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Poiana Ruscă Mountains
The Poiana Ruscă Mountains (part of the Western Carpathians) are a Carpathian mountain range in western Romania. The mountains are situated roughly south of the Mureș River, northeast of the Timiș River, and west of the Strei River. The Bega River emerges from these mountains. The nearest large towns are Lugoj, Hunedoara, and Caransebeș. The Poiana Ruscă Mountains cover an area of about , having mean altitudes from . The highest summit is the , at . Mining The mountains contain resources such as magnetite, iron, thorium and lead, and as such are the site of many mines. In the nineteenth century, the mountains were also centers of gold, silver, and salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantitie ... mining and production. However, after 1990 some mines were closed and oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorium
Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided. All known thorium isotopes are unstable. The most stable isotope, 232Th, has a half-life of 14.05 billion years, or about the age of the universe; it decays very slowly via alpha decay, starting a decay chain named the thorium series that ends at stable 208 Pb. On Earth, thorium and uranium are the only significantly radioactive elements that still occur naturally in large quantities as primordial elements. Thorium is estimated to be over three times as abundant as uranium in the Earth's crust, and is chiefly refined from monazite sands as a by-product of extracti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Ranges Of Romania
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Țara Hațegului
Țara Hațegului ("Hațeg Land"; german: Wallenthal, hu, Hátszegvidék, la, terra Harszoc) is a historical and ethnographical area in Hunedoara County, Romania, in the south-western corner of Transylvania. It is centered in the town of Hațeg. Țara Hațegului is located in the Depression of Hațeg. Here there are: the site of Ulpia Traiana Sarmizegetusa (the capital of the Roman Dacia, established in the 2nd century A.D.), the Densuș Church and palaeontological remains (see Hațeg Island and Hatzegopteryx). Under the Kingdom of Hungary, the Hátszeg District was part of Hunyad County. The region is composed of one town and ten communes: Hațeg, Baru, Densuș, General Berthelot, Pui, Răchitova, Râu de Mori, Sarmizegetusa, Sălașu de Sus, Sântămăria-Orlea and Totești Totești ( hu, Totesd) is a Commune in Romania, commune in Hunedoara County, Transylvania, Romania. It is composed of five villages: Cârnești, Copaci, Păclișa (''Poklisa''), Reea (''Rea'') and Toteș ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orăștie Groove
Orăștie (; german: link=no, Broos, hu, Szászváros, la, Saxopolis) is a city in Hunedoara County, south-western Transylvania, central Romania. History 7th–9th century – On the site of an old swamp was a human settlement, now the location of the old town center, whose remains can be traced into the 10th century when the first fortification was built with raised earth and wood stockades. 11th–12th century – The first Christian religious edifice was raised: The Orăștie Rotunda. It is a circular chapel, with an age estimated at 1000 years. Perhaps it was used only by aristocratic families that dominated the Orăștie area and surroundings in the 11th century. Nearby there is a similar construction from the same period – The Geoagiu Rotunda. 1105 – In the wake of the First Crusade Anselm von Braz ”liber de liberis genitus", châtelain of Logne, Walloon ministerial count settled here. The historian Karl Kurt Klein implies – thoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lipova Plateau
Lipova or Lipová may refer to places: Czech Republic *Lipová (Cheb District), a municipality and village in the Karlovy Vary Region * Lipová (Děčín District), a municipality and village in the Ústí nad Labem Region * Lipová (Přerov District), a municipality and village in the Olomouc Region * Lipová (Prostějov District), a municipality and village in the Olomouc Region * Lipová (Zlín District), a municipality and village in the Zlín Region *Lipová-lázně, a municipality and village in the Olomouc Region **Horní Lipová, a village in the municipality *Lipová, a village and part of Chuderov in the Ústí nad Labem Region *Lipová, a village and part of Volfířov in the South Bohemian Region Romania *Lipova, Arad, a town in Arad County *Lipova, Bacău, a commune in Bacău County * Lipova (river), a river Slovakia * Lipová, Nitra Region, a municipality and village in the Nitra Region * Lipová, Prešov Region, a municipality and village in the Prešov Region S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt
Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantities in seawater. The open ocean has about of solids per liter of sea water, a salinity of 3.5%. Salt is essential for life in general, and saltiness is one of the basic human tastes. Salt is one of the oldest and most ubiquitous food seasonings, and is known to uniformly improve the taste perception of food, including otherwise unpalatable food. Salting, brining, and pickling are also ancient and important methods of food preservation. Some of the earliest evidence of salt processing dates to around 6,000 BC, when people living in the area of present-day Romania boiled spring water to extract salts; a salt-works in China dates to approximately the same period. Salt was also prized by the ancient Hebrews, Greeks, Romans, Byzantines, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
