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Geelwal Karoo mineral sand deposit, on the west coast of South Africa. Tectonic activity, which results in coastlines rising from the ocean, may also cause a beach system to become stranded above the high-water mark and lock in the heavy mineral sands. Similarly, a beach system that is drowned by the subsidence of a coastline may be preserved ...
Civic Centre, Victoria Island. Victoria Island (VI) is an affluent area that encompasses a former island of the same name neighbouring Lagos Island, Ikoyi and the Lekki Peninsula by the Lagos Lagoon. It is the main business and financial centre of Lagos State, Nigeria. Victoria Island is one of the most exclusive and expensive areas to reside ...
Victoria Nyanza. The black line indicates Stanley's route. Lake Victoria is one of the African Great Lakes.With a surface area of approximately 59,947 km 2 (23,146 sq mi), [6] [7] [page needed] Lake Victoria is Africa's largest lake by area, the world's largest tropical lake, [8] and the world's second-largest fresh water lake by surface area after Lake Superior in North America. [9]
The locations of important towns and cities in the region are indicate in the appropriate places. The red line in the detail of the Johannesburg region shows the location of the scarp/ridge that gave the "Witwatersrand" its name; the purple line the location where the main gold bearing reef is exposed at the surface, just south of Johannesburg.
The sand, silt and mud deposits were lithified by pressure and then folded during the Cape Orogeny to form the Cape Fold Belt, which extends along the western and southern coasts. [ 1 ] The basal Graafwater Formation (300-450m thick) consists of interlayered pale brown sandstone, laminated pink siltstone and dark maroon coloured shale .
A feasibility study of the Skorpion zinc project has confirmed that Skorpion could rank as one of the worldʼs largest integrated zinc mining and refining operations. Haib, at the border with South Africa, is a classic porphyry copper-gold-molybdenum deposit featuring oxide and sulphide copper with a predominance of chalcopyrite in the sulphide ...
The central highland, or peak, of the crater is surrounded by a small sand-filled trough; this, in turn, is surrounded by a larger circular trough. Linear rock ridges alternating with light orange sand deposits cross the image from upper left to lower right; these are called yardangs by geomorphologists. Yardangs form by wind erosion of exposed ...
Liberia has some of the largest iron ore reserves in Africa, with iron content of 30% to 67%, in banded iron formations from the Precambrian. The high grade ores, with more than 60% are primarily hematite, while lower grade ores with 30 to 40% iron are generally magnetite. Liberia also has medium-grade deposits of mixed hematite and magnetite.