Estates was an extraordinarily rich mining property, and in the 1950s was a pioneer of uranium production. During the 1930s Randfontein was the largest gold producer in South Africa, if not the world. JCI was also involved with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classified as gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. Quartz is the mineral defining the val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
