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Araçuaí River
The Araçuaí River ( pt, Rio Araçuaí, links=no) is a river of Minas Gerais state in southeastern Brazil. The Araçuaí River flows through the Jequitinhonha Valley in the northeast of Minas Gerais, through the town of Araçuaí, which the river takes its name from. It is a tributary of the Jequitinhonha River, flowing south from its right bank. The confluence of the river is located at . Tributaries include the Gravatá River (Minas Gerais), Gravatá River, Setúbal River, Capivara River (Araçuaí River), Capivara River, Fanado River and the Itamarandiba River. River valley According to the Fundação João Pinheiro (FJP) (João Pinheiro Foundation), an agency of the government of the state of Minas Gerais, which has the responsibility to provide technical support services to the State Secretariat for Planning and Management and other state operational systems, the Araçuaí River raises in the Senador Modestino Gonçalves district and joins the Jequitinhonha River in the Araçu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minas Gerais
Minas Gerais () is a state in Southeastern Brazil. It ranks as the second most populous, the third by gross domestic product (GDP), and the fourth largest by area in the country. The state's capital and largest city, Belo Horizonte (literally "Beautiful Horizon"), is a major urban and finance center in Latin America, and the sixth largest municipality in Brazil, after the cities of São Paulo, Rio de Janeiro, Salvador, Brasília and Fortaleza, but its metropolitan area is the third largest in Brazil with just over 5.8 million inhabitants, after those of São Paulo and Rio de Janeiro. Nine Brazilian presidents were born in Minas Gerais, the most of any state. The state has 10.1% of the Brazilian population and is responsible for 8.7% of the Brazilian GDP. With an area of —larger than Metropolitan France—it is the fourth most extensive state in Brazil. The main producer of coffee and milk in the country, Minas Gerais is known for its heritage of architecture and colonia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquamarine (gemstone)
Aquamarine is a pale-blue to light-green variety of beryl. The color of aquamarine can be changed by heat. Aquamarine has a chemical composition of Be3Al2Si6O18, also containing Fe2+. It has a hardness of 7.5 to 8. Aquamarine contains no or few noticeable inclusions but it can have inclusions like mica, hematite, or salt-water. Aquamarine is a common gemstone. However, there is a rarer deep blue variant called maxixe, but its color can fade due to sunlight. The color of maxixe is caused by NO3. Dark-blue maxixe color can be produced in green, pink or yellow beryl by irradiating it with high-energy radiation (gamma rays, neutrons or even X-rays). Name and etymology The name ''aquamarine'' comes from ''aqua'' (), and ''marine'', deriving from ''marina'' (). The word ''aquamarine'' was first used in the year 1677. The word ''aquamarine'' has been used as a modifier for other minerals like aquamarine tourmaline, aquamarine emerald, aquamarine chrysolite, aquamarine sapphire, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemstone
A gemstone (also called a fine gem, jewel, precious stone, or semiprecious stone) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments. However, certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) are also used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value. Rarity and notoriety are other characteristics that lend value to gemstones. Apart from jewelry, from earliest antiquity engraved gems and hardstone carvings, such as cups, were major luxury art forms. A gem expert is a gemologist, a gem maker is called a lapidarist or gemcutter; a diamond cutter is called a diamantaire. Characteristics and classification The traditional classification in the West, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brasiliano Orogeny
Brasiliano orogeny or Brasiliano cycle ( pt, Orogênese Brasiliana and ''Ciclo Brasiliano'') refers to a series of orogenies of Neoproterozoic age exposed chiefly in Brazil but also in other parts of South America. The Brasiliano orogeny is a regional name for the larger Pan-African/Brasiliano orogeny that extended not only in South America but across most of Gondwana. In a wide sense the Brasiliano orogeny includes also the Pampean orogeny. Almeida ''et al''. coined the term Brasiliano Orogenic Cycle in 1973. The orogeny led to the closure of several oceans and aulacogens including the Adamastor Ocean, the Goianides Ocean, the Puncoviscana Ocean and the Peri-Franciscano Ocean. Attempts to correlate the South American Brasiliano belts with the African Pan-African belts on the other side of the Atlantic has in many cases been problematic. Belts and belt provinces }) , Northeast Brazil, Southeast Brazil , São Francisco Craton , , The Araçuaí Belt is the west portion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozoic
The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian reptiles, like the dinosaurs; an abundance of conifers and ferns; a hot Greenhouse and icehouse earth, greenhouse climate; and the tectonic break-up of Pangaea. The Mesozoic is the middle of the three eras since Cambrian explosion, complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest well-documented mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, Pterosaur, pterosaurs, Mosasaur, mosasaurs, and Plesiosaur, plesiosaurs. The Mesozoic was a time of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Congo
The Republic of the Congo (french: République du Congo, ln, Republíki ya Kongó), also known as Congo-Brazzaville, the Congo Republic or simply either Congo or the Congo, is a country located in the western coast of Central Africa to the west of the Congo river. It is bordered to the west by Gabon, to its northwest by Cameroon and its northeast by the Central African Republic, to the southeast by the Democratic Republic of the Congo, to its south by the Angolan exclave of Cabinda and to its southwest by the Atlantic Ocean. The region was dominated by Bantu-speaking tribes at least 3,000 years ago, who built trade links leading into the Congo River basin. Congo was formerly part of the French colony of Equatorial Africa. The Republic of the Congo was established on 28 November 1958 and gained independence from France in 1960. It was a Marxist–Leninist state from 1969 to 1992, under the name People's Republic of the Congo. The country has had multi-party elections since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orogen
An orogenic belt, or orogen, is a zone of Earth's crust affected by orogeny. An orogenic belt develops when a continental plate crumples and is Tectonic uplift, uplifted to form one or more mountain ranges; this involves a series of geological processes collectively called ''orogenesis''. Overview Orogeny typically produces ''orogenic belts'', which are elongated regions of deformation bordering continental cratons. Young orogenic belts, in which subduction is still taking place, are characterized by frequent volcanic activity and earthquakes. Older orogenic belts are typically deeply eroded to expose displaced and deformed strata. These are often highly metamorphosed and include vast bodies of intrusive igneous rock called batholiths. File:Active Margin.svg, Subduction of an oceanic plate beneath a Plate tectonics, continental plate to form an accretionary orogen. (example: the Andes) File:Continental-continental convergence Fig21contcont.gif, Continental collision of two cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taquaral
Taquaral is a municipality in the state of São Paulo in Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area .... The population is 2,819 (2015 est.) in an area of 53.9 km2. The elevation is 639 m. References Municipalities in São Paulo (state) {{SaoPauloState-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itinga
Itinga is a Brazilian municipality located in the northeast of the state of Minas Gerais. the population was 15,022 in a total area of 1,641 km². The city belongs to the mesoregion of Jequitinhonha and to the microregion of Araçuaí. The elevation of the municipal seat is 269 meters. It became a municipality in 1943. This municipality is located 33 kilometers to the west of the important BR-116 highway. It is connected by paved road. The Jequitinhonha River flows through the town. Most of the town is on the left bank of the river, but the two sides are connected by a bridge. The closest population center with a hospital and banking facilities is Araçuaí, a distance of about 47 km. The main economic activities are cattle raising and farming. The GDP was R$36,999,000 (2005). There were no banking agencies in 2006. In the rural area there were 1,403 farms with around 3,800 people involved in the agricultural sector. There were 23 tractors, a ratio of one tractor for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tourmaline
Tourmaline ( ) is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is a gemstone and can be found in a wide variety of colors. The term is derived from the Sinhalese "tōramalli", which refers to the carnelian gemstones. History Brightly colored Ceylonese gem tourmalines were brought to Europe in great quantities by the Dutch East India Company to satisfy a demand for curiosities and gems. Tourmaline was sometimes called the "Ceylonese Magnet" because it could attract and then repel hot ashes due to its pyroelectric properties. Tourmalines were used by chemists in the 19th century to polarize light by shining rays onto a cut and polished surface of the gem. Species and varieties Commonly encountered species and varieties: Schorl species: : Brownish black to black—''schorl'', Dravite species: from the Drave district of Carinthia : Dark yellow to brownish blac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novo Cruzeiro
Novo Cruzeiro is a Brazilian municipality located in the northeast of the state of Minas Gerais. Its population as of 2020 was estimated to be 31,335 people living in a total area of 1,701 km². The city belongs to the mesoregion of Jequitinhonha and to the microregion of Araçuaí. The elevation of the municipal seat is 980 meters. It became a municipality in 1943. Most of the population lives in the rural area, with over 10,000 people still engaged in agriculture, which is mainly subsistence. Novo Cruzeiro was founded by Anastácio Roque Esteves, who settled here in 1917 along the banks of the Ribeirão São Bento, a tributary of the Rio Gravatá. The first name was Fazenda Santa Maria do Ribeirão da Pedra, then Vila Gravatá, São Bento, and finally Novo Cruzeiro, the name coming from the change of the currency of the country from mil réis to the Cruzeiro. The town was once connected with the south by a railroad line, E. F. Bahia a Minas, which was extinguished in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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