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126-458: The Garonne ( / ɡ ə ˈ r ɒ n , ɡ æ ˈ r ɒ n / gə- RON , garr- ON , French: [ɡaʁɔn] ; Catalan , Basque and Occitan : Garona , Occitan pronunciation: [ɡaˈɾunɔ] ; Latin : Garumna or Garunna ) is a river that flows in southwest France and northern Spain . It flows from the central Spanish Pyrenees to the Gironde estuary at
252-455: A Mohs hardness of 2 to 4, dense limestone can have a crushing strength of up to 180 MPa . For comparison, concrete typically has a crushing strength of about 40 MPa. Although limestones show little variability in mineral composition, they show great diversity in texture. However, most limestone consists of sand-sized grains in a carbonate mud matrix. Because limestones are often of biological origin and are usually composed of sediment that
378-463: A bloom of cyanobacteria or microalgae . However, stable isotope ratios in modern carbonate mud appear to be inconsistent with either of these mechanisms, and abrasion of carbonate grains in high-energy environments has been put forward as a third possibility. Formation of limestone has likely been dominated by biological processes throughout the Phanerozoic , the last 540 million years of
504-747: A 2011 study the total number of Catalan speakers was over 9.8 million, with 5.9 million residing in Catalonia. More than half of them spoke Catalan as a second language, with native speakers being about 4.4 million of those (more than 2.8 in Catalonia). Very few Catalan monoglots exist; virtually all of the Catalan speakers in Spain are bilingual speakers of Catalan and Spanish, with 99.7% of Catalan speakers in Catalonia able to speak Spanish and 99.9% able to understand it. In Roussillon , only
630-434: A carbonate rock outcrop can be estimated in the field by etching the surface with dilute hydrochloric acid. This etches away the calcite and aragonite, leaving behind any silica or dolomite grains. The latter can be identified by their rhombohedral shape. Crystals of calcite, quartz , dolomite or barite may line small cavities ( vugs ) in the rock. Vugs are a form of secondary porosity, formed in existing limestone by
756-616: A central quartz grain or carbonate mineral fragment. These likely form by direct precipitation of calcium carbonate onto the ooid. Pisoliths are similar to ooids, but they are larger than 2 mm in diameter and tend to be more irregular in shape. Limestone composed mostly of ooids is called an oolite or sometimes an oolitic limestone . Ooids form in high-energy environments, such as the Bahama platform, and oolites typically show crossbedding and other features associated with deposition in strong currents. Oncoliths resemble ooids but show
882-449: A change in environment that increases the solubility of calcite. Dense, massive limestone is sometimes described as "marble". For example, the famous Portoro "marble" of Italy is actually a dense black limestone. True marble is produced by recrystallization of limestone during regional metamorphism that accompanies the mountain building process ( orogeny ). It is distinguished from dense limestone by its coarse crystalline texture and
1008-949: A composition reflecting the organisms that produced them and the environment in which they were produced. Low-magnesium calcite skeletal grains are typical of articulate brachiopods , planktonic (free-floating) foraminifera, and coccoliths . High-magnesium calcite skeletal grains are typical of benthic (bottom-dwelling) foraminifera, echinoderms , and coralline algae . Aragonite skeletal grains are typical of molluscs , calcareous green algae , stromatoporoids , corals , and tube worms . The skeletal grains also reflect specific geological periods and environments. For example, coral grains are more common in high-energy environments (characterized by strong currents and turbulence) while bryozoan grains are more common in low-energy environments (characterized by quiet water). Ooids (sometimes called ooliths) are sand-sized grains (less than 2mm in diameter) consisting of one or more layers of calcite or aragonite around
1134-412: A considerable fraction of the limestone bed. At depths greater than 1 km (0.62 miles), burial cementation completes the lithification process. Burial cementation does not produce stylolites. When overlying beds are eroded, bringing limestone closer to the surface, the final stage of diagenesis takes place. This produces secondary porosity as some of the cement is dissolved by rainwater infiltrating
1260-424: A denomination based on cultural affinity and common heritage, that has also had a subsequent political interpretation but no official status. Various interpretations of the term may include some or all of these regions. The number of people known to be fluent in Catalan varies depending on the sources used. A 2004 study did not count the total number of speakers, but estimated a total of 9–9.5 million by matching
1386-483: A drop of dilute hydrochloric acid is dropped on it. Dolomite is also soft but reacts only feebly with dilute hydrochloric acid, and it usually weathers to a characteristic dull yellow-brown color due to the presence of ferrous iron. This is released and oxidized as the dolomite weathers. Impurities (such as clay , sand, organic remains, iron oxide , and other materials) will cause limestones to exhibit different colors, especially with weathered surfaces. The makeup of
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#17327646912061512-637: A few million years, as this is the most stable form of calcium carbonate. Ancient carbonate formations of the Precambrian and Paleozoic contain abundant dolomite, but limestone dominates the carbonate beds of the Mesozoic and Cenozoic . Modern dolomite is quite rare. There is evidence that, while the modern ocean favors precipitation of aragonite, the oceans of the Paleozoic and middle to late Cenozoic favored precipitation of calcite. This may indicate
1638-455: A few thousand years. As rainwater mixes with groundwater, aragonite and high-magnesium calcite are converted to low-calcium calcite. Cementing of thick carbonate deposits by rainwater may commence even before the retreat of the sea, as rainwater can infiltrate over 100 km (60 miles) into sediments beneath the continental shelf. As carbonate sediments are increasingly deeply buried under younger sediments, chemical and mechanical compaction of
1764-490: A high percentage of the mineral dolomite , CaMg(CO 3 ) 2 . Magnesian limestone is an obsolete and poorly-defined term used variously for dolomite, for limestone containing significant dolomite ( dolomitic limestone ), or for any other limestone containing a significant percentage of magnesium . Most limestone was formed in shallow marine environments, such as continental shelves or platforms , though smaller amounts were formed in many other environments. Much dolomite
1890-529: A large number of Catalan colonies that today continue to maintain the Catalan language. They also founded many Catalan casals (associations). One classification of Catalan is given by Pèire Bèc : However, the ascription of Catalan to the Occitano-Romance branch of Gallo-Romance languages is not shared by all linguists and philologists, particularly among Spanish ones, such as Ramón Menéndez Pidal . Catalan bears varying degrees of similarity to
2016-521: A length of 6 m (20 ft), weigh up to 400 kg (880 lb) and reach an age of 100 years. Previously found on most coasts of Europe, it has now become so rare that it breeds only in the Garonne river basin in France. Conservation projects are under way to save this fish from extinction via species reintroduction from aquaculture , with the first releases having been made in 1995. Following
2142-435: A limestone sample except in thin section and are less common in ancient limestones, possibly because compaction of carbonate sediments disrupts them. Limeclasts are fragments of existing limestone or partially lithified carbonate sediments. Intraclasts are limeclasts that originate close to where they are deposited in limestone, while extraclasts come from outside the depositional area. Intraclasts include grapestone , which
2268-471: A lower Mg/Ca ratio in the ocean water of those times. This magnesium depletion may be a consequence of more rapid sea floor spreading , which removes magnesium from ocean water. The modern ocean and the ocean of the Mesozoic have been described as "aragonite seas". Most limestone was formed in shallow marine environments, such as continental shelves or platforms . Such environments form only about 5% of
2394-525: A lower diversity of organisms and a greater fraction of silica and clay minerals characteristic of marls . The Green River Formation is an example of a prominent freshwater sedimentary formation containing numerous limestone beds. Freshwater limestone is typically micritic. Fossils of charophyte (stonewort), a form of freshwater green algae, are characteristic of these environments, where the charophytes produce and trap carbonates. Limestones may also form in evaporite depositional environments . Calcite
2520-523: A mechanism for dolomitization, with one 2004 review paper describing it bluntly as "a myth". Ordinary seawater is capable of converting calcite to dolomite, if the seawater is regularly flushed through the rock, as by the ebb and flow of tides (tidal pumping). Once dolomitization begins, it proceeds rapidly, so that there is very little carbonate rock containing mixed calcite and dolomite. Carbonate rock tends to be either almost all calcite/aragonite or almost all dolomite. About 20% to 25% of sedimentary rock
2646-500: A minority of French Catalans speak Catalan nowadays, with French being the majority language for the inhabitants after a continued process of language shift . According to a 2019 survey by the Catalan government, 31.5% of the inhabitants of Catalonia predominantly spoke Catalan at home whereas 52.7% spoke Spanish, 2.8% both Catalan and Spanish and 10.8% other languages. Spanish was the most spoken language in Barcelona (according to
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#17327646912062772-666: A network of community-run schools engaged in Catalan language immersion programs. In Alicante province , Catalan is being replaced by Spanish and in Alghero by Italian . There is also well ingrained diglossia in the Valencian Community , Ibiza , and to a lesser extent, in the rest of the Balearic islands . During the 20th century many Catalans emigrated or went into exile to Venezuela , Mexico , Cuba , Argentina , and other South American countries. They formed
2898-448: A plausible source of mud. Another possibility is direct precipitation from the water. A phenomenon known as whitings occurs in shallow waters, in which white streaks containing dispersed micrite appear on the surface of the water. It is uncertain whether this is freshly precipitated aragonite or simply material stirred up from the bottom, but there is some evidence that whitings are caused by biological precipitation of aragonite as part of
3024-449: A radial rather than layered internal structure, indicating that they were formed by algae in a normal marine environment. Peloids are structureless grains of microcrystalline carbonate likely produced by a variety of processes. Many are thought to be fecal pellets produced by marine organisms. Others may be produced by endolithic (boring) algae or other microorganisms or through breakdown of mollusc shells. They are difficult to see in
3150-1064: A shared history with the Western Romance innovative core, especially Occitan. Like all Romance languages, Catalan has a handful of native words which are unique to it, or rare elsewhere. These include: The Gothic superstrate produced different outcomes in Spanish and Catalan. For example, Catalan fang "mud" and rostir "to roast", of Germanic origin, contrast with Spanish lodo and asar , of Latin origin; whereas Catalan filosa "spinning wheel" and templa "temple", of Latin origin, contrast with Spanish rueca and sien , of Germanic origin. The same happens with Arabic loanwords. Thus, Catalan alfàbia "large earthenware jar" and rajola "tile", of Arabic origin, contrast with Spanish tinaja and teja , of Latin origin; whereas Catalan oli "oil" and oliva "olive", of Latin origin, contrast with Spanish aceite and aceituna . However,
3276-525: A transition from Medieval to Renaissance values, something that can also be seen in Metge 's work. The first book produced with movable type in the Iberian Peninsula was printed in Catalan. With the union of the crowns of Castille and Aragon in 1479, the Spanish kings ruled over different kingdoms, each with its own cultural, linguistic and political particularities, and they had to swear by
3402-560: Is also favored on the seaward margin of shelves and platforms, where there is upwelling deep ocean water rich in nutrients that increase organic productivity. Reefs are common here, but when lacking, ooid shoals are found instead. Finer sediments are deposited close to shore. The lack of deep sea limestones is due in part to rapid subduction of oceanic crust, but is more a result of dissolution of calcium carbonate at depth. The solubility of calcium carbonate increases with pressure and even more with higher concentrations of carbon dioxide, which
3528-482: Is an uncommon mineral in limestone, and siderite or other carbonate minerals are rare. However, the calcite in limestone often contains a few percent of magnesium . Calcite in limestone is divided into low-magnesium and high-magnesium calcite, with the dividing line placed at a composition of 4% magnesium. High-magnesium calcite retains the calcite mineral structure, which is distinct from dolomite. Aragonite does not usually contain significant magnesium. Most limestone
3654-587: Is attested a language name since at least 1652. The word Catalan can be pronounced in English as / ˈ k æ t ə l ə n , - æ n / KAT -ə-lən, -lan or / ˌ k æ t ə ˈ l æ n / KAT -ə- LAN . The endonym is pronounced [kətəˈla] in the Eastern Catalan dialects, and [kataˈla] in the Western dialects. In the Valencian Community and Carche ,
3780-402: Is carbonate rock, and most of this is limestone. Limestone is found in sedimentary sequences as old as 2.7 billion years. However, the compositions of carbonate rocks show an uneven distribution in time in the geologic record. About 95% of modern carbonates are composed of high-magnesium calcite and aragonite. The aragonite needles in carbonate mud are converted to low-magnesium calcite within
3906-474: Is clusters of peloids cemented together by organic material or mineral cement. Extraclasts are uncommon, are usually accompanied by other clastic sediments, and indicate deposition in a tectonically active area or as part of a turbidity current . The grains of most limestones are embedded in a matrix of carbonate mud. This is typically the largest fraction of an ancient carbonate rock. Mud consisting of individual crystals less than 5 μm (0.20 mils) in length
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4032-416: Is commonly white to gray in color. Limestone that is unusually rich in organic matter can be almost black in color, while traces of iron or manganese can give limestone an off-white to yellow to red color. The density of limestone depends on its porosity, which varies from 0.1% for the densest limestone to 40% for chalk. The density correspondingly ranges from 1.5 to 2.7 g/cm . Although relatively soft, with
4158-420: Is controlled largely by the amount of dissolved carbon dioxide ( CO 2 ) in the water. This is summarized in the reaction: Increases in temperature or decreases in pressure tend to reduce the amount of dissolved CO 2 and precipitate CaCO 3 . Reduction in salinity also reduces the solubility of CaCO 3 , by several orders of magnitude for fresh water versus seawater. Near-surface water of
4284-545: Is converted to low-magnesium calcite. Diagenesis is the likely origin of pisoliths , concentrically layered particles ranging from 1 to 10 mm (0.039 to 0.394 inches) in diameter found in some limestones. Pisoliths superficially resemble ooids but have no nucleus of foreign matter, fit together tightly, and show other signs that they formed after the original deposition of the sediments. Silicification occurs early in diagenesis, at low pH and temperature, and contributes to fossil preservation. Silicification takes place through
4410-503: Is deposited close to where it formed, classification of limestone is usually based on its grain type and mud content. Most grains in limestone are skeletal fragments of marine organisms such as coral or foraminifera . These organisms secrete structures made of aragonite or calcite, and leave these structures behind when they die. Other carbonate grains composing limestones are ooids , peloids , and limeclasts ( intraclasts and extraclasts [ ca ] ). Skeletal grains have
4536-460: Is described as coquinite . Chalk is a soft, earthy, fine-textured limestone composed of the tests of planktonic microorganisms such as foraminifera, while marl is an earthy mixture of carbonates and silicate sediments. Limestone forms when calcite or aragonite precipitate out of water containing dissolved calcium, which can take place through both biological and nonbiological processes. The solubility of calcium carbonate ( CaCO 3 )
4662-617: Is described as micrite . In fresh carbonate mud, micrite is mostly small aragonite needles, which may precipitate directly from seawater, be secreted by algae, or be produced by abrasion of carbonate grains in a high-energy environment. This is converted to calcite within a few million years of deposition. Further recrystallization of micrite produces microspar , with grains from 5 to 15 μm (0.20 to 0.59 mils) in diameter. Limestone often contains larger crystals of calcite, ranging in size from 0.02 to 0.1 mm (0.79 to 3.94 mils), that are described as sparry calcite or sparite . Sparite
4788-462: Is distinguished from micrite by a grain size of over 20 μm (0.79 mils) and because sparite stands out under a hand lens or in thin section as white or transparent crystals. Sparite is distinguished from carbonate grains by its lack of internal structure and its characteristic crystal shapes. Geologists are careful to distinguish between sparite deposited as cement and sparite formed by recrystallization of micrite or carbonate grains. Sparite cement
4914-415: Is mandatory in all schools, but it is possible to use Spanish for studying in the public education system of Catalonia in two situations—if the teacher assigned to a class chooses to use Spanish, or during the learning process of one or more recently arrived immigrant students. There is also some intergenerational shift towards Catalan. More recently, several Spanish political forces have tried to increase
5040-464: Is one of the few rivers in the world that exhibit a tidal bore . Surfers and jet skiers could ride the tidal bore at least as far as the village of Cambes , 120 kilometres (75 mi) from the Atlantic, and even further upstream to Cadillac , although the tidal bore appears and disappears in response to changes in the channel bathymetry. In 2010 and 2012, some detailed field studies were conducted in
5166-560: Is one of the first minerals to precipitate in marine evaporites. Most limestone is formed by the activities of living organisms near reefs, but the organisms responsible for reef formation have changed over geologic time. For example, stromatolites are mound-shaped structures in ancient limestones, interpreted as colonies of cyanobacteria that accumulated carbonate sediments, but stromatolites are rare in younger limestones. Organisms precipitate limestone both directly as part of their skeletons, and indirectly by removing carbon dioxide from
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5292-473: Is otherwise chemically fairly pure, with clastic sediments (mainly fine-grained quartz and clay minerals ) making up less than 5% to 10% of the composition. Organic matter typically makes up around 0.2% of a limestone and rarely exceeds 1%. Limestone often contains variable amounts of silica in the form of chert or siliceous skeletal fragments (such as sponge spicules, diatoms , or radiolarians ). Fossils are also common in limestone. Limestone
5418-472: Is produced by decaying organic matter settling into the deep ocean that is not removed by photosynthesis in the dark depths. As a result, there is a fairly sharp transition from water saturated with calcium carbonate to water unsaturated with calcium carbonate, the lysocline , which occurs at the calcite compensation depth of 4,000 to 7,000 m (13,000 to 23,000 feet). Below this depth, foraminifera tests and other skeletal particles rapidly dissolve, and
5544-518: Is secondary dolomite, formed by chemical alteration of limestone. Limestone is exposed over large regions of the Earth's surface, and because limestone is slightly soluble in rainwater, these exposures often are eroded to become karst landscapes. Most cave systems are found in limestone bedrock. Limestone has numerous uses: as a chemical feedstock for the production of lime used for cement (an essential component of concrete ), as aggregate for
5670-547: The Països Catalans or "Catalan Countries". The language evolved from Vulgar Latin in the Middle Ages around the eastern Pyrenees . Nineteenth-century Spain saw a Catalan literary revival , culminating in the early 1900s. The word Catalan is derived from the territorial name of Catalonia , itself of disputed etymology. The main theory suggests that Catalunya ( Latin : Gathia Launia ) derives from
5796-566: The Institut d'Estudis Catalans (IEC). (See also status of Valencian below). By the 9th century, Catalan had evolved from Vulgar Latin on both sides of the eastern end of the Pyrenees , as well as the territories of the Roman province of Hispania Tarraconensis to the south. From the 8th century onwards the Catalan counts extended their territory southwards and westwards at the expense of
5922-660: The Aran Valley in the Spanish Pyrenees , though three different locations have been proposed as the true source: the Uelh deth Garona at Plan de Beret ( 42°42′34″N 0°56′43″E / 42.709494°N 0.945398°E / 42.709494; 0.945398 ), the Ratera-Saboredo cirque 42°36′26″N 0°57′56″E / 42.607295°N 0.965424°E / 42.607295; 0.965424 ), or
6048-943: The Atlantic Ocean ( Bay of Biscay ). Along its course, the Garonne is joined by three other major rivers: the Ariège , the Tarn , and the Lot . Just after Bordeaux, the Garonne meets the Dordogne at the Bec d'Ambès , forming the Gironde estuary, which after approximately 100 kilometres (62 mi) empties into the Atlantic Ocean. Other tributaries include the Save and the Gers . The Garonne
6174-710: The Balearic Islands and the Valencian Community , where it is called Valencian ( valencià ). It has semi-official status in the Italian comune of Alghero , and it is spoken in the Pyrénées-Orientales department of France and in two further areas in eastern Spain: the eastern strip of Aragon and the Carche area in the Region of Murcia . The Catalan-speaking territories are often called
6300-749: The Crown of Aragon , and Catalan was present all over the Mediterranean world. During this period, the Royal Chancery propagated a highly standardized language. Catalan was widely used as an official language in Sicily until the 15th century, and in Sardinia until the 17th. During this period, the language was what Costa Carreras terms "one of the 'great languages' of medieval Europe". Martorell 's novel of chivalry Tirant lo Blanc (1490) shows
6426-467: The Gascon dialect ) is similar to the distance among different Occitan dialects. Catalan was considered a dialect of Occitan until the end of the 19th century and still today remains its closest relative. Catalan shares many traits with the other neighboring Romance languages (Occitan, French, Italian , Sardinian as well as Spanish and Portuguese among others). However, despite being spoken mostly on
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#17327646912066552-485: The Honor Award of Catalan Letters (1969). The first Catalan-language TV show was broadcast in 1964. At the same time, oppression of the Catalan language and identity was carried out in schools, through governmental bodies, and in religious centers. In addition to the loss of prestige for Catalan and its prohibition in schools, migration during the 1950s into Catalonia from other parts of Spain also contributed to
6678-486: The Iberian Peninsula , Catalan has marked differences with the Iberian Romance group ( Spanish and Portuguese ) in terms of pronunciation , grammar, and especially vocabulary; it shows instead its closest affinity with languages native to France and northern Italy, particularly Occitan and to a lesser extent Gallo-Romance ( Franco-Provençal , French , Gallo-Italian ). According to Ethnologue ,
6804-664: The Muslims , bringing their language with them. This process was given definitive impetus with the separation of the County of Barcelona from the Carolingian Empire in 988. In the 11th century, documents written in macaronic Latin begin to show Catalan elements, with texts written almost completely in Romance appearing by 1080. Old Catalan shared many features with Gallo-Romance , diverging from Old Occitan between
6930-514: The consul in Barcelona was also asked. He declared that Catalan "is taught in schools, it is printed and spoken, not only among the lower class, but also among people of first quality, also in social gatherings, as in visits and congresses", indicating that it was spoken everywhere "with the exception of the royal courts". He also indicated that Catalan was spoken "in the Kingdom of Valencia, in
7056-576: The laws of each territory before the respective parliaments . But after the War of the Spanish Succession , Spain became an absolute monarchy under Philip V , which led to the assimilation of the Crown of Aragon by the Crown of Castile through the Nueva Planta decrees , as a first step in the creation of the Spanish nation-state ; as in other contemporary European states, this meant
7182-619: The 11th and 14th centuries. During the 11th and 12th centuries the Catalan rulers expanded southward to the Ebro river , and in the 13th century they conquered the lands that would become the Kingdoms of Valencia and the Majorca . The city of Alghero in Sardinia was repopulated with Catalan speakers in the 14th century. The language also reached Murcia , which became Spanish-speaking in
7308-672: The 15th century. In the Low Middle Ages , Catalan went through a golden age, reaching a peak of maturity and cultural richness. Examples include the work of Majorcan polymath Ramon Llull (1232–1315), the Four Great Chronicles (13th–14th centuries), and the Valencian school of poetry culminating in Ausiàs March (1397–1459). By the 15th century, the city of Valencia had become the sociocultural center of
7434-459: The 19th century saw a Catalan literary revival ( Renaixença ), which has continued up to the present day. This period starts with Aribau 's Ode to the Homeland (1833); followed in the second half of the 19th century, and the early 20th by the work of Verdaguer (poetry), Oller (realist novel), and Guimerà (drama). In the 19th century, the region of Carche , in the province of Murcia
7560-469: The Arabic element is generally much more prevalent in Spanish. Situated between two large linguistic blocks (Iberian Romance and Gallo-Romance), Catalan has many unique lexical choices, such as enyorar "to miss somebody", apaivagar "to calm somebody down", and rebutjar "reject". Traditionally Catalan-speaking territories are sometimes called the Països Catalans (Catalan Countries),
7686-496: The Earth's history. Limestone may have been deposited by microorganisms in the Precambrian , prior to 540 million years ago, but inorganic processes were probably more important and likely took place in an ocean more highly oversaturated in calcium carbonate than the modern ocean. Diagenesis is the process in which sediments are compacted and turned into solid rock . During diagenesis of carbonate sediments, significant chemical and textural changes take place. For example, aragonite
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#17327646912067812-530: The French port of Bordeaux – a length of 529 km (329 mi), of which 47 km (29 mi) is in Spain ( Val d'Aran ); the total length extends to 602 km (374 mi) if one includes the Gironde estuary between the river and the sea. Its basin area is 56,000 km (22,000 sq mi), which increases to 84,811 km (32,746 sq mi) if the Dordogne River , which flows from
7938-547: The Garonne a hydrographic identity number 0 --- 00000 and the generic code O --- 000014,15. A flood of the Garonne in 1930 broke the dike in Thivras (Marmande). In Toulouse, the Garonne has been the cause of many floods, especially since its left bank is inhabited. The earliest records of floods are from around 1177. It is also recorded to have flooded in 1220, 1258, 1430, 1523, 1536 and in 1589, 1608, 1658, 1673, 1675, 1709, 1712, 1727, 1750, 1772, 1788, 1804 and 1810. In 1772,
8064-640: The Garonne in 1835: 7,50 m at Toulouse Pont-Neuf Flood of the Garonne in 1855: 7.25 m at Toulouse Pont-Neuf Flood of the Garonne in 1875: 9,70 m to Toulouse Pont-Neuf (or 8m32 according to vigicrue). Flood of the Garonne in 1879: 4,87 m at Toulouse Pont-Neuf Flood of the Garonne in 1890: 3.30 m at Toulouse Pont-Neuf Flood of the Garonne in 1900: 4,00 m in Toulouse Pont-Neuf Flood of the Garonne in 1905: 4.24 m at Toulouse Pont-Neuf Crete of 1927 in Aquitaine, particularly imposing after
8190-513: The Garonne reached 8 meters 50. In the recent centuries, in 1827, 1835, 1855 and 1856/7. In Toulouse, in 1827, the water level of the Garonne rose four meters above the ordinary level and filled the arches of the Pont de Pierre and Pont Neuf . In 1835, the Garonne rose to five meters above normal and 35 meters above the low water level and flowed through the four arcs of the Pont de Pierre. Flood of
8316-478: The Garonne's Arcins channel between Arcins Island and the right bank close to Lastrene township. A striking feature of the field data sets was the large and rapid fluctuations in turbulent velocities and turbulent stresses during the tidal bore and flood flow. The European sea sturgeon (Acipenser sturio), also known as the Atlantic sturgeon or common sturgeon, is now a Critically Endangered species (IUCN) status [REDACTED] . This species of sturgeon can reach
8442-595: The Spanish province of Alicante settled around Oran , while those from French Catalonia and Menorca migrated to Algiers . By 1911, there were around 100,000 speakers of Patuet , as their speech was called. After the Algerian declaration of independence in 1962, almost all the Pied-Noir Catalan speakers fled to Northern Catalonia or Alicante. The French government only recognizes French as an official language. Nevertheless, on 10 December 2007,
8568-430: The accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite , a closely related rock, which contains
8694-426: The allocation of water volume to agriculture highlights a delicate balance between sustaining local economic activities and the necessity for agricultural adaptation amid decreasing water availability. Catalan language Catalan ( català ) is a Western Romance language . It is the official language of Andorra , and an official language of three autonomous communities in eastern Spain : Catalonia ,
8820-434: The base of roads, as white pigment or filler in products such as toothpaste or paint, as a soil conditioner , and as a popular decorative addition to rock gardens . Limestone formations contain about 30% of the world's petroleum reservoirs . Limestone is composed mostly of the minerals calcite and aragonite , which are different crystal forms of calcium carbonate ( CaCO 3 ). Dolomite , CaMg(CO 3 ) 2 ,
8946-596: The basin confronts a demographic challenge. The study aims to inform stakeholders and devise an adaptation strategy within the local master plan of water management and development (SDAGE), considering the impact of the predicted demographic shifts. Central to the "Garonne 2050" study is its examination of the Garonne River basin's agricultural sector. Detailed insights into changes in irrigated agricultural areas, crop rotation, and farm numbers are essential for informing effective water management strategies. Notably,
9072-459: The bed of the main upper Garonne valley . The river runs for another 38 kilometres (24 mi) to the French border at Pont de Rei , 40.5 kilometres (25.2 mi) in total. The Ratera-Saboredo cirque is the head of the upper Garonne valley, and its upper lake at 2,600 metres (8,500 ft) above sea level is the origin of the Ruda-Garona river, running for 16 kilometres (9.9 mi) to
9198-657: The beds. This may include the formation of vugs , which are crystal-lined cavities within the limestone. Diagenesis may include conversion of limestone to dolomite by magnesium-rich fluids. There is considerable evidence of replacement of limestone by dolomite, including sharp replacement boundaries that cut across bedding. The process of dolomitization remains an area of active research, but possible mechanisms include exposure to concentrated brines in hot environments ( evaporative reflux ) or exposure to diluted seawater in delta or estuary environments ( Dorag dolomitization ). However, Dorag dolomitization has fallen into disfavor as
9324-457: The confluence of the Garonne with the Lot (of which it remained raw reference), insignificant upstream18. Flood of the Garonne in 1952: 4,57 m at Toulouse Pont-Neuf Flood of the Garonne in 1977: 4,31 m in Toulouse Pont-Neuf Flood of the Garonne in 2000: 4.38 m at Toulouse Pont-Neuf Flood of the Garonne in 2004: 3,52 m at Toulouse Pont-Neuf In 1777, the Garonne suffered an extraordinary flood to
9450-466: The confluence with the Beret-Garona brook and another 38 kilometres (24 mi) to the French border at Pont del Rei , 54 kilometres (34 mi) in total. At the confluence, the Ruda-Garona carries 2.6 cubic metres per second (92 cu ft/s) of water. The Ratera-Saboredo cirque is considered by many researchers to be the origin of the Garonne. The third theory holds that the river rises on
9576-466: The depositional fabric of carbonate rocks. Dunham divides the rocks into four main groups based on relative proportions of coarser clastic particles, based on criteria such as whether the grains were originally in mutual contact, and therefore self-supporting, or whether the rock is characterized by the presence of frame builders and algal mats. Unlike the Folk scheme, Dunham deals with the original porosity of
9702-469: The deposits are highly porous, so that they have a spongelike texture, they are typically described as tufa . Secondary calcite deposited by supersaturated meteoric waters ( groundwater ) in caves is also sometimes described as travertine. This produces speleothems , such as stalagmites and stalactites . Coquina is a poorly consolidated limestone composed of abraded pieces of coral , shells , or other fossil debris. When better consolidated, it
9828-419: The diminished use of the language. These migrants were often unaware of the existence of Catalan, and thus felt no need to learn or use it. Catalonia was the economic powerhouse of Spain, so these migrations continued to occur from all corners of the country. Employment opportunities were reduced for those who were not bilingual . Daily newspapers remained exclusively in Spanish until after Franco's death, when
9954-406: The earth's oceans are oversaturated with CaCO 3 by a factor of more than six. The failure of CaCO 3 to rapidly precipitate out of these waters is likely due to interference by dissolved magnesium ions with nucleation of calcite crystals, the necessary first step in precipitation. Precipitation of aragonite may be suppressed by the presence of naturally occurring organic phosphates in
10080-601: The east and joins the Garonne at Bec d'Ambès to form the Gironde estuary, is included. Umayyad and Aquitanian forces fought the Battle of the River Garonne in 732 beside the river near present-day Bordeaux. The name derives from Garumna , a Latinized version of the Aquitanian name meaning "stony river" ("kar" relating to "stone" and "-ona" relating to "river"). The Garonne's headwaters are to be found in
10206-562: The first one in Catalan since the end of the Civil War, Avui , began to be published in 1976. Since the Spanish transition to democracy (1975–1982), Catalan has been institutionalized as an official language, language of education, and language of mass media; all of which have contributed to its increased prestige. In Catalonia , there is an unparalleled large bilingual European non-state linguistic community. The teaching of Catalan
10332-399: The first refers to the grains and the second to the cement. For example, a limestone consisting mainly of ooids, with a crystalline matrix, would be termed an oosparite. It is helpful to have a petrographic microscope when using the Folk scheme, because it is easier to determine the components present in each sample. Robert J. Dunham published his system for limestone in 1962. It focuses on
10458-619: The flow of the river, from source to mouth: The Garonne plays an important role in inland shipping. The river not only allows seagoing vessels to reach the port of Bordeaux but also forms part of the Canal des Deux Mers , linking the Mediterranean Sea and the Atlantic Ocean . From the ocean, ships pass through the Gironde estuary up to the mouth of the Garonne (to the right of the Dordogne when sailing upstream). Ships continue on
10584-572: The formation of distinctive minerals from the silica and clay present in the original limestone. Two major classification schemes, the Folk and Dunham, are used for identifying the types of carbonate rocks collectively known as limestone. Robert L. Folk developed a classification system that places primary emphasis on the detailed composition of grains and interstitial material in carbonate rocks . Based on composition, there are three main components: allochems (grains), matrix (mostly micrite), and cement (sparite). The Folk system uses two-part names;
10710-429: The geologic record are called bioherms . Many are rich in fossils, but most lack any connected organic framework like that seen in modern reefs. The fossil remains are present as separate fragments embedded in ample mud matrix. Much of the sedimentation shows indications of occurring in the intertidal or supratidal zones, suggesting sediments rapidly fill available accommodation space in the shelf or platform. Deposition
10836-477: The imposition of the political and cultural characteristics of the dominant groups. Since the political unification of 1714, Spanish assimilation policies towards national minorities have been a constant. The process of assimilation began with secret instructions to the corregidores of the Catalan territory: they "will take the utmost care to introduce the Castilian language, for which purpose he will give
10962-476: The islands of Mallorca, Menorca, Ibiza, Sardinia, Corsica and much of Sicily, in the Vall d "Aran and Cerdaña". The defeat of the pro-Habsburg coalition in the War of Spanish Succession (1714) initiated a series of laws which, among other centralizing measures, imposed the use of Spanish in legal documentation all over Spain. Because of this, use of the Catalan language declined into the 18th century. However,
11088-678: The lack of universal agreement on definition for determining a stream's source , the United States Geological Survey , the National Geographic Society and the Smithsonian Institution agree that a stream's source should be considered as the most distant point (along watercourses from the river mouth ) in the drainage basin from which water runs. The Ratera-Saboredo cirque is the "most distant point (along watercourses from
11214-606: The language in features closer to Occitan (and French ). There is evidence that, at least from the 2nd century AD, the vocabulary and phonology of Roman Tarraconensis was different from the rest of Roman Hispania. Differentiation arose generally because Spanish, Asturian , and Galician-Portuguese share certain peripheral archaisms (Spanish hervir , Asturian and Portuguese ferver vs. Catalan bullir , Occitan bolir "to boil") and innovatory regionalisms (Spanish novillo , Asturian nuviellu vs. Catalan torell , Occitan taurèl "bullock"), while Catalan has
11340-622: The lexical similarity between Catalan and other Romance languages is: 87% with Italian; 85% with Portuguese and Spanish; 76% with Ladin and Romansh ; 75% with Sardinian; and 73% with Romanian. During much of its history, and especially during the Francoist dictatorship (1939–1975), the Catalan language was ridiculed as a mere dialect of Spanish . This view, based on political and ideological considerations, has no linguistic validity. Spanish and Catalan have important differences in their sound systems, lexicon, and grammatical features, placing
11466-486: The linguistic census held by the Government of Catalonia in 2013) and it is understood almost universally. According to 2013 census, Catalan was also very commonly spoken in the city of 1,501,262: it was understood by 95% of the population, while 72.3% over the age of two could speak it (1,137,816), 79% could read it (1,246.555), and 53% could write it (835,080). The share of Barcelona residents who could speak it (72.3%)
11592-461: The linguistic varieties subsumed under the cover term Occitan language (see also differences between Occitan and Catalan and Gallo-Romance languages ). Thus, as it should be expected from closely related languages, Catalan today shares many traits with other Romance languages. Some include Catalan in Occitan, as the linguistic distance between this language and some Occitan dialects (such as
11718-489: The most temperate and disguised measures so that the effect is achieved, without the care being noticed". From there, actions in the service of assimilation, discreet or aggressive, were continued, and reached to the last detail, such as, in 1799, the Royal Certificate forbidding anyone to "represent, sing and dance pieces that were not in Spanish". The use of Spanish gradually became more prestigious and marked
11844-527: The name Gothia or Gauthia ('Land of the Goths '), since the origins of the Catalan counts, lords and people were found in the March of Gothia , whence Gothland > Gothlandia > Gothalania > Catalonia theoretically derived. In English, the term referring to a person first appears in the mid 14th century as Catelaner , followed in the 15th century as Catellain (from Middle French ). It
11970-410: The ocean basins, but limestone is rarely preserved in continental slope and deep sea environments. The best environments for deposition are warm waters, which have both a high organic productivity and increased saturation of calcium carbonate due to lower concentrations of dissolved carbon dioxide. Modern limestone deposits are almost always in areas with very little silica-rich sedimentation, reflected in
12096-507: The other hand, there are several language shift processes currently taking place. In the Northern Catalonia area of France, Catalan has followed the same trend as the other minority languages of France, with most of its native speakers being 60 or older (as of 2004). Catalan is studied as a foreign language by 30% of the primary education students, and by 15% of the secondary. The cultural association La Bressola promotes
12222-492: The other side of the mountain. From Aigualluts to the confluence with the main river at the bed of the upper Garonne valley at 800 metres (2,600 ft) above sea level, the Joèu has run for 12.4 kilometres (7.7 mi) (16 kilometres more to get to the French border), carrying 2.16 cubic metres per second (76 cu ft/s) of water, whilst the main river is carrying 17.7 cubic metres per second (630 cu ft/s). Despite
12348-528: The percentage of speakers to the population of each area where Catalan is spoken. The web site of the Generalitat de Catalunya estimated that as of 2004 there were 9,118,882 speakers of Catalan. These figures only reflect potential speakers; today it is the native language of only 35.6% of the Catalan population. According to Ethnologue , Catalan had 4.1 million native speakers and 5.1 million second-language speakers in 2021. According to
12474-497: The point that the priest of Bourdelles took the trouble to retranscribe the event, at the end of the acts of the year, in the parish register of baptisms, marriages and deaths. The "Garonne 2050" project, initiated by the Adour-Garonne water agency in 2010, aims to address the future challenges facing the Garonne River basin regarding its water resources. With an anticipated surge of an additional 1 million inhabitants by 2050,
12600-460: The population self-identifies with both Catalan and Spanish equally, 36.4% with Catalan and 47.5% only Spanish. In 2003 the same studies concluded no language preference for self-identification within the population above 15 years old: 5% self-identified with both languages, 44.3% with Catalan and 47.5% with Spanish. To promote use of Catalan, the Generalitat de Catalunya (Catalonia's official Autonomous government) spends part of its annual budget on
12726-404: The promotion of the use of Catalan in Catalonia and in other territories, with entities such as Consorci per a la Normalització Lingüística (Consortium for Linguistic Normalization). In Andorra , Catalan has always been the sole official language. Since the promulgation of the 1993 constitution , several policies favoring Catalan have been enforced, such as Catalan medium education. On
12852-426: The reaction: Fossils are often preserved in exquisite detail as chert. Cementing takes place rapidly in carbonate sediments, typically within less than a million years of deposition. Some cementing occurs while the sediments are still under water, forming hardgrounds . Cementing accelerates after the retreat of the sea from the depositional environment, as rainwater infiltrates the sediment beds, often within just
12978-482: The relative purity of most limestones. Reef organisms are destroyed by muddy, brackish river water, and carbonate grains are ground down by much harder silicate grains. Unlike clastic sedimentary rock, limestone is produced almost entirely from sediments originating at or near the place of deposition. Limestone formations tend to show abrupt changes in thickness. Large moundlike features in a limestone formation are interpreted as ancient reefs , which when they appear in
13104-612: The rest of the territories. (% of the population 15 years old and older). (% of the population 15 years old and older). Limestone Limestone ( calcium carbonate CaCO 3 ) is a type of carbonate sedimentary rock which is the main source of the material lime . It is composed mostly of the minerals calcite and aragonite , which are different crystal forms of CaCO 3 . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as
13230-412: The river is no longer considered navigable . Instead the lateral canal takes boats through 53 locks to the town of Toulouse, where the canal meets the Canal du Midi . The upstream part of the river, upstream from Toulouse depends primarily on snow and snow melt. The lower/downstream part is rain fed as well as its main tributaries. The Garonne also feeds several channels/canals: SANDRE assigns to
13356-732: The river mouth) in the drainage basin from which water runs" and the source of the Garonne, according to the United States Geological Survey, the National Geographic Society and the Smithsonian Institution convention on determining a stream's source. The Garonne follows the Aran Valley northwards into France, flowing via Toulouse and Agen towards Bordeaux , where it meets the Gironde estuary . The Gironde flows into
13482-460: The rock. The Dunham scheme is more useful for hand samples because it is based on texture, not the grains in the sample. A revised classification was proposed by Wright (1992). It adds some diagenetic patterns to the classification scheme. Travertine is a term applied to calcium carbonate deposits formed in freshwater environments, particularly waterfalls , cascades and hot springs . Such deposits are typically massive, dense, and banded. When
13608-479: The sediments increases. Chemical compaction takes place by pressure solution of the sediments. This process dissolves minerals from points of contact between grains and redeposits it in pore space, reducing the porosity of the limestone from an initial high value of 40% to 80% to less than 10%. Pressure solution produces distinctive stylolites , irregular surfaces within the limestone at which silica-rich sediments accumulate. These may reflect dissolution and loss of
13734-662: The sediments of the ocean floor abruptly transition from carbonate ooze rich in foraminifera and coccolith remains ( Globigerina ooze) to silicic mud lacking carbonates. In rare cases, turbidites or other silica-rich sediments bury and preserve benthic (deep ocean) carbonate deposits. Ancient benthic limestones are microcrystalline and are identified by their tectonic setting. Fossils typically are foraminifera and coccoliths. No pre-Jurassic benthic limestones are known, probably because carbonate-shelled plankton had not yet evolved. Limestones also form in freshwater environments. These limestones are not unlike marine limestone, but have
13860-477: The slopes of Pic Aneto (Salterillo-Barrancs ravine 42°38′59″N 0°40′06″E / 42.6498°N 0.6683°E / 42.6498; 0.6683 according to the season). The Uelh deth Garona at 1,862 metres (6,109 ft) above sea level has been traditionally considered as the source of the Garonne. From this point a brook (called the Beret-Garona ) runs for 2.5 kilometres (1.6 mi) to
13986-638: The slopes of Pic Aneto at 2,300 metres (7,500 ft) above sea level and flows by way of a sinkhole known as the Forau de Aigualluts ( 42°40′00″N 0°40′01″E / 42.6666°N 0.6669°E / 42.6666; 0.6669 ) through the limestone of the Tuca Blanca de Pomèro and a resurgence in the Val dera Artiga above the Aran Valley in the Spanish Pyrenees. This underground route
14112-569: The social level, including in schools and the University of Barcelona . The Catalan language and culture were still vibrant during the Spanish Civil War (1936–1939), but were crushed at an unprecedented level throughout the subsequent decades due to Francoist dictatorship (1939–1975), which abolished the official status of Catalan and imposed the use of Spanish in schools and in public administration in all of Spain , while banning
14238-560: The sole official language of the region. Shortly after the French Revolution (1789), the French First Republic prohibited official use of, and enacted discriminating policies against, the regional languages of France, such as Catalan, Alsatian , Breton , Occitan , Flemish , and Basque . After the French colony of Algeria was established in 1830, many Catalan-speaking settlers moved there. People from
14364-521: The start of the decline of Catalan. Starting in the 16th century, Catalan literature came under the influence of Spanish, and the nobles, part of the urban and literary classes became bilingual . With the Treaty of the Pyrenees (1659), Spain ceded the northern part of Catalonia to France , and soon thereafter the local Catalan varieties came under the influence of French , which in 1700 became
14490-569: The term valencià [valensiˈa] is frequently used instead. Thus, the name "Valencian", although often employed for referring to the varieties specific to the Valencian Community and Carche, is also used by Valencians as a name for the language as a whole, synonymous with "Catalan". Both uses of the term have their respective entries in the dictionaries by the Acadèmia Valenciana de la Llengua (AVL) and
14616-865: The then General Council of the Pyrénées-Orientales officially recognized Catalan as one of the départment's languages and seeks to further promote it in public life and education. In 1807, the Statistics Office of the French Ministry of the Interior asked the prefects for an official survey on the limits of the French language . The survey found that in Roussillon , almost only Catalan was spoken, and since Napoleon wanted to incorporate Catalonia into France, as happened in 1812,
14742-514: The tidal river Garonne up to the Pont de Pierre (stone bridge) in Bordeaux. Inland vessels continue upstream to Castets-en-Dorthe , where the Canal de Garonne joins the river. Prior to the building of the Canal lateral à la Garonne, between 1838 and 1856, shallow-draught boats used the Garonne itself as far as Toulouse . However, navigation on the upper river was very uncertain, and this stretch of
14868-403: The use of Catalan in them. Between 1939 and 1943 newspapers and book printing in Catalan almost disappeared. Francisco Franco's desire for a homogeneous Spanish population resonated with some Catalans in favor of his regime, primarily members of the upper class, who began to reject the use of Catalan. Despite all of these hardships, Catalan continued to be used privately within households, and it
14994-609: The use of Spanish in the Catalan educational system. As a result, in May 2022 the Spanish Supreme Court urged the Catalan regional government to enforce a measure by which 25% of all lessons must be taught in Spanish. According to the Statistical Institute of Catalonia , in 2013 the Catalan language is the second most commonly used in Catalonia, after Spanish , as a native or self-defining language: 7% of
15120-533: The water by photosynthesis and thereby decreasing the solubility of calcium carbonate. Limestone shows the same range of sedimentary structures found in other sedimentary rocks. However, finer structures, such as lamination , are often destroyed by the burrowing activities of organisms ( bioturbation ). Fine lamination is characteristic of limestone formed in playa lakes , which lack the burrowing organisms. Limestones also show distinctive features such as geopetal structures , which form when curved shells settle to
15246-553: The water. Although ooids likely form through purely inorganic processes, the bulk of CaCO 3 precipitation in the oceans is the result of biological activity. Much of this takes place on carbonate platforms . The origin of carbonate mud, and the processes by which it is converted to micrite, continue to be a subject of research. Modern carbonate mud is composed mostly of aragonite needles around 5 μm (0.20 mils) in length. Needles of this shape and composition are produced by calcareous algae such as Penicillus , making this
15372-498: Was able to survive Franco's dictatorship. At the end of World War II , however, some of the harsh measures began to be lifted and, while Spanish language remained the sole promoted one, limited number of Catalan literature began to be tolerated. Several prominent Catalan authors resisted the suppression through literature. Private initiative contests were created to reward works in Catalan, among them Joan Martorell prize (1947), Víctor Català prize (1953) Carles Riba award (1950), or
15498-416: Was likely deposited in pore space between grains, suggesting a high-energy depositional environment that removed carbonate mud. Recrystallized sparite is not diagnostic of depositional environment. Limestone outcrops are recognized in the field by their softness (calcite and aragonite both have a Mohs hardness of less than 4, well below common silicate minerals) and because limestone bubbles vigorously when
15624-640: Was lower than that of the overall Catalan population, of whom 81.2% over the age of 15 spoke the language. Knowledge of Catalan has increased significantly in recent decades thanks to a language immersion educational system. An important social characteristic of the Catalan language is that all the areas where it is spoken are bilingual in practice: together with French in Roussillon, with Italian in Alghero, with Spanish and French in Andorra, and with Spanish in
15750-590: Was repopulated with Valencian speakers. Catalan spelling was standardized in 1913 and the language became official during the Second Spanish Republic (1931–1939). The Second Spanish Republic saw a brief period of tolerance, with most restrictions against Catalan lifted. The Generalitat (the autonomous government of Catalonia, established during the Republic in 1931) made a normal use of Catalan in its administration and put efforts to promote it at
15876-472: Was suggested by the geologist Ramond de Carbonnières in 1787 but there was no confirmation until 1931, when caver Norbert Casteret poured fluorescein dye into the flow and noted its emergence a few hours later 4 kilometres (2.5 mi) away at Uelhs deth Joèu ("Jove's eyes" 42°40′51″N 0°42′28″E / 42.68092°N 0.7077°E / 42.68092; 0.7077 ) in the Artiga de Lin on
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