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Birim River
The Birim River is one of the main tributaries of the Pra River in Ghana and the country's most important diamond-producing area, flowing through most of the width of the Eastern region. The river rises in the east of the Atewa Range, flows north through the gap between this range and the Kwahu Plateau, then runs roughly south-west until it joins the Pra. It gives its name to the Birimian rock formation, which yields most of the gold in the region. Ghana is the second largest producer of gold in Africa. Geology The Birim River basin lies in the Man Shield area of the West African craton, which has been overlaid by Early Proterozoic metasedimentary Birimian rocks. These rocks appear to have originated in mid-oceanic arcs of volcanoes, which formed a crust that collided with and rode over the Man shield portion of the West African Craton and was compressed to form a series of folds generally trending northeasterly. The Birimian rocks include Akwatian formations, named after the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pra River
Pra River may refer to: *Pra River (Ghana) The Pra River is a river in Ghana, the easternmost and the largest of the three principal rivers that drain the area south of the Volta divide. Rising in the Kwahu Plateau near Mpraeso and flowing southward for 240 km through rich cocoa an ... * Pra (Russia), a tributary of the Oka {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kibi, Ghana
Kibi or ''Kyebi'' is a town and the capital of the East Akim Municipal District, a district in the Eastern Region of south Ghana, on the eastern slopes of the Atewa Range. Kibi lies at an altitude of 318 m, and, Kibi has a 2013 settlement population of 11,677 people. Transport Train Kibi is served at a short distance by a station on the Ghana rail transport network. History Kibi is the traditional capital of the Akyem Abuakwa state in Eastern region (also known as Okyeman). The Ofori Panin paramount stool which is the traditional seat of the Okyenhene is located in Kibi. Education Kibi has a number of educational institutions from primary education to higher education and Kibi also has as school for the deaf, founded in 1975, which by 2008 had 213 students. Economy Tarkwaian rocks, a major source of gold, have been found near Kibi. Several mining companies including Paramount Mining Corporation have been exploring their potential. RUSAL, a major Russian Aluminiu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamproite
Lamproite is an ultrapotassic mantle-derived volcanic or subvolcanic rock. It has low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in incompatible elements. Lamproites are geographically widespread yet are volumetrically insignificant. Unlike kimberlites, which are found exclusively in Archaean cratons, lamproites are found in terrains of varying age, ranging from Archaean in Western Australia, to Palaeozoic and Mesozoic in southern Spain. They also vary widely in age, from Proterozoic to Pleistocene, the youngest known example from Gaussberg in Antarctica being 56,000 ± 5,000 years old. Lamproite volcanology is varied, with both diatreme styles and cinder cone or cone edifices known. Petrology Lamproites form from partially melted mantle at depths exceeding 150 km. The molten material is forced to the surface in volcanic pipes, bringing with it xenoliths and diamonds from the harzburgitic peridotite or eclogite mantle regi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RELX
RELX plc (pronounced "Rel-ex") is a British multinational information and analytics company headquartered in London, England. Its businesses provide scientific, technical and medical information and analytics; legal information and analytics; decision-making tools; and organise exhibitions. It operates in 40 countries and serves customers in over 180 nations. It was previously known as Reed Elsevier, and came into being in 1993 as a result of the merger of Reed International, a British trade book and magazine publisher, and Elsevier, a Netherlands-based scientific publisher. The company is publicly listed, with shares traded on the London Stock Exchange, Amsterdam Stock Exchange and New York Stock Exchange (ticker symbols: London: REL, Amsterdam: REN, New York: RELX). The company is one of the constituents of the FTSE 100 Index, Financial Times Global 500 and Euronext 100 Index. History The company, which was previously known as Reed Elsevier, came into being in 1993, as a r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manitowoc Company
The Manitowoc Company, Inc. was founded in 1902 and, through its wholly owned subsidiaries, designs, manufactures, markets, and supports mobile telescopic cranes, tower cranes, lattice-boom crawler cranes, and boom trucks under the Grove, Manitowoc, National Crane, Potain, Shuttlelift and Manitowoc Crane Care brand names. History Manitowoc Company, Inc. was founded by Charles West (business), Charles West and Elias Gunnell in the Lake Michigan, lakeshore community of Manitowoc, Wisconsin, in 1902. It was known as a shipbuilding and ship-repair company under the name Manitowoc Shipbuilding Company. The company grew and diversified, entering the lattice-boom crane business in the mid-1920s and branching into commercial refrigeration equipment shortly after World War II. During World War II, the United States Department of the Navy, Department of the Navy contracted Manitowoc to build a total of 28 submarines, plus the canceled USS Chicolar (SS-464), USS ''Chicolar'' (SS-464). Befor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of The Army
The United States Department of the Army (DA) is one of the three military departments within the United States Department of Defense, Department of Defense of the U.S. The Department of the Army is the Federal government of the United States, federal government agency within which the United States Army (U.S.) is organized, and it is led by the United States Secretary of the Army, secretary of the Army, who has statutory authority under 10 United States Code § 7013 to conduct its affairs and to prescribe regulations for its government, subject to the limits of the law, and the directions of the United States Secretary of Defense, secretary of defense and the President of the United States, president. The secretary of the army is a civilian official appointed by the president and confirmed by the United States Senate, Senate. The highest-ranking military officer in the department is the Chief of Staff of the United States Army, chief of staff of the Army, who is also a member ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British People
British people or Britons, also known colloquially as Brits, are the citizens of the United Kingdom of Great Britain and Northern Ireland, the British Overseas Territories, and the Crown dependencies.: British nationality law governs modern British citizenship and nationality, which can be acquired, for instance, by descent from British nationals. When used in a historical context, "British" or "Britons" can refer to the Ancient Britons, the indigenous inhabitants of Great Britain and Brittany, whose surviving members are the modern Welsh people, Cornish people, and Bretons. It also refers to citizens of the former British Empire, who settled in the country prior to 1973, and hold neither UK citizenship nor nationality. Though early assertions of being British date from the Late Middle Ages, the Union of the Crowns in 1603 and the creation of the Kingdom of Great Britain in 1707 triggered a sense of British national identity.. The notion of Britishness and a shared Brit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of African History
''The Journal of African History'' (JAH) is a triannual peer-reviewed academic journal. It was established in 1960 and is published by Cambridge University Press. It was among the first specialist journals to be devoted to African history and archaeology and was founded by John Fage and Roland Oliver. As stated on the journal's website: The current editors are Professor Shane Doyle University of Leeds, UK', Professor Dan Magaziner Yale University, USA', Professor Marissa Moorman Indiana University Bloomington, USA', and Professor Moses Ochonu Vanderbilt University, USA'. Abstracting and indexing The journal is abstracted and indexed in: According to the official website, the journal has a 2015 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 0.857. Referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placer Mining
Placer mining () is the mining of stream bed (Alluvium, alluvial) deposits for minerals. This may be done by open-pit mining, open-pit (also called open-cast mining) or by various surface excavating equipment or tunneling equipment. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in Alluvium, alluvial deposits—deposits of sand and gravel in modern or ancient stream beds, or occasionally glacial deposits. The metal or gemstones, having been moved by stream flow from an original source such as a vein, are typically only a minuscule portion of the total deposit. Since gems and heavy metals like gold are considerably denser than sand, they tend to accumulate at the base of placer deposits. Placer deposits can be as young as a few years old, such as the Canadian Queen Charlotte beach gold placer deposits, or billions of years old like the Elliot Lake uranium paleoplacer within the Huronian Supergroup i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Coast (region)
The Gold Coast was the name for a region on the Gulf of Guinea in West Africa that was rich in gold, petroleum, sweet crude oil and natural gas. This former region is now known as the country Ghana. Etymology and position The Gold Coast, Slave Coast, Pepper Coast (or Grain Coast) and Ivory Coast were named after the main export resources found there, respectively. Early uses of the term ''Gold Coast'' refer strictly to the coast and not the interior. It was not until the 19th century that the term came to refer to areas that are far from the coast. The Gold Coast was to the east of the Ivory Coast and to the west of the Slave Coast. Territorial entities Gold Coast region territorial entities were: * Portuguese Gold Coast (Portuguese, 1482–1642) * Dutch Gold Coast (Dutch, 1598–1872) * Swedish Gold Coast (Swedes, 1650–1658; 1660–1663) * Couronian Gold Coast (Duchy of Courland and Semigallia, 1651–1661) * Danish Gold Coast ( Denmark-Norway, 1658–1850) * Bran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
