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Sewa River
Sewa River is a river in Sierra Leone. Its furthest sources are the Bagbe River and Bafi River, which originates in the mountainous areas of the northeastern part of the country, near the border with Guinea. From the confluence of Bagbe and Bafi in the Kono District Sewa flows in a south-southwestern direction and drains an area of . Close to the Atlantic coast the river joins Waanje River to form the Kittam River. Kittam River flows westwards along the coast and enters a network of lagoons and streams separated from the sea by Turner's Peninsula. By the island of Sherbro, Kittam empties into the larger estuary Sherbro River. Sewa River is navigable over shorter distances, but in the middle and upper reaches, rapids and cataracts dominate. The river has great commercial value for Sierra Leone. Sewa's upper reaches is being panned for diamonds on a large scale. Closer to the coast rice cultivation and the cultivation of piassava, exported for the production of besom A besom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Leone
Sierra Leone,)]. officially the Republic of Sierra Leone, is a country on the southwest coast of West Africa. It is bordered by Liberia to the southeast and Guinea surrounds the northern half of the nation. Covering a total area of , Sierra Leone has a tropical climate, with diverse environments ranging from savanna to rainforests. The country has a population of 7,092,113 as of the 2015 census. The capital and largest city is Freetown. The country is divided into five administrative regions, which are subdivided into Districts of Sierra Leone, 16 districts. Sierra Leone is a constitutional republic with a unicameral parliament and a directly elected executive president, president serving a five-year term with a maximum of two terms. The current president is Julius Maada Bio. Sierra Leone is a Secular state, secular nation with Constitution of Sierra Leone, the constitution providing for the separation of state and religion and freedom of conscience (which includes freedom of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinea
Guinea ( ),, fuf, 𞤘𞤭𞤲𞤫, italic=no, Gine, wo, Gine, nqo, ߖߌ߬ߣߍ߫, bm, Gine officially the Republic of Guinea (french: République de Guinée), is a coastal country in West Africa. It borders the Atlantic Ocean to the west, Guinea-Bissau to the northwest, Senegal to the north, Mali to the northeast, Cote d'Ivoire to the southeast, and Sierra Leone and Liberia to the south. It is sometimes referred to as Guinea-Conakry after its capital Conakry, to distinguish it from other territories in the eponymous region such as Guinea-Bissau and Equatorial Guinea. It has a population of million and an area of . Formerly French Guinea, it achieved independence in 1958. It has a history of military coups d'état.Nicholas Bariyo & Benoit FauconMilitary Faction Stages Coup in Mineral-Rich Guinea ''Wall Street Journal'' (September 5, 2021).Krista LarsonEXPLAINER: Why is history repeating itself in Guinea's coup? Associated Press (September 7, 2021).Danielle PaquettH ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piassava
Piassava, also piaçava (), piaçaba (), piasaba, pissaba, piassaba, and piaçá (),The piaçá form occurs mostly in Portugal and is considered less correct by some dictionaries. is a fibrous product of Brazilian palm species '' Attalea funifera'' and ''Leopoldinia piassaba''. It is often used in making brooms and for other purposes. Piassava was historically exported to Europe before the widespread use of synthetic materials such as plastic. Today, it is mostly used locally in South America. See also * West African piassava palm References * Exploration of the Valley of the Amazon Vol. I by Lieutenant William Lewis Herndon (1853) chapter 14, p. 285 * ''Webster's Revised Unabridged Dictionary ''Webster's Dictionary'' is any of the English language dictionaries edited in the early 19th century by American lexicographer Noah Webster (1758–1843), as well as numerous related or unrelated dictionaries that have adopted the Webster's ...'' (1913) Plant common names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rice
Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima ''Oryza glaberrima'', commonly known as African rice, is one of the two domesticated rice species. It was first domesticated and grown in West Africa around 3,000 years ago. In agriculture, it has largely been replaced by higher-yielding Asian r ...'' (African rice). The name wild rice is usually used for species of the genera ''Zizania (genus), Zizania'' and ''Porteresia'', both wild and domesticated, although the term may also be used for primitive or uncultivated varieties of ''Oryza''. As a cereal, cereal grain, domesticated rice is the most widely consumed staple food for over half of the world's World population, human population,Abstract, "Rice feeds more than half the world's population." especially in Asia and Africa. It is the agricultural commodity with the third-highest worldwide production, after sugarcane and maize. Since sizable portions of sugarcane and ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond
Diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the Chemical stability, chemically stable form of carbon at Standard conditions for temperature and pressure, room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest Scratch hardness, hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of lattice defect, defects or impurities (about one per million of lattice atoms) color diamond blue (bor ... [...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] |
Rapids
Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence. Rapids are hydrological features between a ''run'' (a smoothly flowing part of a stream) and a ''cascade''. Rapids are characterized by the river becoming shallower with some rocks exposed above the flow surface. As flowing water splashes over and around the rocks, air bubbles become mixed in with it and portions of the surface acquire a white color, forming what is called "whitewater". Rapids occur where the bed material is highly resistant to the erosive power of the stream in comparison with the bed downstream of the rapids. Very young streams flowing across solid rock may be rapids for much of their length. Rapids cause water aeration of the stream or river, resulting in better water quality. Rapids are categorized in classes, generally running from I to VI. A Class 5 rapid may be categorized as Class 5.1-5.9. While Class I rapids are eas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sherbro River
Sherbro Island is in the Atlantic Ocean, and is included within Bonthe District, Southern Province, Sierra Leone. The island is separated from the African mainland by the Sherbro River in the north and Sherbro Strait in the east. It is long and up to wide, covering an area of approximately . The western extremity is Cape St. Ann. Bonthe, on the eastern end, is the chief port and commercial centre. Historically, this was part of the territory of the historic Sherbro people, who dominated a large area of what is now Sierra Leone. Today they are concentrated in the southern and central part of Moyamba District. They make up by far the largest ethnic group in the island, where the total population is 28,457. The island has more than of tropical beaches. It has been earmarked by the Ministry for Tourism and Development of Sierra Leone for tourism development. Economic activities Swamp-rice cultivation, tourism, and fishing are the main economic activities. History Sherbro Isl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone. Estuaries are subject both to marine influences such as tides, waves, and the influx of saline water, and to fluvial influences such as flows of freshwater and sediment. The mixing of seawater and freshwater provides high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphological features or to water-circulation patterns. They can have many different names, such as bays, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sherbro Island
Sherbro Island is in the Atlantic Ocean, and is included within Bonthe District, Southern Province, Sierra Leone. The island is separated from the African mainland by the Sherbro River in the north and Sherbro Strait in the east. It is long and up to wide, covering an area of approximately . The western extremity is Cape St. Ann. Bonthe, on the eastern end, is the chief port and commercial centre. Historically, this was part of the territory of the historic Sherbro people, who dominated a large area of what is now Sierra Leone. Today they are concentrated in the southern and central part of Moyamba District. They make up by far the largest ethnic group in the island, where the total population is 28,457. The island has more than of tropical beaches. It has been earmarked by the Ministry for Tourism and Development of Sierra Leone for tourism development. Economic activities Swamp-rice cultivation, tourism, and fishing are the main economic activities. History Sherbro Isl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turner's Peninsula
Turner's Peninsula is a 110 km-long peninsula in southern Sierra Leone, running westwards, parallel to the coast, bounded by the Atlantic Ocean. The peninsula was occupied by the British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies. ** Britishness, the British identity and common culture * British English, ... from 1825 and is inhabited along all of its length. References *Peter Tucker ''The Mission Boy from Shebar'' AuthorHouse, Jul 29, 2011 pg. 1 Peninsulas of Sierra Leone {{SierraLeone-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe and Asia from the "New World" of the Americas in the European perception of the World. The Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Europe and Africa to the east, and North and South America to the west. As one component of the interconnected World Ocean, it is connected in the north to the Arctic Ocean, to the Pacific Ocean in the southwest, the Indian Ocean in the southeast, and the Southern Ocean in the south (other definitions describe the Atlantic as extending southward to Antarctica). The Atlantic Ocean is divided in two parts, by the Equatorial Counter Current, with the North(ern) Atlantic Ocean and the South(ern) Atlantic Ocean split at about 8°N. Scientific explorations of the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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