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Horst (geology)
In physical geography and geology, a horst is a raised fault block bounded by Fault (geology), normal faults. Horsts are typically found together with Graben, grabens. While a horst lifted or remains stationary, the grabens on either side Subsidence, subside. This is often caused by Extensional tectonics, extensional forces pulling apart the crust. Horsts may represent features such as plateaus, mountains, or ridges on either side of a valley. Horsts can range in size from small fault-blocks, up to large regions of stable continent that have not been not folded or warped by tectonic forces. The word ''Horst'' in German language, German means "mass" or "heap," and was first used in the geological sense in 1883 by Eduard Suess in ''The Face of the Earth.''Originally published in 1883 in German as "Das Antlitz der Erde", translated and published in English in 1904 Geomorphology Horsts may have either symmetrical or asymmetrical cross-sections. If the normal faults to either side ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zelten Oil Field
The Zelten oil field (now known as the Nasser field) is located at the foot of the Zelten Mountains, about south of Brega in Concession 6. Zelten holds the title as the largest oil field in the Gulf of Sidra. The 229 wells in Zelten use a gas lifting system. The Zelten oil field is not associated with the town Zelten, which is located in the North-West of Libya. Background Discovered in 1956, Zelten was Libya's first major oil well, producing about . In 1959, its reserves were estimated at of 38° API oil, lying at 5,500-7,600 feet. Esso Standard began production of Zelten in 1961. The Zelten gas-lift system was installed during the period from 1969 to 1971 and represented one of the first uses of gas lift on a fieldwide basis to produce the high volume wells typical of Middle East Oil fields. In 1979, approximately of total liquid was being produced by gas lift. By 2006, the accumulated production of the Zelten field reached 2,426 mmb of oil and of associated gas. Sirte Oil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graben
In geology, a graben () is a depressed block of the crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German, meaning 'ditch' or 'trench'. The word was first used in the geologic context by Eduard Suess in 1883. The plural form is either ''graben'' or ''grabens''. Formation A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with horsts. Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced from parallel normal faults, where the displacement of the hanging wall is downward, while that of the footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst typically dip away from the center line of the horst. Single or multiple graben can produce a rift valley. Half-g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticline
In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that dip away from the hinge. Anticlines can be recognized and differentiated from antiforms by a sequence of rock layers that become progressively older toward the center of the fold. Therefore, if age relationships between various rock strata are unknown, the term antiform should be used. The progressing age of the rock strata towards the core and uplifted center, are the trademark indications for evidence of anticlines on a geologic map. These formations occur because anticlinal ridges typically develop above thrust faults during crustal deformations. The uplifted core of the fold causes compression of strata that preferentially erodes to a deeper st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pirin
, photo=Pirin-mountains-Bansko.jpg , photo_caption=Pirin scenery in winter , country= Bulgaria, , parent= , geology= granite, gneiss, marble, limestone , area_km2=2585 , range_coordinates = , length_km=80 , length_orientation= north-south , width_km=40 , width_orientation= north-south , highest= Vihren , elevation_m=2915 , coordinates = , map_image=Bulgaria Pirin mountain geographic map bg.svg The Pirin Mountains ( bg, Пирин ) are a mountain range in southwestern Bulgaria, with Vihren at an altitude of 2,914 m being the highest peak. The range extends about 80 km from the north-west to the south-east and is about 40 km wide, spanning a territory of . To the north Pirin is separated from Bulgaria's highest mountain range, the Rila Mountain, by the Predel saddle, while to the south it reaches the Slavyanka Mountain. To the west is located the valley of the river Struma and to the east the valley of the river Mesta separates it from the Rh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belasitsa
Belasica ( Macedonian and Bulgarian: , also translit. ''Belasitsa'' or ''Belasitza'', Ottoman Turkish: بلش Turkish: ''Beleş''), Belles ( el, Μπέλλες, ''Bélles'') or Kerkini (, ''Kerkíni'';), is a mountain range in the region of Macedonia in Southeastern Europe, shared by northeastern Greece (about 45%), southeastern North Macedonia (35%) and southwestern Bulgaria (20%). Geography The mountain range is fault-block mountain about long and wide and is situated just northeast of Dojran Lake. The highest point is Radomir (Kalabaka) at 2,031 m, with elevation otherwise ranging between 300 and 1900 m above sea level. The borders of all three countries meet at Tumba Peak. The climate in the area shows strong Mediterranean influence. The area of Belasica became a euroregion in 2003. Two football teams are named after the mountain range, PFC Belasitsa from the nearby Bulgarian town of Petrich and FC Belasica from Strumica in North Macedonia. History Since ancient t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massif
In geology, a massif ( or ) is a section of a planet's crust that is demarcated by faults or flexures. In the movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. The term also refers to a group of mountains formed by such a structure. In mountaineering and climbing literature, a massif is frequently used to denote the main mass of an individual mountain. The massif is a smaller structural unit of the crust than a tectonic plate, and is considered the fourth-largest driving force in geomorphology. The word is taken from French (in which the word also means "massive"), where it is used to refer a large mountain mass or compact group of connected mountains forming an independent portion of a range. One of the most notable European examples of a massif is the Massif Central of the Auvergne region of France. The Face on Mars is an example of an extraterrestrial massif. Massifs may also form underwater, as with the Atlanti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodope Mountains
The Rhodopes (; bg, Родопи, ; el, Ροδόπη, ''Rodopi''; tr, Rodoplar) are a mountain range in Southeastern Europe, and the largest by area in Bulgaria, with over 83% of its area in the southern part of the country and the remainder in Greece. Golyam Perelik is its highest peak at . The mountain range gives its name to the terrestrial ecoregion Rodope montane mixed forests that belongs in the temperate broadleaf and mixed forests biome and the Palearctic realm. The region is particularly notable for its karst areas with their deep river gorges, large caves and specific sculptured forms, such as the Trigrad Gorge. A significant part of Bulgaria's hydropower resources are located in the western areas of the range. There are a number of hydro-cascades and dams used for electricity production, irrigation, and as tourist destinations. In Greece, there are also the hydroelectric power plants of Thisavros and Platanovrysi. The Rhodopes have a rich cultural heritage including a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rila
Rila ( bg, Рила, ) is the highest mountain range of Bulgaria, the Balkans, Balkan Peninsula and Southeast Europe. It is situated in southwestern Bulgaria and forms part of the Rila–Rhodope Mountains, Rhodope Massif. The highest summit is Musala at an elevation of 2,925 m which makes Rila the sixth highest mountain range in Europe after the Caucasus, the Alps, Sierra Nevada (Spain), Sierra Nevada, the Pyrenees and Mount Etna, and the highest one between the Alps and the Caucasus. It spans a territory of 2,629 km2 with an average elevation of 1487 m. The mountain is believed to have been named after the Rilska River, river of the same name, which comes from the Old Bulgarian language, Old Bulgarian verb "рыти" meaning "to grub". Rila has abundant water resources. Some of the Balkans' longest and deepest rivers originate from Rila, including the Maritsa, Iskar (river), Iskar and Nestos (river), Mesta rivers. Bulgaria's main water divide separating the Black Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dole, Jura
Dole (, sometimes pronounced ) is a commune in the Jura department, of which it is a subprefecture (''sous-préfecture''), in the Bourgogne-Franche-Comté region, in Eastern France. In 2019, it had a population of 23,711. History Dole was the capital of Franche-Comté until Louis XIV conquered the region; he shifted the '' parlement'' from Dole to Besançon. The university, founded by Duke Philippe le Bon of Burgundy in 1422, was also transferred to Besançon at that time. In January 1573, Gilles Garnier was put to death after being found guilty of lycanthropy and witchcraft. He had confessed to murdering and cannibalizing at least six children. The 1995 film '' Happiness Is in the Field'' was set in Dole and The Widow Couderc was also partially filmed there. Geography Dole is located on the river Doubs. The commune has a land area of . Demographics It is the largest commune in Jura, although the préfecture is Lons-le-Saunier. Transport Dole-Ville station has r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jura Mountains
The Jura Mountains ( , , , ; french: Massif du Jura; german: Juragebirge; it, Massiccio del Giura, rm, Montagnas da Jura) are a sub-alpine mountain range a short distance north of the Western Alps and mainly demarcate a long part of the French–Swiss border. While the Jura range proper (" folded Jura", ''Faltenjura'') is located in France and Switzerland, the range continues as the Table Jura ("not folded Jura", ''Tafeljura'') northeastwards through northern Switzerland and Germany. Name The mountain range gives its name to the French department of Jura, the Swiss Canton of Jura, the Jurassic period of the geologic timescale, and the Montes Jura of the Moon. It is first attested as ''mons Iura'' in book one of Julius Caesar's ''Commentarii de Bello Gallico''. Strabo uses a Greek masculine form ''ὁ Ἰόρας'' ("through the Jura mountains", ''διὰ τοῦ Ἰόρα ὄρους'') in his ''Geographica'' (4.6.11). Based on suggestions by Ferdinand de Saussure, early c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Table Mountain
Table Mountain ( naq, Huriǂoaxa, lit= sea-emerging; af, Tafelberg) is a flat-topped mountain forming a prominent landmark overlooking the city of Cape Town in South Africa. It is a significant tourist attraction, with many visitors using the cableway or hiking to the top. Table Mountain National Park is the most visited national park in South Africa, attracting 4.2 million people every year for various activities. The mountain has 8,200 plant species, of which around 80% are fynbos, meaning fine bush. It forms part of the Table Mountain National Park, and part of the lands formerly ranged by Khoe-speaking clans, such as the (the "High Clan"). It is home to a large array of mostly endemic fauna and flora. Features The main feature of Table Mountain is the level plateau approximately from side to side, edged by steep cliffs. The plateau, flanked by Devil's Peak to the east and by Lion's Head to the west, forms a dramatic backdrop to Cape Town. This broad sweep of mount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
