|
Tagus Basin
The Tagus Basin is the drainage basin of the Tagus, Tagus River, which flows through the west of the Iberian Peninsula and empties into Lisbon. It covers an area of 78,467 Square kilometre, km2, which is distributed 66% (55,645 Square kilometre, km2) on Spain, Spanish territory and 34% on Portugal, Portuguese land (22,822 km2). It is the third largest basin in the Iberian Peninsula, after the Douro Basin, with 98,258 Square kilometre, km2, and the Ebro Basin, with 82,587 Square kilometre, km2. Physical environment The Tagus basin is one of the most important in the Peninsula, due to its extension and its flow, being the one with the highest population density in Spain and the Iberian Peninsula, peninsula. It is formed by an elongated surface with an east–west orientation, the Tagus, Tagus River flows from the Sierra de Albarracín, where it has its source, to the estuary, Mar de la Paja, next to Lisbon, through the center of the Hesperian Massif with a length of 910 K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montes De Toledo
The Montes de Toledo are one of the main systems of mountain ranges in the Iberian Peninsula. They divide the drainage basin of the Tagus from the basin of the Guadiana. The highest peak is high La Villuerca. Description The Montes de Toledo are located in the central regions of the Iberian Peninsula, cutting transversally from east to west across the lower portion of the Meseta Central. The length of the Montes de Toledo is and their maximum width up to near Sonseca and Puertollano. The eastern Montes de Toledo ranges form one of the natural limits of the historical La Mancha region in Castile-La Mancha and the western end, including the ranges forming the broader Montes de Toledo, reaches into Portalegre District, Portugal. Geology Geologically the series of ranges making up the system were formed by Alpine orogeny, but unlike the Central System further north the Montes de Toledo comprise an older terrain of elongated belts of folded and thrust faulted sedimentary rocks t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meters Above Sea Level
Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The combination of unit of measurement and the physical quantity (height) is called "metres above mean sea level" in the metric system, while in United States customary and imperial units it would be called "feet above mean sea level". Mean sea levels are affected by climate change and other factors and change over time. For this and other reasons, recorded measurements of elevation above sea level at a reference time in history might differ from the actual elevation of a given location over sea level at a given moment. Uses Metres above sea level is the standard measurement of the elevation or altitude of: * Geographic locations such as towns, mountains and other landmarks. * The top of buildings and other structures. * Flying objects such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra De Guadarrama
The Sierra de Guadarrama (Guadarrama Mountains) is a mountain range forming the main eastern section of the Sistema Central, the system of mountain ranges along the centre of the Iberian Peninsula. It is located between the systems Sierra de Gredos in the province of Ávila, and Sierra de Ayllón in the province of Guadalajara. The range runs southwest–northeast, extending from the province of Ávila in the southwest, through the Community of Madrid, to the province of Segovia in the northeast. The range measures approximately in length. Its highest peak is Peñalara, in elevation. The flora of the Sierra de Guadarrama are characterized in the higher elevation Atlantic vegetation region with Juniper groves, montane grasslands, Spanish broom thickets, pine forests, and Pyrenean Oaks forests; and in the lower elevation Mediterranean vegetation region by Holm oak forests. while the pastures around the summits are fringed by juniper and Spanish broom shrubs. The mount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra De Gredos
The Sierra de Gredos is a mountain range in central Spain that spans the provinces of Ávila, Salamanca, Cáceres, Madrid, and Toledo. It is part of the much larger Sistema Central of mountain ranges. Its highest point is Pico Almanzor, at 2,592 metres and it has been declared a natural park by the Autonomous Community of Castile and León. The Sierra de Gredos is one of the most extensive mountain ranges of the Central System; it comprises five river valleys: the Alto Tormes, the Alto Alberche, the Tiétar Oriental, the Tiétar Occidental y la Vera, and the Valle del Ambroz. The first known inhabitants were the Vettones, a pre-Roman Celtic people. The central part of the range encomprises the Sierra de Gredos Regional Park. Geology The Sierra de Gredos comprises mainly granite, which is a common type of intrusive, felsic, igneous rock which is granular and phaneritic in texture. This rock consists mainly of quartz, mica, and feldspar. In some Gredos rocks the feldspar cryst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra De Béjar (mountain Range)
The Sierra de Béjar is a mountain range near the center of the Iberian Peninsula. Geography The highest point of the range is Canchal de la Ceja, at 2428 metres.Carrasco, Villa, Pedraza, Domínguez-Villar y Willenbring, 2011, pp. 125-135. Some geographers consider Sierra de Béjar as the westernmost part of sierra de Gredos. See also * Sistema Central * Béjar Béjar () is a town and Municipalities in Spain, municipality of Spain located in the province of Salamanca, autonomous community of Castile and León. As of 2018, it had a population of 12,961. The historical development of the town has been link ... Bibliography * * * References Bejar Geography of the Province of Ávila Geography of the Province of Salamanca Bejar {{Spain-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principales Cuencas Del Tajo
Principales may refer to: * In Philippine history, members of the Principalía The ''principalía'' or Nobility, noble class was the ruling and usually educated upper class in the ''Municipality, pueblos'' of History of the Philippines (1521–1898), Spanish Philippines, comprising the ''gobernadorcillo'' (later called th ... * In Roman history, certain military officers, see Auxilia#Junior officers (principales) {{Disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenozoic
The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configuration of continents. It is the latest of three geological eras since complex life evolved, preceded by the Mesozoic and Paleozoic. It started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body, the Chicxulub impactor. The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammalsthe eutherians (placentals) in the northern hemisphere and the metatherians (marsupials, now mainly restricted to Australia) in the southern hemisphere. The extinction of many groups allowed mammals and birds to greatly diversify so that l ... [...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] |
Variscan Orogeny
The Variscan or Hercynian orogeny was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'', comes from the Medieval Latin name for the district '' Variscia'', the home of a Germanic tribe, the Varisci; Eduard Suess, professor of geology at the University of Vienna, coined the term in 1880. (Variscite, a rare green mineral first discovered in the Vogtland district of Saxony in Germany, which is in the Variscan belt, has the same etymology.) ''Hercynian'', on the other hand, derives from the Hercynian Forest. Both words were descriptive terms of strike directions observed by geologists in the field, ''variscan'' for southwest to northeast, ''hercynian'' for northwest to southeast. The ''variscan'' direction reflected the direction of ancient fold belts cropping out throughout Germany and adjacent countries and the meaning shifted from d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Júcar Basin
left The Júcar () or Xúquer () is a river on the Iberian Peninsula of Spain. The river runs for approximately 509 km from its source at Ojuelos de Valdeminguete, on the eastern flank of the Montes Universales, Sistema Ibérico. Its most important tributary is the Cabriel. River Júcar flows first southward and then eastward through the towns of Cuenca, Alcalá del Júcar, Cofrentes, Alzira, Sueca and Cullera, a town located near its mouth into the Gulf of Valencia, Mediterranean Sea. It crosses the provinces of Cuenca, Albacete and Valencia In 1982 the river Júcar broke the Tous's reservoir, causing the biggest flood in Spanish history with a flow speed of 16,000 cubic metres per second, killing more than 30 people. This flood was the most important one in the whole history of Spain in that times because the people thought that the Tous reservoir was indestructible. The flood was called ''La pantanada de Tous''. See also * List of rivers of Spain * Rambla del Poyo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadiana Basin
The Guadiana River (, also , , ), or Odiana, is an international river defining a long stretch of the Portugal-Spain border, separating Extremadura and Andalusia (Spain) from Alentejo and Algarve (Portugal). The river's basin extends from the eastern portion of Extremadura to the southern provinces of the Algarve; the river and its tributaries flow from east to west, then south through Portugal to the border towns of Vila Real de Santo António (Portugal) and Ayamonte (Spain), where it flows into the Gulf of Cádiz. With a course that covers a distance of , it is the fourth-longest in the Iberian peninsula, and its hydrological basin extends over an area of approximately (the majority of which lies within Spain). Etymology The Romans referred to the river as the , the "River of Ducks". During the Moorish occupation and settlement, the name was extended and referred to as ''Wadi Ana'' (''wādī'' being the Arab term for "river"), later passed on to Portuguese and Spanish settle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
