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71-774: The Matarranya flows roughly from south to north into the Ebro (Ebre), 4 km east of Faió (Fayón). This river gives its name to the Matarranya Catalan language -speaking comarca of Aragon. 41°11′00.89″N 00°09′50.51″E  /  41.1835806°N 0.1640306°E  / 41.1835806; 0.1640306 This article related to a river in Spain is a stub . You can help Misplaced Pages by expanding it . Ebro The Ebro ( Spanish and Basque [ˈeβɾo] ; Catalan : Ebre , Western: [ˈeβɾe] , Eastern: [ˈeβɾə] )

142-615: A maximum altitude of 3,404 metres (11,168 ft) at the peak of Aneto . For the most part, the main crest forms a divide between Spain and France, with the microstate of Andorra sandwiched in between. Historically, the Crown of Aragon and the Kingdom of Navarre extended on both sides of the mountain range. In Greek mythology , Pyrene is a princess who gave her name to the Pyrenees. The Greek historian Herodotus says Pyrene

213-657: A rather dry climate. Summers of the Ebro Valley most often mirror those of a semiarid climate ; some of them see more breaks of storms or showers, yet others are more arid , bringing drought save where advanced irrigation is used. The valley flood plains experience annual rainfall between 300 and 600 mm (12–24 in), with maxima in fall and spring. It is often covered with chaparral vegetation. Summers are hot and winters are cold. The dry summer season has temperatures of more than 35 °C (95 °F), occasionally reaching over 40 °C (104 °F). In winter,

284-420: A serpent and runs away to the woods, afraid that her father will be angry. Alone, she pours out her story to the trees, attracting the attention of wild beasts who tear her to pieces. After his victory over Geryon, Hercules passes through the kingdom of Bebryx again, finding the girl's lacerated remains. As is often the case in stories of this hero, the sober Hercules responds with heartbroken grief and remorse at

355-596: A wider river valley among limestone rocks when it reaches La Rioja and Navarre . Southern tributaries rise on the nearby watershed , the Sistema Ibérico , a mountain range among those of Spain's centre. North of the headwaters is the Cantabrian mountain range (south of Bilbao and Santander ). Much of the total water volume of the Ebro comes from its northern tributaries, which drain about 2 ⁄ 3 of

426-838: Is a river of the north and northeast of the Iberian Peninsula , in Spain . It rises in Cantabria and flows 930 kilometres (580 mi), almost entirely in an east-southeast direction. It flows into the Mediterranean Sea , forming a delta in the Terres de l'Ebre region, in southern Catalonia . In the Iberian peninsula, it ranks second in length after the Tagus and second in discharge volume , and drainage basin , after

497-592: Is an astronomical observatory located at 2877 metres on top of the Pic du Midi de Bigorre in the French Pyrenees. Construction of the observatory began in 1878 and the 8-metre dome was completed in 1908. The observatory housed a powerful mechanical equatorial reflector which was used in 1909 to formally discredit the Martian canal theory. A 1.06-metre (42 in) telescope was installed in 1963, funded by NASA and

568-627: Is an end from extreme temperatures accompanied by slow-growing dwarf juniper species to unvegetated desert steppes as in "llanos de Belchite" or "Calanda desert". The mountain vegetation is mostly coniferous forests that are drought-adapted, and hardier trees in the oak genus ( Quercus ), typically less tolerant, in the wetter highlands. Halophiles ( extremophiles as to salt) abound in zones of endorheic lagoons and their feeder creeks. Tamarix -covered, these include endemic species of bryophytes , chenopodiaceas, plumbaginaceae , ruppiaceaes, Carex , lythraceaes, asteraceaes, and others. Their presence

639-535: Is attributable to its ability to colonise disturbed habitats that would deter the edible iberian crayfish . The semiaquatic rodent Myocastor coypus is beginning to expand in some northwest tributaries of the head damaging crops and protected national parks in the Basque Country . Fish caught in all lower reaches of the Ebro are high in mercury and the European Union prohibits their sale, notably

710-501: Is causing the erosion of the coastline and lack of sediment replenishment. The unstable surface is due to weather changes and tidal surges . The river floods from time to time, although advance warning can now be given as a result of monitoring within the catchment area. The river flow in Zaragoza during floods, from the end of the 19th century is as follows: The Ebro poured 1,874 million cubic metres (1,519,000 acre-feet ) into

781-510: Is in this part of the chain that granitic masses prevail. Also moving from west to east, there is a change in the composition of the flora, with the change becoming most evident as one passes the centre of the mountain chain from which point the Corbières Massif stretch north-eastwards towards the central plateau of France. Though the difference in latitude is only about 1°, in the west the flora resembles that of central Europe while in

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852-472: Is insufficient snowfall to cause their development. Glaciers are confined to the northern slopes of the central Pyrenees, and do not descend, like those of the Alps, far down into the valleys but rather have their greatest lengths along the direction of the mountain chain. They form, in fact, in a narrow zone near the crest of the highest mountains. Here, as in the other great mountain ranges of central Europe, there

923-407: Is observed at least 50% of the time above 1,600 metres (5,200 ft) between December and April. A still more marked effect of the preponderance of rainfall in the western half of the chain is seen in the vegetation. The lower mountains in the extreme west are wooded, but the extent of forest declines as one moves eastwards. The eastern Pyrenees are peculiarly wild and barren, all the more since it

994-574: Is of international importance for 8 of its plant species and 69 of its vertebrate fauna. It has some 95 breeding species of birds, is also very important for a wide range of overwintering species, and serves as an essential stopover point for large numbers of migratory birds. The Ebro delta has the world's largest colony of Audouin's gulls . In 2006 it held a record number of more than 15,000 pairs, its highest to date. The introduction of American crayfish Procambarus clarkii has resulted in economic losses, introduced elsewhere for cultivation, its success

1065-427: Is related to the marine origin of the valley and the extensive marine deposits. Just as it enters Catalonia, the valley narrows, and the river becomes constrained by mountain ranges, making wide bends. 3 massive dams have been built in this area: Mequinenza dam ( Province of Zaragoza , 1955), Riba-roja dam (1955), and Flix dam (1948), the latter two in the province of Tarragona . In the final section of its course

1136-400: Is substantial evidence of a much wider expanse of glaciation during the glacial periods . The best evidence of this is in the valley of Argeles Gazost, between Lourdes and Gavarnie, in the département of Hautes-Pyrénées. The annual snow-line varies in different parts of the Pyrenees from about 2,700 to 2,800 metres (8,900 to 9,200 ft) above sea level. In average the seasonal snow

1207-429: Is the complete list of the summits of the Pyrenees above 3,000 metres: Both sides of the Pyrenees are popular spots for winter sports such as alpine skiing and mountaineering . The Pyrenees are also a good place for athletes to do high-altitude training in the summertime, such as by bicycling and cross-country running. In the summer and the autumn , the Pyrenees are usually featured in two of cycling's grand tours,

1278-465: Is the most important river in Spain in terms of length, 928 km (577 mi), and area of drainage basin, 85,550 km (33,030 sq mi). However, the mean annual flow decreased by approximately 29 percent during the 20th century due to many causes: the construction of dams, the increasing demands for irrigation and the evaporation (higher than the rainfall, due to low rainfall, high sunshine and strong and dry winds) from reservoirs in

1349-551: Is the name of a town in Celtic Europe . According to Silius Italicus , she was the virgin daughter of Bebryx , a king in Mediterranean Gaul by whom the hero Hercules was given hospitality during his quest to steal the cattle of Geryon during his famous Labours . Hercules, characteristically drunk and lustful, violates the sacred code of hospitality and rapes his host's daughter. Pyrene gives birth to

1420-665: The Ariège area, the mean elevation is remarkably uniform until a sudden decline occurs in the easternmost portion of the chain known as the Albères . Most foothills of the Pyrenees are on the Spanish side, where there is a large and complex system of ranges stretching from Spanish Navarre , across northern Aragon and into Catalonia, almost reaching the Mediterranean coast with summits reaching 2,600 m (8,500 ft). At

1491-746: The Douro . It is the longest river entirely within Spain; the other two mentioned flow into Portugal . The Ebro flows through many cities ( Spanish : ciudades ): Reinosa in Cantabria ; Frías and Miranda de Ebro in Castile and León ; Haro , Logroño , Calahorra , and Alfaro in La Rioja ; Tudela in Navarre ; Alagón , Utebo , and Zaragoza in Aragon ; and Flix , Móra d'Ebre , Benifallet , Tivenys , Xerta , Aldover , Tortosa , and Amposta in

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1562-740: The Pyrenees National Park ). The independent principality of Andorra is sandwiched in the eastern portion of the mountain range between the Spanish Pyrenees and French Pyrenees . Physiographically , the Pyrenees may be divided into three sections: the Atlantic (or Western), the Central, and the Eastern Pyrenees. Together, they form a distinct physiographic province of the larger Alpine System division. In

1633-523: The Second Punic War . One of the earliest Cistercian monasteries in Spain, Real Monasterio de Nuestra Señora de Rueda ( lit.   ' Royal ' Monastery of Our Lady of the Wheel), is located on the banks of the Ebro in Aragon . Established in 1202, the edifice survives intact. The monastery is strongly connected to the Ebro, since it used one of the first large waterwheels built for

1704-484: The Terres de l'Ebre ('Ebro Lands') region, Catalonia , is at 340 km (130 sq mi), or 20km² less, one of the largest wetlands of the western Mediterranean. Designated a Ramsar site , it has entirely grown on soils washed downriver—the historical rate of growth of the delta is demonstrated by the town of Amposta . Recorded and thus confirmed as a seaport in the Roman Warm Period in

1775-731: The Tour de France held annually in July and the Vuelta a España held in September. The stages held in the Pyrenees are often crucial legs of both tours, drawing hundreds of thousands of spectators to the region. Three main long-distance footpaths run the length of the mountain range: the GR 10 across the northern slopes, the GR 11 across the southern slopes, and the HRP which traverses peaks and ridges along

1846-509: The caverns of Ariège, the principal genera of which are Anophthalmus and Adelops . The Pyrenean ibex , an endemic subspecies of the Iberian ibex , became extinct in January 2000; another subspecies, the western Spanish ibex , was introduced into the area, with the population numbering over 400 individuals as of 2020. The native brown bear population was hunted to near-extinction in

1917-690: The province of Tarragona ( Catalonia ). The source of the river Ebro is in the Cantabrian Mountains , in Fontibre , Cantabria ( Fontibre is from Latin Fontes Iberis , i.e. 'source of the Ebro'). Close by is a large artificial lake , Embalse del Ebro , created by its damming. The upper Ebro rushes through rocky gorges in Burgos Province . Flowing roughly eastwards it passes las conchas de Haro and begins forming

1988-501: The 1990s, but its numbers rebounded in 1996 when three bears were brought from Slovenia . The bear population has bred successfully, and there are now believed to be about 15 brown bears in the central region around Fos , with only four native ones still living in the Aspe Valley . Principal nature reserves and national parks: In 1997, part of the Pyrenees (including Ordesa y Monte Perdido National Park and Pyrenees National Park)

2059-459: The 4th century, it is now well inland from the mouths. The rounded form of the delta attests to the subsequent balance between sediment deposition by the Ebro and removal of this material by wave erosion . The modern delta is in intensive agricultural use for rice, fruit (in particular citrus), and vegetables. The Ebro delta also has numerous beaches, marshes, and salt pans that provide habitat for over 300 species of birds. The Ebro delta

2130-526: The Atlantic Ocean over the Bay of Biscay . After dropping its moisture over the western and central Pyrenees, the air is left dry over the eastern Pyrenees. The winter average temperature is −2 °C (28 °F). Sections of the mountain range vary in more than one respect. There are some glaciers in the western and snowy central Pyrenees, but there are no glaciers in the eastern Pyrenees because there

2201-600: The Earth's crust first affected the eastern part and moved progressively to the entire chain, culminating in the Eocene Epoch. The eastern part of the Pyrenees consists largely of granite and gneissose rocks, while in the western part the granite peaks are flanked by layers of limestone . The massive and unworn character of the chain comes from its abundance of granite, which is particularly resistant to erosion , as well as weak glacial development. The upper parts of

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2272-431: The Ebro that Wels catfish have not colonized were not affected. The ecology of the river also now has the problem of a major increase in aquatic vegetation, seaweed and algae. Pyrenees The Pyrenees are a mountain range straddling the border of France and Spain . They extend nearly 500 km (310 mi) from their union with the Cantabrian Mountains to Cap de Creus on the Mediterranean coast, reaching

2343-568: The Elder connects the story of Hercules and Pyrene to Lusitania , but rejects it as fabulosa , highly fictional. Other classical sources derived the name from the Greek word for fire, Ancient Greek : πῦρ (IPA: /pŷːr/ ). According to Greek historian Diodorus Siculus "in ancient times, we are told, certain herdsmen left a fire and the whole area of the mountains was entirely consumed; and due to this fire, since it raged continuously day after day,

2414-732: The Northwest margin of Gondwana , where they formed a lateral continuity of neighbouring areas, such as the Montagne Noire and the Mouthoumet massifs and Southwestern territory of Sardinia . Between 100 and 150 million years ago, during the Early Cretaceous Period, the Bay of Biscay fanned out , pushing present-day Spain against France and applying intense compressional pressure to large layers of sedimentary rock . The intense pressure and uplifting of

2485-577: The Pyrenees contain low-relief surfaces forming a peneplain . This peneplain originated no earlier than in Late Miocene times. Presumably it formed at height as extensive sedimentation raised the local base level considerably. Conspicuous features of Pyrenean scenery are: The highest waterfall is Gavarnie (462 m or 1,515 ft), at the head of the Gave de Pau ; the Cirque de Gavarnie , in

2556-784: The Romans), statuary white marbles as well as coloured marbles used to decorate the royal palaces of the Louvre and Versailles in France and the Royal Palace of Madrid in Spain. Mineral springs are abundant and remarkable, and especially noteworthy are the hot springs . The hot springs, among which those of Les Escaldes in Andorra, Panticosa and Lles in Spain, Ax-les-Thermes , Bagnères-de-Luchon and Eaux-Chaudes in France may be mentioned, are sulfurous and mostly situated high, near

2627-701: The Wels catfish's introduction in the Mequinenza reservoir in 1974, it has spread to other parts of the Ebro and its tributaries, especially the Segre . Some endemics species of iberian barbels , genus Barbus in the Cyprinidae , have declined drastically, having once been abundant, especially in the Ebro. Competition and predation by Wels catfish caused its complete disappearance in the middle channel Ebro around 1990. Barbel species from mountain stream tributaries of

2698-716: The Western Pyrenees, from the Basque mountains near the Bay of Biscay of the Atlantic Ocean, the average elevation gradually increases from west to east. The Central Pyrenees extend eastward from the Somport pass to the Aran Valley , and they include the highest summits of this range: In the Eastern Pyrenees, with the exception of one break at the eastern extremity of the Pyrénées Ariégeoises in

2769-407: The actions of his darker self, and lays Pyrene to rest tenderly, demanding that the surrounding geography join in mourning and preserve her name: "struck by Herculean voice, the mountaintops shudder at the ridges; he kept crying out with a sorrowful noise 'Pyrene!' and all the rock-cliffs and wild-beast haunts echo back 'Pyrene!' ... The mountains hold on to the wept-over name through the ages." Pliny

2840-670: The area are Spanish, French, Aragonese , Catalan (in Andorra and in Northern and Southern Catalonia ), and Basque . Also spoken, to a lesser degree, is the Occitan language , consisting of the Gascon and Languedocien dialects in France and the Aranese dialect in the Aran Valley . An important feature of rural life in the Pyrenees is ' transhumance ', the moving of livestock from

2911-839: The central Pyrenees and the Iberian System discharge large amounts of water, especially in spring during the thawing season of the mountain snow. The biomes are diverse in these Mediterranean climate zones: Mediterranean forests, woodlands, and scrub . Hinterlands are particularly distinctive on account of extensive sclerophyll shrublands known as maquis , or garrigues. The dominant species are Quercus coccifera (in drier areas) and Quercus ilex . These trees form monospecific communities or communities integrated with Pinus , Mediterranean buckthorns , Myrtus , Chamaerops humilis , junipers , Pistacia , Rosmarinus , Thymus , and so on. The hinterland climate becomes progressively more continental and drier, and therefore there

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2982-410: The contact of the granite with the stratified rocks. The lower springs, such as those of Bagnères-de-Bigorre ( Hautes-Pyrénées ), Rennes-les-Bains ( Aude ), and Campagne-sur-Aude (Aude), are mostly selenitic and not hot. The amount of precipitation the range receives, including rain and snow, is much greater in the western than in the eastern Pyrenees because of the moist air that blows in from

3053-538: The delta from 27 March 2007 to 11 April 2007, with an average of 117 million cubic metres (95,000 acre-feet) per day. Academics and local government have criticised ecological impacts of: In past times numerous lagoons , endorheic saltwater ponds , and freshwater swamps and marshes were drained, dried or filled. Almost entire riparian forests were cleared for crops or for pulpwood forest plantations. Due to these changes numerous plant and animal species have disappeared. Due to dams and hydraulic canalization,

3124-659: The dividing line between Roman (north) and Carthaginian (south) expansions after the First Punic War (264–241 BC). When the Roman Republic , fearful of Hannibal 's growing influence in the Iberian Peninsula, made the city of Saguntum (considerably south of the Ebro) a protectorate of Rome, Hannibal viewed the treaty violation as an aggressive action by Rome and used the event as the catalyst to

3195-407: The dynamics of the river have been altered and new scroll-bars , new oxbow lakes , and new abandoned meanders will not now be created. Over a period of time, many of these phenomena tend to dry out or fill in with sediments. Some small representatives of these river dynamics and wetlands are protected. The Ebro Delta Natural Park, covering 7,802 hectares (19,280 acres), was finalised in 1986 and

3266-522: The east it is distinctly Mediterranean in character. The Pyrenees are nearly as rich in endemic species as the Alps, and among the most remarkable instances of that endemism is the occurrence of the monotypic genus Xatardia (family Apiaceae ), which grows only on a high alpine pass between the Val d'Eynes and Catalonia . Other examples include Arenaria montana , Bulbocodium vernum , and Ranunculus glacialis . The genus most abundantly represented in

3337-695: The eastern end on the southern side lies a distinct area known as the Sub-Pyrenees . On the French side the slopes of the main range descend abruptly and there are no foothills except in the Corbières Massif in the northeastern corner of the mountain system. The Pyrenees are older than the Alps : their sediments were first deposited in coastal basins during the Paleozoic and Mesozoic eras. During Ediacaran to Ordovician times, Pyrenees were located at

3408-599: The ecologic and economic resources of the delta. The Greeks called the river Ἴβηρ ( Ibēr ), abir , ah'ir and the Romans called it the Hibēr , Ibēr , or Ibērus flūmen , leading to its current name. The Iberian Peninsula and the Hibērī or Ibērī (the people of the area) were named after the river. It is not known with any certainty whether the Greeks used a local native name for

3479-573: The effect of thermal shocks. No big cities are in the range itself. The largest urban area close to the Pyrenees is Toulouse ( Haute-Garonne ), France with a population of 1,330,954 in its metropolitan area. On the Spanish side Pamplona ( Navarre ) is the closest city, with a population of 319,208 in its metropolitan area. Inside the Pyrenees the main towns are Andorra la Vella (22,256) and Escaldes-Engordany (14,367) in Andorra, Jaca (12,813) and La Seu d'Urgell (12,252) in Spain, and Lourdes (13,976) and Foix (10,046) in France. The following

3550-443: The farms in the valleys up to the higher grounds of the mountains for the summer. In this way the farming communities could keep larger herds than the lowland farms could support on their own. The principal animals moved were cows and sheep , but historically most members of farming families also moved to the higher pastures along with their animals, so they also took with them pigs , horses and chickens . Transhumance thus took

3621-537: The foot of Canigou in Pyrénées-Orientales long ago. Coal deposits capable of being profitably worked are situated chiefly on the Spanish slopes, but the French side has beds of lignite . The open pit of Trimoun near the commune of Luzenac (Ariège) is one of the greatest sources of talc in Europe. There are many marble quarries in the Pyrenees, most of which were opened by the Romans in ancient times. Quarried intermittently, they provided prestigious marbles such as Grand Antique (used in Rome and Constantinople by

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3692-456: The form of a mass biannual migration, moving uphill in May or June and returning to the farms in September or October. During the summer period, the families would live in basic stone cabins in the high mountains. Nowadays, industrialisation and changing agriculture practices have diminished the custom. However, the importance of transhumance continues to be recognised through its celebration in popular festivals. The Pic du Midi Observatory

3763-419: The huge Wels catfish . The zebra mussel , an invasive species , is expanding upstream in the Ebro's waters. Due to its rapid rate of reproduction, the species adversely affects the port's underwater machinery as well as that of dams and hydroelectric plants, in addition to competing with native species. Following the introduction of Wels catfish, many fish species' numbers are in clear and rapid decline. Since

3834-454: The largest telescope in France. Overtaken by the giant telescopes built in recent decades, today the observatory is widely open to amateur astronomy. The Odeillo solar furnace is the world's largest solar furnace. It is situated in Font-Romeu-Odeillo-Via, in the department of Pyrénées-Orientales , in south of France. Built between 1962 and 1968, it is 54 metres (177 ft) and 48 metres (157 ft) wide, and includes 63 heliostats. The site

3905-407: The mouth. In addition to decreased mean annual flow, the increased river regulation in the Ebro basin has produced daily and seasonal changes in the flow pattern. With regards to the sediment load, several authors conclude that the sediment load was reduced by more than 99 percent during the last century. The drastic reduction in sediment transport implies a sediment deficit in the delta, which

3976-490: The passes at Somport, Envalira, and Puymorens and new routes in the center of the range at Bielsa and Vielha . A notable visual feature of this mountain range is La Brèche de Roland , a gap in the ridge line, which – according to legend – was created by Roland . The metallic ores of the Pyrenees are not in general of much importance now, though there were iron mines at several locations in Andorra , as well as at Vicdessos in Ariège, and

4047-493: The production of power in Spain. The monastery also diverted flow from the Ebro to create a circulating, hydrological central heating system for its buildings. The Ebro in 1938 was the starting ground of one of the most famous Republican offensives of the Spanish Civil War . Known as the Battle of the Ebro , the offensive ended in defeat for the Republican forces, although they enjoyed success in its first stages. They were not able to reach their objective of Gandesa . The Ebro

4118-593: The range is that of the saxifrages , several species of which are endemic here. In their fauna the Pyrenees present some striking instances of endemism . The Pyrenean desman is found only in some of the streams of the northern slopes of these mountains; the only other desman , the Russian desman , is confined to the Volga river basin in southern Russia, Kazakhstan and Ukraine. The Pyrenean brook salamander ( Calotriton asper ), an endemic amphibian, also lives in streams and lakes located at high altitudes. Among other peculiarities of Pyrenean fauna are blind insects in

4189-421: The river basins. This situation has a direct impact on the deltaic system at the mouth of the river because its hydrological dynamics are mainly controlled by the river discharge. The decrease in river discharge has meant introduction of the salt wedge further into the river. The mean annual river flow is approximately the critical flow which determines the formation and the break-up of the salt wedge. Thus, when

4260-432: The river bends southwards and flows through spectacular gorges. The calcareous cliffs and high, rocky hills of the Serra de Cardó almost abut the river separating the Mediterranean coastal strip. After passing the gorges, the Ebro bends again eastwards near Tortosa before discharging in a delta on the Mediterranean Sea close to Amposta in the province of Tarragona . The Ebro Delta (Catalan: Delta de l'Ebre ), in

4331-479: The river discharge is between 300 and 400 m /s (11,000 and 14,000 cu ft/s), the salt wedge can occupy the last 5 km (3 mi) of the estuary, but when the discharge is between 100 and 300 m /s (3,500 and 10,600 cu ft/s), the salt wedge can advance up to 18 km (11 mi) from the mouth. For less than 100 m /s (3,500 cu ft/s), the salt wedge quickly advances to its maximum extent, reaching 32 km (20 mi) from

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4402-405: The river. Nor is it known what the word " Ibēr " or " Hibēr " might mean. In modern Basque the word ibar means 'valley' or 'watered meadow', while ibai means 'river', but there is no proof relating the etymology of the Ebro River with these Basque words. There are rivers in the Balkans called Ibar (Montenegro and Serbia) and Evros (Bulgaria and Greece). In antiquity , the Ebro was used as

4473-429: The same valley, together with the nearby Cirque de Troumouse and Cirque d'Estaubé , are notable examples of the cirque formation. Low passes are lacking, and the principal roads and the railroads between France and Spain run only in the lowlands at the western and eastern ends of the Pyrenees, near sea level. The main passes of note are: Because of the lack of low passes a number of tunnels have been created, beneath

4544-417: The southern slopes of the Pyrenees mountains, which run along the border with France . All of Andorra's drainage basin is in the Ebro, through the Segre . Downstream from Cantabria the climate in the Ebro basin – the valley being isolated from sea air masses by surrounding mountains – becomes Mediterranean/Atlantic influenced and continental . This implies summer/winter seasonal contrast and

4615-465: The surface is organically poor and quick-draining: calcareous, pebbly, stony layers. These are in places salt-rich, seeing some saltwater endorheic lagoons. Karst geological processes shaped the landscape of layers of soluble carbonate rock of extensive limestone bedrock formed in an ancient seabed. The valley expands and the Ebro's flow then becomes slower as its water volume increases, flowing across Aragon. There, larger tributaries flowing from

4686-568: The surface of the earth was also burned and the mountains, because of what had taken place, were called the Pyrenees." The Spanish Pyrenees are part of the following provinces , from east to west: Girona , Barcelona , Lleida (all in Catalonia ), Huesca (in Aragon ), Navarra (in Navarre ). The French Pyrenees are part of the following départements , from east to west: Pyrénées-Orientales (also known as Northern Catalonia ), Aude , Ariège , Haute-Garonne , Hautes-Pyrénées , and Pyrénées-Atlantiques (the latter two of which include

4757-417: The temperatures often drop below 0 °C (32 °F). In some areas the vegetation depends heavily on moisture produced by condensation fog . It is a continental Mediterranean climate with extreme temperatures. There are many ground frosts on clear nights, and sporadic snowfalls . The natural topsoils across the plains are, outside of historically well-forested zones, thin. The subsoil being close to

4828-437: Was chosen because of the length and the quality of sunshine with direct light (more than 2,500 h/year) and the purity of its atmosphere (high altitude and low average humidity). This furnace serves as a science research site studying materials at very high temperatures. Temperatures above 3,500 °C (6,330 °F) can be obtained in a few seconds; in addition, it provides rapid temperature changes and therefore allows studying

4899-418: Was classified as a wetland area of international interest by Spain's Bureau Mar in 1962. Since a phased-introduction law (1983 to 1986) Spain has designated 7,736 hectares (29.87 sq mi) as the Ebro Delta Natural Park (Catalan: Parc Natural del Delta de l'Ebre ) to protect its natural resources. A network of canals and irrigation ditches dug by agricultural and conservation groups help to maintain

4970-430: Was inscribed on the UNESCO World Heritage List for its spectacular geologic landforms and testimony to the unique " transhumance " agricultural system. The Pyrenean region possesses a varied ethnology, folklore and history: see Andorra ; Aragon ; Ariège ; Basque Country ; Béarn ; Catalonia ; Navarre ; Roussillon . For their history, see also Almogavars , Marca Hispanica . The principal languages spoken in

5041-399: Was used to take detailed photographs of the surface of the Moon in preparation for the Apollo missions. Other studies conducted in 1965 provided a detailed analysis of the composition of the atmospheres on Mars and Venus, this served as a basis for Jet Propulsion Laboratory scientists to predict that these planets had no life. Since 1980, the observatory has had a 2-metre telescope, which is

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