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Weiselberg
The Weiselberg is a hill in the North Palatine Uplands near Oberkirchen in the Saarland county of St. Wendel. The Weiselberg is covered in forest, especially on its upper slopes and is a habitat for rare species of plant. It was made a nature reserve in 1950. Geography Location The Weiselberg is located in the southeastern part of the Saar-Hunsrück Nature Park immediately west of the village of Oberkirchen through which flows the Blies tributary of the Oster which rises on the north-northwest of the hill. Oberkirchen itself is in the municipality of Freisen. To the west-northwest rises the Leichweilerbach, a left-hand headstream of the ''Betzelbach''. To the south is the ''Weiseler Born'', the source of the Oster tributary, the ''Wilmesbach''. The northern hill spur of the Weiselberg is the roughly -high Mittelberg, whose terrain transitions into the hill of Hochrech. Natural regions The Weiselberg lies in the natural regional major unit group of the Saar-Nahe U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Palatine Uplands
The North Palatine Uplands (german: Nordpfälzer Bergland), sometimes shortened to Palatine Uplands (''Pfälzer Bergland''), is a low mountain range and landscape unit A natural region (landscape unit) is a basic geographic unit. Usually, it is a region which is distinguished by its common natural features of geography, geology, and climate. From the ecological point of view, the naturally occurring flora and ... in the German state of Rhineland-Palatinate and belongs mainly to the Palatinate (region), Palatinate region. It is part of the Saar-Nahe Uplands. Geography Location The North Palatine Uplands lie – roughly stated – between St. Wendel in the state of Saarland to the west and three towns belonging to Rhineland-Palatinate: Alzey to the east, Kaiserslautern to the south and Bad Kreuznach to the north, although these towns are not actually within the region itself. The North Palatine Uplands thus links the landscapes of the Palatine Forest, Saar-Hunsrück Nature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacitic
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form transitions to the rhyolites. The relative proportions of feldspars and quartz in dac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weiselbergite
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form transitions to the rhyolites. The relative proportions of feldspars and quartz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dacite
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained ( aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz. Dacite is relatively common, occurring in many tectonic settings. It is associated with andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Composition Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene ( augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in small proportions, in some dacites, and when abundant gives rise to rocks that form transitions to the rhyolites. The relative proportions of feldspars a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oster (Blies)
The Oster is a river of Saarland, Germany. It flows into the Blies near Neunkirchen. Course The Oster originates in the Saar-Hunsrück Nature Park, a little west-northwest of Oberkirchen. It flows from the Oster spring, southeast of the Füsselberg and northwest of the Mittelberg, in the northern foothills of the Weiselberg. Initially, the Oster, flows along the Ostertal Railway from Fürth east to Oberkirchen and then south through the place where it the Oberkirchen Talbrücke crosses. From then on the stream continues in this direction to Hoof and then along the B420 via Marth and Niederkirchen to Werschweiler, where it leaves the Saar-Hunsrück Nature Park. It then flows through Dörrenbach and Fürth to Hangard. Finally, the Oster, now flowing westward for its last few kilometers, joins the south-flowing Blies at Wiebelskirchen after a total drop of . History After being straightened over long stretches in the 1930s, 60s, and 70s, the Oster has been renaturalized pieceme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth's Crust
Earth's crust is Earth's thin outer shell of rock, referring to less than 1% of Earth's radius and volume. It is the top component of the lithosphere, a division of Earth's layers that includes the crust and the upper part of the mantle. The lithosphere is broken into tectonic plates whose motion allows heat to escape from the interior of the Earth into space. The crust lies on top of the mantle, a configuration that is stable because the upper mantle is made of peridotite and is therefore significantly denser than the crust. The boundary between the crust and mantle is conventionally placed at the Mohorovičić discontinuity, a boundary defined by a contrast in seismic velocity. The temperature of the crust increases with depth, reaching values typically in the range from about to at the boundary with the underlying mantle. The temperature increases by as much as for every kilometer locally in the upper part of the crust Composition File:Elemental abundances.svg, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (geology)
Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. The term is similar to the term type site in archaeology or the term type specimen in biology. Examples of geological type localities Rocks and minerals * Aragonite: Molina de Aragón, Guadalajara, Spain * Autunite: Autun, France * Benmoreite: Ben More (Mull), Scotland * Blairmorite: Blairmore, Alberta, Canada * Boninite: Bonin Islands, Japan * Comendite: Comende, San Pietro Island, Sardinia * Cummingtonite: Cummington, Massachusetts * Dunite: Dun Mountain, New Zealand. * Essexite: Essex County, Massachusetts, US * Fayalite: Horta, Fayal Island, Azores, Portugal * Harzburgite: Bad Harzburg, Germany * Icelandite: Thingmuli (Þingmúli), Iceland * Ijolite: Iivaa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Heinrich Rosenbusch
(Karl) Heinrich/Harry (Ferdinand) Rosenbusch (24 June 1836 – 20 January 1914) was a German petrographer. Harry Rosenbusch was born in Einbeck. He taught at Heidelberg University (1877–1908), where he founded the ''Mineralogisches-geologisches Institut''. He died, aged 77, in Heidelberg Heidelberg (; Palatine German language, Palatine German: ''Heidlberg'') is a city in the States of Germany, German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914 .... Literary works * ''Mikroskopische Physiographie der petrographisch wichtigen Mineralien'', 1873 * ''Mikroskopische Physiographie der Mineralien und Gesteine'', 4 Vols., 1873-1877 * ''Elemente der Gesteinslehre'', 1898 * ''Mikroskopische Physiographie'' (4th ed., Stuttgart, 1909, 2 vols.) References External links * — He is mention a number of times in the article specifically: "the more basic minerals precede the less basic; ... is kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feldspars and the ''alkali'' (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight. Feldspars crystalize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oberkirchen Viaduct
{{Disambiguation, geo ...
Oberkirchen may refer to: Places * Oberkirchen (Freisen), is a locality in the municipality Freisen in Saarland, Germany *Oberkirchen (Schmallenberg), is a locality in the municipality Schmallenberg in North Rhine-Westphalia, Germany See also *Obernkirchen Obernkirchen () is a town in the district of Schaumburg, in Lower Saxony, Germany. It is situated approximately 8 km southwest of Stadthagen, and 15 km east of Minden. Obernkirchen is a small town in the shadows of the Bückeberg, a hil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma
Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besides molten rock, magma may also contain suspended crystals and gas bubbles. Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing. Following its ascent through the crust, magma may feed a volcano and be extruded as lava, or it may solidify underground to form an intrusion, su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roman Times
In modern historiography, ancient Rome refers to Roman civilisation from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC), Roman Republic (509–27 BC) and Roman Empire (27 BC–476 AD) until the fall of the western empire. Ancient Rome began as an Italic settlement, traditionally dated to 753 BC, beside the River Tiber in the Italian Peninsula. The settlement grew into the city and polity of Rome, and came to control its neighbours through a combination of treaties and military strength. It eventually dominated the Italian Peninsula, assimilated the Greek culture of southern Italy (Magna Grecia) and the Etruscan culture and acquired an Empire that took in much of Europe and the lands and peoples surrounding the Mediterranean Sea. It was among the largest empires in the ancient world, with an estimated 50 to 90 million inhabitants, roughly 20% of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
