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Döhlen Basin
The Döhlen Basin (german: Döhlener Becken) is a landscape unit in the German federal state of Saxony, southwest of Dresden. The Döhlen Basin has a length of 22 km and a width of 6 km and lies within the district of Sächsische Schweiz-Osterzgebirge. Description In the centre of the basin is the large county town of Freital; although the basin is named after Döhlen, one of the villages in its borough. The highest point in the area is the Lerchenberg near Possendorf at 425 m above sea level (NN); the lowest point is in the river valley of the Weißeritz at 160 m above NN. The Karsdorf fault forms the geological boundary with the Eastern Ore Mountains to the south. The formation and sedimentation of the basin lasted from Upper Carboniferous to the Lower Permian and were tectonically affected by the adjacent NW-SE trending fault zone (the Elbe Valley zone). About half of the 800-metre-thick basin filling is made of pyroclastic rock. Of economic importance were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonically
Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents known as cratons, and the ways in which the relatively rigid plates that constitute the Earth's outer shell interact with each other. Tectonics also provide a framework for understanding the earthquake and volcanic belts that directly affect much of the global population. Tectonic studies are important as guides for economic geologists searching for fossil fuels and ore deposits of metallic and nonmetallic resources. An understanding of tectonic principles is essential to geomorphologists to explain erosion patterns and other Earth surface features. Main types of tectonic regime Extensional tectonics Extensional tectonics is associated with the stretching and thinning of the crust or the lithosphere. This type of tectonics is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining In Saxony
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, and fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Germany
The geology of Germany is heavily influenced by several phases of orogeny in the Paleozoic and the Cenozoic, by sedimentation in shelf seas and epicontinental seas and on plains in the Permian and Mesozoic as well as by the Quaternary glaciations. Regional geological setting Germany is located between the geologically very old (Precambrian) East European Craton (Baltica) to the north and north-east (that further north is exposed as the Baltic Shield), and the geologically young (Cenozoic) Alpine-Carpathian Orogen to the south. The corresponding crustal provinces of Germany are thus geologically "middle-aged" and were accreted onto the East European Craton during the Paleozoic through plate tectonic processes. These areas form the geological basement of Germany. The basement is the oldest of the four geological crustal levels (''German: '') that overlap in Central Europe, north of the Alps. The levels mainly reflect the age relationships of rocks and the great tectonic trends ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basins Of Germany
Basin may refer to: Geography and geology * Depression (geology) ** Back-arc basin, a submarine feature associated with island arcs and subduction zones ** Debris basin, designed to prevent damage from debris flow ** Drainage basin (hydrology), a topographic region in which all water drains to a common area ** Endorheic basin, a closed topographic low area with no drainage outlet ** Impact basin, a large impact crater ** Retention basin, stormwater runoff to prevent flooding and downstream erosion which includes a permanent pool of water ** Detention basin, a man-made basin used to temporarily store surplus water from rivers. ** Sedimentary basin (sedimentology), a low and usually sinking region that is filled with sediments from adjacent higher areas ** Structural basin, rock strata formed by tectonic warping of previously flat-lying strata *** Oceanic basin, a structural basin covered by seawater *** Pull-apart basin, a section of crust separated by the action of two strike-slip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sächsisches Oberbergamt
The Saxon Mining Office (german: Sächsisches Oberbergamt) is the executive authority for mining rights in the German state of Saxony. It is also responsible for all non-metallic mineral resources on the terrain of the former East Germany. History Based on discoveries of silver in 1168, Freiberg developed into the centre of Ore Mountains and Saxon ore mining. A mining office (''Bergamt'') and master miner (''Bergmeister'') were mentioned here in 1241. Freiberg mining law ('' Bergrecht''), first laid down in writing in 1307, was subsequently adopted in many other European mining regions. In 1470 rich silver finds in the Ore Mountains (at Schneeberg Annaberg-Buchholz and Marienberg) resulted in a new (the second) ''Berggeschrey''(silver rush). The mining industry expanded rapidly, and in the wake of this growth a single mining administration was gradually set up in Albertine Saxony during the early 16th century. The Annaberg mining regulations (''Bergordnung'') enacted in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kreischa Basin
Kreischa is a municipality in the Sächsische Schweiz-Osterzgebirge district, Saxony, Germany. It directly borders the Saxon capital Dresden and consists of 14 districts. Kreischa was first mentioned in 1282 in the name ''Heinricus de Kryschowe''. The name could be derived from an Old Slavic word meaning "crooked" or "lame". Sister cities Kreischa is twinned with: * Loffenau district Rastatt, Baden-Württemberg, Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ... since 1990 Municipality subdivisions *Babisnau *Bärenklause *Brösgen *Gombsen *Kautzsch *Kleba *Kleincarsdorf *Lungkwitz *Quohren *Saida *Sobrigau *Theisewitz *Kreischa-Wittgensdorf *Zscheckwitz References {{SächsischeSchweizOsterzgebirge-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coalfield
A coalfield is an area of certain uniform characteristics where coal is mined. The criteria for determining the approximate boundary of a coalfield are geographical and cultural, in addition to geological. A coalfield often groups the seams of coal, railroad companies, cultural groups, and watersheds and other geographical considerations. At one time the coalfield designation was an important category in business and industrial discussions. The terminology declined into unimportance as the 20th century progressed, and was probably only referred to by a few small railroads and history buffs by the 1980s. Renewed interest in industrial heritage and coal mining history has brought the old names of the coalfields before a larger audience. Australia New South Wales *Gunnedah Basin coalfields *Hunter Valley coalfields *South Maitland coalfields *Sydney Basin coalfields Queensland *Bowen Basin coalfields *Galilee Basin coalfields *Surat Basin coalfields *Walloon coalfields Victoria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SDAG Wismut
SAG/SDAG Wismut was a uranium mining company in East Germany during the time of the Cold War. It produced a total of 230,400 tonnes of uranium between 1947 and 1990 and made East Germany the fourth largest producer of uranium ore in the world at the time. It was the largest single producer of uranium ore in the entire sphere of control of the USSR. In 1991 after German reunification it was transformed into the Wismut GmbH company, owned by the Federal Republic of Germany, which is now responsible for the restoration and environmental cleanup of the former mining and milling areas. The head office of SDAG Wismut / Wismut GmbH is in Chemnitz-Siegmar. History The Ore Mountains (german: Erzgebirge; cs, Krušné hory) in southern East Germany at the border with the Czech Republic are closely connected to the history of uranium exploitation. The metal was discovered in a sample from a silver mine in the mountain range, and uranium was produced first as a by-product in the early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian) and Permian times. Many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution. With the invention of the steam engine, coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity. Some iron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium
Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite. In nature, uranium is found as uranium-238 (99. ... [...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] |
