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139-652: Glendalough ( / ˌ ɡ l ɛ n d ə ˈ l ɒ x / ; Irish : Gleann Dá Loch , meaning 'valley of two lakes') is a glacial valley in County Wicklow , Ireland , renowned for an Early Medieval monastic settlement founded in the 6th century by St Kevin . From 1825 to 1957, the head of the Glendalough Valley was the site of a galena lead mine. Glendalough is also a recreational area for picnics, for walking along networks of maintained trails of varying difficulty, and also for rock climbing. Kevin,

278-532: A climbing hut since the 1950s. Below the crag is an extensive boulder field which is also used for bouldering activities. Irish language Irish ( Standard Irish : Gaeilge ), also known as Irish Gaelic or simply Gaelic ( / ˈ ɡ eɪ l ɪ k / GAY -lik ), is a Celtic language of the Indo-European language family . It is a member of the Goidelic language group of

417-420: A completely crystalline rock. Granitic rocks mainly consist of feldspar , quartz , mica , and amphibole minerals , which form an interlocking, somewhat equigranular matrix of feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende ) peppering the lighter color minerals. Occasionally some individual crystals ( phenocrysts ) are larger than the groundmass , in which case

556-434: A delta , which eventually divided the original lake in two. Surrounding Glendalough are the mountains of Camaderry 699 metres (2,293 ft), the hydroelectric station at Turlough Hill 681 metres (2,234 ft), and large massif of Conavalla 734 metres (2,408 ft) which dominates the head of the valley, and the peaks of Lugduff 652 metres (2,139 ft), and Mullacor 661 metres (2,169 ft). Glendalough

695-591: A long distance waymarked walking trail , also passes through Glendalough. The 30-kilometre medieval pilgrimage tail, Saint Kevin's Way , starts in Hollywood , and ends in Glendalough. Glendalough's south-facing granite cliffs, situated on slopes of Camaderry above the north-western end of the valley (just above the Miner's Village), have been a rock climbing location since 1948. The north-facing cliffs on

834-422: A timber roof. Inside the gateway, in the west wall, is a cross-inscribed stone. This denoted sanctuary , the boundary of the area of refuge. The paving of the causeway in the monastic city is still preserved in part but very little remains of the enclosure wall. This fine tower, built of mica-slate interspersed with granite is about 30 metres high, with an entrance 3.5 metres from the base. The conical roof

973-547: A unique dialect of Irish developed before falling out of use in the early 20th century. With a writing system , Ogham , dating back to at least the 4th century AD, which was gradually replaced by Latin script since the 5th century AD, Irish has one of the oldest vernacular literatures in Western Europe . On the island, the language has three major dialects: Connacht , Munster and Ulster Irish . All three have distinctions in their speech and orthography . There

1112-462: A 1779 sketch made by Beranger, the Priests' House is a small Romanesque building, with a decorative arch at the east end. It gets its name from the practice of interring priests there in the 18th and 19th centuries. Its original purpose is unknown although it may have been used to house relics of St. Kevin . This stone-roofed building originally had a nave only, with an entrance at the west end and

1251-717: A bargaining chip during government formation in Northern Ireland, prompting protests from organisations and groups such as An Dream Dearg . Irish became an official language of the EU on 1 January 2007, meaning that MEPs with Irish fluency can now speak the language in the European Parliament and at committees, although in the case of the latter they have to give prior notice to a simultaneous interpreter in order to ensure that what they say can be interpreted into other languages. While an official language of

1390-563: A basaltic magma to a granitic magma, but the quantities produced are small. For example, granitic rock makes up just 4% of the exposures in the South Sandwich Islands . In continental arc settings, granitic rocks are the most common plutonic rocks, and batholiths composed of these rock types extend the entire length of the arc. There are no indication of magma chambers where basaltic magmas differentiate into granites, or of cumulates produced by mafic crystals settling out of

1529-575: A better future for Ireland and all her citizens." The Strategy was produced on 21 December 2010 and will stay in action until 2030; it aims to target language vitality and revitalization of the Irish language. The 30-page document published by the Government of Ireland details the objectives it plans to work towards in an attempt to preserve and promote both the Irish language and the Gaeltacht. It

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1668-633: A church of local importance and a place of pilgrimage . Glendalough is on the 1598 map "A Modern Depiction of Ireland, One of the British Isles" by Abraham Ortelius as "Glandalag". Descriptions of Glendalough from the 18th and 19th centuries include references to occasions of "riotous assembly" on the feast of St. Kevin on 3 June. The present remains in Glendalough tell only a small part of its story. The monastery in its heyday included workshops, areas for manuscript writing and copying, guest houses, an infirmary, farm buildings and dwellings for both

1807-478: A cultural and social force. Irish speakers often insisted on using the language in law courts (even when they knew English), and Irish was also common in commercial transactions. The language was heavily implicated in the "devotional revolution" which marked the standardisation of Catholic religious practice and was also widely used in a political context. Down to the time of the Great Famine and even afterwards,

1946-553: A degree course in the NUI federal system to pass the subject of Irish in the Leaving Certificate or GCE / GCSE examinations. Exemptions are made from this requirement for students who were born or completed primary education outside of Ireland, and students diagnosed with dyslexia . NUI Galway is required to appoint people who are competent in the Irish language, as long as they are also competent in all other aspects of

2085-526: A descendant of one of the ruling families in Leinster , studied as a boy under the care of three holy men: Eoghan , Lochan and Eanna. During this time, he went to Glendalough. He was to return later, with a small group of monks to found a monastery where the 'two rivers form a confluence'. Kevin's writings discuss his fighting "knights" at Glendalough; scholars today believe this refers to his process of self-examination and his personal temptations. His fame as

2224-520: A diapir it would expend far too much energy in heating wall rocks, thus cooling and solidifying before reaching higher levels within the crust. Fracture propagation is the mechanism preferred by many geologists as it largely eliminates the major problems of moving a huge mass of magma through cold brittle crust. Magma rises instead in small channels along self-propagating dykes which form along new or pre-existing fracture or fault systems and networks of active shear zones. As these narrow conduits open,

2363-517: A few (known as leucogranites ) contain almost no dark minerals. Granite is nearly always massive (lacking any internal structures), hard (falling between 6 and 7 on the Mohs hardness scale) , and tough. These properties have made granite a widespread construction stone throughout human history. The word "granite" comes from the Latin granum , a grain, in reference to the coarse-grained structure of such

2502-460: A fully recognised EU language for the first time in the state's history. Before Irish became an official language it was afforded the status of treaty language and only the highest-level documents of the EU were made available in Irish. The Irish language was carried abroad in the modern period by a vast diaspora , chiefly to Great Britain and North America, but also to Australia , New Zealand and Argentina . The first large movements began in

2641-610: A granite that is derived from partial melting of metasedimentary rocks may have more alkali feldspar, whereas a granite derived from partial melting of metaigneous rocks may be richer in plagioclase. It is on this basis that the modern "alphabet" classification schemes are based. The letter-based Chappell & White classification system was proposed initially to divide granites into I-type (igneous source) granite and S-type (sedimentary sources). Both types are produced by partial melting of crustal rocks, either metaigneous rocks or metasedimentary rocks. I-type granites are characterized by

2780-471: A grove of trees, this nave-and-chancel church dates from around 1100. Most of the surrounding walls are modern. The name derives from Righ Fearta , the burial place of the kings. The church, built in a simple style, has a granite doorway with sloping jambs and flat lintel and a granite chancel arch. The projecting corbels at each gable carried verge timbers for the roof. East of the church there are two crosses of note, one with an elaborate interlace pattern. On

2919-565: A high content of sodium and calcium, and by a strontium isotope ratio, Sr/ Sr, of less than 0.708. Sr is produced by radioactive decay of Rb, and since rubidium is concentrated in the crust relative to the mantle, a low ratio suggests origin in the mantle. The elevated sodium and calcium favor crystallization of hornblende rather than biotite. I-type granites are known for their porphyry copper deposits. I-type granites are orogenic (associated with mountain building) and usually metaluminous. S-type granites are sodium-poor and aluminum-rich. As

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3058-464: A holy man spread and he attracted numerous followers. He died in about 618 , traditionally on 3 June. For the next six centuries, Glendalough flourished and the Irish Annals contain references to the deaths of abbots and raids on the settlement. Circa 1042, oak timber from Glendalough was used to build the second-longest Viking longship recorded (circa 30 m). A modern replica of that ship

3197-824: A much higher proportion of clay with the Cecil soil series a prime example of the consequent Ultisol great soil group. Granite is a natural source of radiation , like most natural stones. Potassium-40 is a radioactive isotope of weak emission, and a constituent of alkali feldspar , which in turn is a common component of granitic rocks, more abundant in alkali feldspar granite and syenites . Some granites contain around 10 to 20 parts per million (ppm) of uranium . By contrast, more mafic rocks, such as tonalite, gabbro and diorite , have 1 to 5 ppm uranium, and limestones and sedimentary rocks usually have equally low amounts. Many large granite plutons are sources for palaeochannel -hosted or roll front uranium ore deposits , where

3336-585: A paper suggested that within a generation, non-Gaeltacht habitual users of Irish might typically be members of an urban, middle class, and highly educated minority. Parliamentary legislation is supposed to be available in both Irish and English but is frequently only available in English. This is notwithstanding that Article 25.4 of the Constitution of Ireland requires that an "official translation" of any law in one official language be provided immediately in

3475-575: A pass in Leaving Certificate Irish or English, and receive lessons in Irish during their two years of training. Official documents of the Irish government must be published in both Irish and English or Irish alone (in accordance with the Official Languages Act 2003, enforced by An Coimisinéir Teanga , the Irish language ombudsman). The National University of Ireland requires all students wishing to embark on

3614-536: A peculiar mineralogy and geochemistry, with particularly high silicon and potassium at the expense of calcium and magnesium and a high content of high field strength cations (cations with a small radius and high electrical charge, such as zirconium , niobium , tantalum , and rare earth elements .) They are not orogenic, forming instead over hot spots and continental rifting, and are metaluminous to mildly peralkaline and iron-rich. These granites are produced by partial melting of refractory lithology such as granulites in

3753-568: A range of hills, formed by the metamorphic aureole or hornfels . Granite often occurs as relatively small, less than 100 km stock masses ( stocks ) and in batholiths that are often associated with orogenic mountain ranges. Small dikes of granitic composition called aplites are often associated with the margins of granitic intrusions . In some locations, very coarse-grained pegmatite masses occur with granite. Granite forms from silica-rich ( felsic ) magmas. Felsic magmas are thought to form by addition of heat or water vapor to rock of

3892-625: A religious context. An Irish translation of the Old Testament by Leinsterman Muircheartach Ó Cíonga , commissioned by Bishop Bedell , was published after 1685 along with a translation of the New Testament. Otherwise, Anglicisation was seen as synonymous with 'civilising' the native Irish. Currently, modern day Irish speakers in the church are pushing for language revival. It has been estimated that there were around 800,000 monoglot Irish speakers in 1800, which dropped to 320,000 by

4031-415: A result, they contain micas such as biotite and muscovite instead of hornblende. Their strontium isotope ratio is typically greater than 0.708, suggesting a crustal origin. They also commonly contain xenoliths of metamorphosed sedimentary rock, and host tin ores. Their magmas are water-rich, and they readily solidify as the water outgasses from the magma at lower pressure, so they less commonly make it to

4170-465: A series of tunnels called adits , which are now mostly flooded, through the Camaderry mountain. These tunnels helped drain the mineral vein and made it easier to transport ore to Glendalough where it could be more easily processed. The rusted remains of ore crushers can still be seen at the Miner's Village, however, the tramway and inclined rails system are gone. In 1809, Thomas Weaver established

4309-412: A small round-headed window in the east gable. The upper part of the window can be seen above what became the chancel arch when the chancel (now missing) and the sacristy were added later. The steep roof, formed of overlapping stones, is supported internally by a semi-circular vault. Access to the croft or roof chamber was through a rectangular opening towards the western end of the vault. The church also had

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4448-413: A timber first floor. The belfry with its conical cap and four small windows rises from the west end of the stone roof in the form of a miniature round tower. It is commonly known as St. Kevin's Kitchen as the bell tower resembles a kitchen chimney. However, food was not cooked here. The remains of this nave-and-chancel church were uncovered in 1875. The church is currently thought to commemorate St. Ciarán,

4587-474: A very tight fit when crouched together in it". This stone-walled circular enclosure on the level ground between the two lakes is 20 metres in diameter and is of unknown date. Close by, are several crosses, apparently used as stations on the pilgrim's route. This small rectangular church on the southern shore of the Upper Lake is accessible only by boat, via a series of steps from the landing stage. West of

4726-545: A wider meaning, including the Gaelic of Scotland and the Isle of Man , as well as of Ireland. When required by the context, these are distinguished as Gaeilge na hAlban , Gaeilge Mhanann and Gaeilge na hÉireann respectively. In English (including Hiberno-English ), the language is usually referred to as Irish , as well as Gaelic and Irish Gaelic . The term Irish Gaelic may be seen when English speakers discuss

4865-623: A zig-zag path in 2020 from the Poolanass Waterfall up to vantage platform of The Spinc (from the Irish "An Spinc"; meaning "pointed hill"), which overlooks the upper lake and the Glendalough valley below. The most noted Spinc trail is the White Route which follows a further scenic boarded path westwards along the cliffs of the upper lake to the Glenealo Valley (home to herds of red deer ), and down on stone paths to

5004-466: Is grus , which is often made up of coarse-grained fragments of disintegrated granite. Climatic variations also influence the weathering rate of granites. For about two thousand years, the relief engravings on Cleopatra's Needle obelisk had survived the arid conditions of its origin before its transfer to London. Within two hundred years, the red granite has drastically deteriorated in the damp and polluted air there. Soil development on granite reflects

5143-545: Is microgranite . The extrusive igneous rock equivalent of granite is rhyolite . Granitic rock is widely distributed throughout the continental crust . Much of it was intruded during the Precambrian age; it is the most abundant basement rock that underlies the relatively thin sedimentary veneer of the continents. Outcrops of granite tend to form tors , domes or bornhardts , and rounded massifs . Granites sometimes occur in circular depressions surrounded by

5282-517: Is 3–6·10 Pa·s. The melting temperature of dry granite at ambient pressure is 1215–1260 °C (2219–2300 °F); it is strongly reduced in the presence of water, down to 650 °C at a few hundred megapascals of pressure. Granite has poor primary permeability overall, but strong secondary permeability through cracks and fractures if they are present. A worldwide average of the chemical composition of granite, by weight percent, based on 2485 analyses: The medium-grained equivalent of granite

5421-495: Is a bullaun stone. It sits on the south side of the Glenealo River, directly opposite ruins of St Ciarán’s church, beside the green road leading to the upper lake. Their original use is largely unknown, their original use many of these stones over time developed associations with the saints and were part of the post medieval pilgrim rituals. In August 2023, The Deer Stone was vandalised, causing permanent damage. Situated in

5560-543: Is a cave in the rock face about 8 metres above the level of the Upper Lake on its southerly side (with The Spinc cliffs above it). It was reputedly a retreat for St. Kevin and later for St. Laurence O'Toole. Partly man-made, it runs back 2 metres into the rock. A writer for the Dublin Penny Journal described the cave as "not bigger than a small baker's oven... I, and two young men who followed me, found it

5699-418: Is a good place to look for some of Ireland's newest breeding species, such as the goosander and the great spotted woodpecker , and some of the rarest, such as the common redstart and the wood warbler ; peregrine , white-throated dipper , common cuckoo , eurasian jay and common buzzard can also be seen. There are nine way-marked trails of varying difficulty around Glendalough that are maintained by

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5838-401: Is also An Caighdeán Oifigiúil , a standardised written form devised by a parliamentary commission in the 1950s. The traditional Irish alphabet , a variant of the Latin alphabet with 18 letters , has been succeeded by the standard Latin alphabet (albeit with 7–8 letters used primarily in loanwords ). Irish has constitutional status as the national and first official language of

5977-410: Is an excess of aluminum beyond what can be taken up in feldspars (Al 2 O 3 > CaO + K 2 O + Na 2 O) are described as peraluminous , and they contain aluminum-rich minerals such as muscovite . The average density of granite is between 2.65 and 2.75 g/cm (165 and 172 lb/cu ft), its compressive strength usually lies above 200 MPa (29,000 psi), and its viscosity near STP

6116-637: Is believed to have a mass of around 81 tonnes. It was the tallest temple in south India. Imperial Roman granite was quarried mainly in Egypt, and also in Turkey, and on the islands of Elba and Giglio . Granite became "an integral part of the Roman language of monumental architecture". The quarrying ceased around the third century AD. Beginning in Late Antiquity the granite was reused, which since at least

6255-434: Is called a binary or two-mica granite. Two-mica granites are typically high in potassium and low in plagioclase, and are usually S-type granites or A-type granites, as described below . Another aspect of granite classification is the ratios of metals that potentially form feldspars. Most granites have a composition such that almost all their aluminum and alkali metals (sodium and potassium) are combined as feldspar. This

6394-511: Is divided into four separate phases with the intention of improving 9 main areas of action including: The general goal for this strategy was to increase the number of daily speakers from 83,000 to 250,000 by the end of its run. By 2022, the number of such speakers had fallen to 71,968. Before the partition of Ireland in 1921, Irish was recognised as a school subject and as "Celtic" in some third level institutions. Between 1921 and 1972, Northern Ireland had devolved government. During those years

6533-433: Is limited by the amount of thermal energy available, which must be replenished by crystallization of higher-melting minerals in the magma. Thus, the magma is melting crustal rock at its roof while simultaneously crystallizing at its base. This results in steady contamination with crustal material as the magma rises. This may not be evident in the major and minor element chemistry, since the minerals most likely to crystallize at

6672-587: Is only in Gaeltacht areas that Irish continues to be spoken as a community vernacular to some extent. According to data compiled by the Department of Tourism, Culture, Arts, Gaeltacht , Sport and Media , only 1/4 of households in Gaeltacht areas are fluent in Irish. The author of a detailed analysis of the survey, Donncha Ó hÉallaithe of the Galway-Mayo Institute of Technology , described

6811-404: Is permeated by sheets and channels of light granitic rock (the leucosome ). The leucosome is interpreted as partial melt of a parent rock that has begun to separate from the remaining solid residue (the melanosome). If enough partial melt is produced, it will separate from the source rock, become more highly evolved through fractional crystallization during its ascent toward the surface, and become

6950-454: Is relieved when overlying material is removed by erosion or other processes. Chemical weathering of granite occurs when dilute carbonic acid , and other acids present in rain and soil waters, alter feldspar in a process called hydrolysis . As demonstrated in the following reaction, this causes potassium feldspar to form kaolinite , with potassium ions, bicarbonate, and silica in solution as byproducts. An end product of granite weathering

7089-402: Is round-headed, with a hood moulding and two very worn carved heads on the outside. A simple nave-and-chancel church, with a fine chancel arch. Trinity Church is beside the main road. A square-headed doorway in the west gable leads into a later annexe, possibly a sacristy. A round tower or belfry was constructed over a vault in this chamber. This fell in a storm in 1818. The doorway inserted in

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7228-411: Is some concern that some granite sold as countertops or building material may be hazardous to health. Dan Steck of St. Johns University has stated that approximately 5% of all granite is of concern, with the caveat that only a tiny percentage of the tens of thousands of granite slab types have been tested. Resources from national geological survey organizations are accessible online to assist in assessing

7367-412: Is still spoken daily to some extent as a first language . These regions are known individually and collectively as the Gaeltacht (plural Gaeltachtaí ). While the fluent Irish speakers of these areas, whose numbers have been estimated at 20–30,000, are a minority of the total number of fluent Irish speakers, they represent a higher concentration of Irish speakers than other parts of the country and it

7506-451: Is surrounded by semi-natural oak woodland. Much of this was formerly coppiced (cut to the base at regular intervals) to produce wood, charcoal and bark. In the springtime, the oakwood floor is carpeted with a display of bluebells , wood sorrel and wood anemones . Other common plants are woodrush , bracken , polypody fern and various species of mosses . The understorey is largely of holly , hazel and mountain ash . Glendalough

7645-479: Is that magma will rise through the crust as a single mass through buoyancy . As it rises, it heats the wall rocks , causing them to behave as a power-law fluid and thus flow around the intrusion allowing it to pass without major heat loss. This is entirely feasible in the warm, ductile lower crust where rocks are easily deformed, but runs into problems in the upper crust which is far colder and more brittle. Rocks there do not deform so easily: for magma to rise as

7784-410: Is the case when K 2 O + Na 2 O + CaO > Al 2 O 3 > K 2 O + Na 2 O. Such granites are described as normal or metaluminous . Granites in which there is not enough aluminum to combine with all the alkali oxides as feldspar (Al 2 O 3 < K 2 O + Na 2 O) are described as peralkaline , and they contain unusual sodium amphiboles such as riebeckite . Granites in which there

7923-475: Is the largest and most imposing of the buildings at Glendalough, the cathedral had several phases of construction, the earliest, consisting of the present nave with its antae. The large mica-schist stones which can be seen up to the height of the square-headed west doorway were re-used from an earlier smaller church. The chancel and sacristy date from the late 12th and early 13th centuries. The chancel arch and east window were finely decorated, though many of

8062-489: Is typical of a larger family of granitic rocks , or granitoids , that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification ), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though

8201-409: Is typically orthoclase or microcline and is often perthitic . The plagioclase is typically sodium-rich oligoclase . Phenocrysts are usually alkali feldspar. Granitic rocks are classified according to the QAPF diagram for coarse grained plutonic rocks and are named according to the percentage of quartz , alkali feldspar ( orthoclase , sanidine , or microcline ) and plagioclase feldspar on

8340-428: Is uncommon, is classified simply as quartz-rich granitoid or, if composed almost entirely of quartz, as quartzolite . True granites are further classified by the percentage of their total feldspar that is alkali feldspar. Granites whose feldspar is 65% to 90% alkali feldspar are syenogranites , while the feldspar in monzogranite is 35% to 65% alkali feldspar. A granite containing both muscovite and biotite micas

8479-721: The Fíor-Ghaeltacht (true Gaeltacht ), a term originally officially applied to areas where over 50% of the population spoke Irish. There are Gaeltacht regions in the following counties: Gweedore ( Gaoth Dobhair ), County Donegal, is the largest Gaeltacht parish in Ireland. Irish language summer colleges in the Gaeltacht are attended by tens of thousands of teenagers annually. Students live with Gaeltacht families, attend classes, participate in sports, go to céilithe and are obliged to speak Irish. All aspects of Irish culture and tradition are encouraged. The Act

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8618-712: The Insular Celtic sub branch of the family and is indigenous to the island of Ireland . It was the majority of the population's first language until the 19th century, when English gradually became dominant, particularly in the last decades of the century, in what is sometimes characterised as a result of linguistic imperialism . Today, Irish is still commonly spoken as a first language in Ireland's Gaeltacht regions, in which 2% of Ireland's population lived in 2022. The total number of people (aged 3 and over) in Ireland who declared they could speak Irish in April 2022

8757-554: The Luganure mineral vein which is a source of lead in the form of galena (PbS), and also contains traces of silver. While the main Camaderry mines were in the neighbouring Glendasan Valley, a second Miner's Village and processing facilities were constructed at the head of the Glendalough valley, which was nick-named Van Diemen's Land by the miners. In 1859, the Glendasan and Glendalough mines were connected with each other by

8896-565: The Mining Company of Ireland . A second phase took place between 1890 and 1925 by the local Wynne family. The mines were re-opened briefly from 1948 to 1957 after which mining ceased completely. The valley of Glendalough was formed during the last ice age by a glacier which left a moraine across the valley mouth. The Poulanass River , which plunges into the valley from the south, via the Poulanass Waterfall , created

9035-631: The Republic of Ireland , and is also an official language of Northern Ireland and among the official languages of the European Union . The public body Foras na Gaeilge is responsible for the promotion of the language throughout the island. Irish has no regulatory body but An Caighdeán Oifigiúil , the standard written form, is guided by a parliamentary service and new vocabulary by a voluntary committee with university input. In An Caighdeán Oifigiúil ("The Official [Written] Standard ")

9174-544: The Wicklow Mountains National Park (and who provide a map of all trails). Some of the trails stay on mostly flat-ground pathways around the two lakes of Glendalough ( The Miner's Road Walk , Green Road Walk ), others lead up the Poolanass Waterfall area with options beyond into a network of forest paths (e.g. Derrybawn Woodland Trail ). The most notable trails used to take the steep 600–step boarded path (using railway sleepers ), but replaced by

9313-611: The 'Glendalough Mining Company' in partnership with local investors. Weaver had previously been involved with mapping the geology of Wicklow, after the Wicklow gold rush of 1795, 14 years prior. In 1825, the Glendalough Mining Company took over the Glendasan mines when they bought Weaver's shares. Mining in Glendalough/Glendasan took place in three phases. The first phase was from 1825 to 1890 by

9452-634: The 17th century, largely as a result of the Cromwellian conquest of Ireland , which saw many Irish sent to the West Indies . Irish emigration to the United States was well established by the 18th century, and was reinforced in the 1840s by thousands fleeing from the Famine . This flight also affected Britain. Up until that time most emigrants spoke Irish as their first language, though English

9591-416: The 1870s using stones found on the site. The Romanesque chancel arch has three orders, with highly ornamented capitals. The east window has two round-headed lights. Its decorated features include a serpent, a lion, and two birds holding a human head between their beaks. A staircase in the eastern wall leading from an adjoining domestic building would have given access to a room over the chancel. The Deer stone

9730-789: The 1998 Good Friday Agreement , the language gradually received a degree of formal recognition in Northern Ireland from the United Kingdom, and then, in 2003, by the British government's ratification in respect of the language of the European Charter for Regional or Minority Languages . In the 2006 St Andrews Agreement the British government promised to enact legislation to promote the language and in 2022 it approved legislation to recognise Irish as an official language alongside English. The bill received royal assent on 6 December 2022. The Irish language has often been used as

9869-400: The 2021 census of Northern Ireland , 43,557 individuals stated they spoke Irish on a daily basis, 26,286 spoke it on a weekly basis, 47,153 spoke it less often than weekly, and 9,758 said they could speak Irish, but never spoke it. From 2006 to 2008, over 22,000 Irish Americans reported speaking Irish as their first language at home, with several times that number claiming "some knowledge" of

10008-403: The 6th century, used the Latin alphabet and is attested primarily in marginalia to Latin manuscripts. During this time, the Irish language absorbed some Latin words, some via Old Welsh , including ecclesiastical terms : examples are easpag (bishop) from episcopus , and Domhnach (Sunday, from dominica ). By the 10th century, Old Irish had evolved into Middle Irish , which

10147-571: The A-Q-P half of the diagram. True granite (according to modern petrologic convention) contains between 20% and 60% quartz by volume, with 35% to 90% of the total feldspar consisting of alkali feldspar . Granitic rocks poorer in quartz are classified as syenites or monzonites , while granitic rocks dominated by plagioclase are classified as granodiorites or tonalites . Granitic rocks with over 90% alkali feldspar are classified as alkali feldspar granites . Granitic rock with more than 60% quartz, which

10286-571: The Act all detailing different aspects of the use of Irish in official documentation and communication. Included in these sections are subjects such as Irish language use in official courts, official publications, and placenames. The Act was recently amended in December 2019 in order to strengthen the already preexisting legislation. All changes made took into account data collected from online surveys and written submissions. The Official Languages Scheme

10425-471: The European Union , only co-decision regulations were available until 2022, due to a five-year derogation, requested by the Irish Government when negotiating the language's new official status. The Irish government had committed itself to train the necessary number of translators and interpreters and to bear the related costs. This derogation ultimately came to an end on 1 January 2022, making Irish

10564-551: The European Union safety standards (section 4.1.1.1 of the National Health and Engineering study) and radon emission levels well below the average outdoor radon concentrations in the US. Granite and related marble industries are considered one of the oldest industries in the world, existing as far back as Ancient Egypt . Major modern exporters of granite include China, India, Italy, Brazil, Canada, Germany, Sweden, Spain and

10703-549: The Irish language policy followed by Irish governments as a "complete and absolute disaster". The Irish Times , referring to his analysis published in the Irish language newspaper Foinse , quoted him as follows: "It is an absolute indictment of successive Irish Governments that at the foundation of the Irish State there were 250,000 fluent Irish speakers living in Irish-speaking or semi Irish-speaking areas, but

10842-516: The Miner's Village, and back along the Miner's Road on the north shore of the upper lake, to finish at the upper lake car park, (off the R757). As the entire White Route loop is on paths (either stone/sand paths or boarded railway sleepers), it can be completed in running shoes and does not require climbing footwear; the entire 9-kilometre loop of the White Route , starting and ending at the upper lake car-park, takes circa 2–3 hours. The Wicklow Way ,

10981-620: The Republic of Ireland ), new appointees to the Civil Service of the Republic of Ireland , including postal workers , tax collectors , agricultural inspectors, Garda Síochána (police), etc., were required to have some proficiency in Irish. By law, a Garda who was addressed in Irish had to respond in Irish as well. In 1974, in part through the actions of protest organisations like the Language Freedom Movement ,

11120-482: The Roman Catholic Church and is used for bishops who hold no ordinary power of their own, and thus are titular bishops . See Annals of Inisfallen (AI) The Gateway to the monastic city of Glendalough is one of the most important monuments, now totally unique in Ireland. It was originally two-storeyed with two fine, granite arches . The antae or projecting walls at each end suggest that it had

11259-448: The United States. The Red Pyramid of Egypt ( c.  2590 BC ), named for the light crimson hue of its exposed limestone surfaces, is the third largest of Egyptian pyramids . Pyramid of Menkaure , likely dating 2510 BC, was constructed of limestone and granite blocks. The Great Pyramid of Giza (c. 2580 BC ) contains a huge granite sarcophagus fashioned of "Red Aswan Granite". The mostly ruined Black Pyramid dating from

11398-419: The base of the chamber are the same ones that would crystallize anyway, but crustal assimilation is detectable in isotope ratios. Heat loss to the country rock means that ascent by assimilation is limited to distance similar to the height of the magma chamber. Physical weathering occurs on a large scale in the form of exfoliation joints , which are the result of granite's expanding and fracturing as pressure

11537-746: The beginning of the following academic year. For a number of years there has been vigorous debate in political, academic and other circles about the failure of most students in English-medium schools to achieve competence in Irish, even after fourteen years of teaching as one of the three main subjects. The concomitant decline in the number of traditional native speakers has also been a cause of great concern. In 2007, filmmaker Manchán Magan found few Irish speakers in Dublin , and faced incredulity when trying to get by speaking only Irish in Dublin. He

11676-418: The big difference in rheology between mafic and felsic magmas makes this process problematic in nature. Granitization is an old, and largely discounted, hypothesis that granite is formed in place through extreme metasomatism . The idea behind granitization was that fluids would supposedly bring in elements such as potassium, and remove others, such as calcium, to transform a metamorphic rock into granite. This

11815-473: The church is a raised platform with stone enclosure walls, where dwelling huts probably stood. The church, partly rebuilt in the 12th century, has a granite doorway with inclined jambs. At the east gable is an inscribed Latin Cross together with several plain grave slabs and three small crosses. Camaderry Mountain 699 metres (2,293 ft) which overlooks the upper Glendalough Lake from the north shore, contains

11954-404: The division between S-type (produced by underplating) and I-type (produced by injection and differentiation) granites, discussed below. The composition and origin of any magma that differentiates into granite leave certain petrological evidence as to what the granite's parental rock was. The final texture and composition of a granite are generally distinctive as to its parental rock. For instance,

12093-473: The early 16th century became known as spolia . Through the process of case-hardening , granite becomes harder with age. The technology required to make tempered metal chisels was largely forgotten during the Middle Ages. As a result, Medieval stoneworkers were forced to use saws or emery to shorten ancient columns or hack them into discs. Giorgio Vasari noted in the 16th century that granite in quarries

12232-474: The end of the famine, and under 17,000 by 1911. Irish is recognised by the Constitution of Ireland as the national and first official language of Republic of Ireland (English being the other official language). Despite this, almost all government business and legislative debate is conducted in English. In 1938, the founder of Conradh na Gaeilge (Gaelic League), Douglas Hyde , was inaugurated as

12371-560: The first President of Ireland . The record of his delivering his inaugural Declaration of Office in Roscommon Irish is one of only a few recordings of that dialect. In the 2016 census, 10.5% of respondents stated that they spoke Irish, either daily or weekly, while over 70,000 people (4.2%) speak it as a habitual daily means of communication. From the foundation of the Irish Free State in 1922 (see History of

12510-579: The first magma to enter solidifies and provides a form of insulation for later magma. These mechanisms can operate in tandem. For example, diapirs may continue to rise through the brittle upper crust through stoping , where the granite cracks the roof rocks, removing blocks of the overlying crust which then sink to the bottom of the diapir while the magma rises to take their place. This can occur as piecemeal stopping (stoping of small blocks of chamber roof), as cauldron subsidence (collapse of large blocks of chamber roof), or as roof foundering (complete collapse of

12649-439: The founder of Clonmacnoise , a monastic settlement that had associations with Glendalough during the 10th century. One of the earliest and best constructed of the churches, St. Mary's or Our Lady's Church consists of a nave with a later chancel. Its granite west doorway with an architrave , has inclined jambs and a massive lintel. The underside of the lintel is inscribed with an unusual saltire or x-shaped cross. The east window

12788-713: The grotto is a highly regarded piece of Buddhist art , and along with the temple complex to which it belongs, Seokguram was added to the UNESCO World Heritage List in 1995. Rajaraja Chola I of the Chola Dynasty in South India built the world's first temple entirely of granite in the 11th century AD in Tanjore , India . The Brihadeeswarar Temple dedicated to Lord Shiva was built in 1010. The massive Gopuram (ornate, upper section of shrine)

12927-716: The language family, is derived from the Old Irish term. Endonyms of the language in the various modern Irish dialects include: Gaeilge [ˈɡeːlʲɟə] in Galway, Gaeilg / Gaeilic / Gaeilig [ˈɡeːlʲəc] in Mayo and Ulster , Gaelainn / Gaoluinn [ˈɡeːl̪ˠən̠ʲ] in West/Cork, Kerry Munster , as well as Gaedhealaing in mid and East Kerry/Cork and Waterford Munster to reflect local pronunciation. Gaeilge also has

13066-410: The language was in use by all classes, Irish being an urban as well as a rural language. This linguistic dynamism was reflected in the efforts of certain public intellectuals to counter the decline of the language. At the end of the 19th century, they launched the Gaelic revival in an attempt to encourage the learning and use of Irish, although few adult learners mastered the language. The vehicle of

13205-476: The language. For most of recorded Irish history , Irish was the dominant language of the Irish people , who took it with them to other regions , such as Scotland and the Isle of Man , where Middle Irish gave rise to Scottish Gaelic and Manx . It was also, for a period, spoken widely across Canada , with an estimated 200,000–250,000 daily Canadian speakers of Irish in 1890. On the island of Newfoundland ,

13344-474: The lower crust , rather than by decompression of mantle rock, as is the case with basaltic magmas. It has also been suggested that some granites found at convergent boundaries between tectonic plates , where oceanic crust subducts below continental crust, were formed from sediments subducted with the oceanic plate. The melted sediments would have produced magma intermediate in its silica content, which became further enriched in silica as it rose through

13483-729: The lower continental crust at high thermal gradients. This leads to significant extraction of hydrous felsic melts from granulite-facies resitites. A-type granites occur in the Koettlitz Glacier Alkaline Province in the Royal Society Range, Antarctica. The rhyolites of the Yellowstone Caldera are examples of volcanic equivalents of A-type granite. M-type granite was later proposed to cover those granites that were clearly sourced from crystallized mafic magmas, generally sourced from

13622-435: The magma is inevitable once enough magma has accumulated. However, the question of precisely how such large quantities of magma are able to shove aside country rock to make room for themselves (the room problem ) is still a matter of research. Two main mechanisms are thought to be important: Of these two mechanisms, Stokes diapirism has been favoured for many years in the absence of a reasonable alternative. The basic idea

13761-426: The magma. Other processes must produce these great volumes of felsic magma. One such process is injection of basaltic magma into the lower crust, followed by differentiation, which leaves any cumulates in the mantle. Another is heating of the lower crust by underplating basaltic magma, which produces felsic magma directly from crustal rock. The two processes produce different kinds of granites, which may be reflected in

13900-408: The magmatic parent of granitic rock. The residue of the source rock becomes a granulite . The partial melting of solid rocks requires high temperatures and the addition of water or other volatiles which lower the solidus temperature (temperature at which partial melting commences) of these rocks. It was long debated whether crustal thickening in orogens (mountain belts along convergent boundaries )

14039-405: The mantle. Although the fractional crystallisation of basaltic melts can yield small amounts of granites, which are sometimes found in island arcs, such granites must occur together with large amounts of basaltic rocks. H-type granites were suggested for hybrid granites, which were hypothesized to form by mixing between mafic and felsic from different sources, such as M-type and S-type. However,

14178-582: The mid-18th century, English was becoming a language of the Catholic middle class, the Catholic Church and public intellectuals, especially in the east of the country. Increasingly, as the value of English became apparent, parents sanctioned the prohibition of Irish in schools. Increasing interest in emigrating to the United States and Canada was also a driver, as fluency in English allowed

14317-520: The monks and a large lay population. The buildings which survive probably date from between the 10th and 12th centuries. The Church of Ireland maintains the diocese of Glendalough in union with the diocese of Dublin- together being the Diocese of Dublin and Glendalough . As such, the Archbishop of Dublin is also styled as bishop of Glendalough. Since 1969, Glendalough has been a titular see in

14456-804: The name of the language is Gaeilge , from the South Connacht form, spelled Gaedhilge prior the spelling reform of 1948, which was originally the genitive of Gaedhealg , the form used in Classical Gaelic . The modern spelling results from the deletion of the silent ⟨dh⟩ in Gaedhilge . Older spellings include Gaoidhealg [ˈɡeːʝəlˠəɡ] in Classical Gaelic and Goídelc [ˈɡoiðʲelɡ] in Old Irish . Goidelic , used to refer to

14595-469: The new immigrants to get jobs in areas other than farming. An estimated one quarter to one third of US immigrants during the Great Famine were Irish speakers. Irish was not marginal to Ireland's modernisation in the 19th century, as is often assumed. In the first half of the century there were still around three million people for whom Irish was the primary language, and their numbers alone made them

14734-655: The number now is between 20,000 and 30,000." In the 1920s, when the Irish Free State was founded, Irish was still a vernacular in some western coastal areas. In the 1930s, areas where more than 25% of the population spoke Irish were classified as Gaeltacht . Today, the strongest Gaeltacht areas, numerically and socially, are those of South Connemara , the west of the Dingle Peninsula , and northwest Donegal, where many residents still use Irish as their primary language. These areas are often referred to as

14873-503: The other official language, if not already passed in both official languages. In November 2016, RTÉ reported that over 2.3 million people worldwide were learning Irish through the Duolingo app. Irish president Michael D. Higgins officially honoured several volunteer translators for developing the Irish edition, and said the push for Irish language rights remains an "unfinished project". There are rural areas of Ireland where Irish

15012-490: The other side of the Poulanass River, close to Reefert are the remains of another small church. Built on a rocky spur over the lake, this stone structure was 3.6 metres in diameter with walls 0.9 metres thick and a doorway on the east side. Only the foundations survive today and it is possible that the cell had a stone-corbelled roof, similar to the beehive huts on Skellig Michael , County Kerry . St. Kevin's Bed

15151-522: The other side of the upper lake are not considered suitable for rock-climbing. The 2009 Mountaineering Ireland climbing guidebook for Wicklow, as well as the online guidebooks for Glendalough, list about 144 routes at all grades up to E5 6b ( Bathsheba and The Wake ); the cliffs are particularly noted for their long, and multi-pitch, VS/HVS routes. The climbs vary between one and four pitches , and up to over 100 metres in length. There are several sectors: The Irish Mountaineering Club has operated

15290-441: The overlying crust. Early fractional crystallisation serves to reduce a melt in magnesium and chromium, and enrich the melt in iron, sodium, potassium, aluminum, and silicon. Further fractionation reduces the content of iron, calcium, and titanium. This is reflected in the high content of alkali feldspar and quartz in granite. The presence of granitic rock in island arcs shows that fractional crystallization alone can convert

15429-557: The political party holding power in the Stormont Parliament , the Ulster Unionist Party (UUP), was hostile to the language. The context of this hostility was the use of the language by nationalists. In broadcasting, there was an exclusion on the reporting of minority cultural issues, and Irish was excluded from radio and television for almost the first fifty years of the previous devolved government. After

15568-736: The reign of Amenemhat III once had a polished granite pyramidion or capstone, which is now on display in the main hall of the Egyptian Museum in Cairo (see Dahshur ). Other uses in Ancient Egypt include columns , door lintels , sills , jambs , and wall and floor veneer. How the Egyptians worked the solid granite is still a matter of debate. Tool marks described by the Egyptologist Anna Serotta indicate

15707-492: The relationship between the three Goidelic languages (Irish, Scottish Gaelic and Manx). Gaelic is a collective term for the Goidelic languages, and when the context is clear it may be used without qualification to refer to each language individually. When the context is specific but unclear, the term may be qualified, as Irish Gaelic, Scottish Gaelic or Manx Gaelic. Historically the name "Erse" ( / ɜːr s / URS )

15846-432: The requirement for entrance to the public service was changed to proficiency in just one official language. Nevertheless, Irish remains a required subject of study in all schools in the Republic of Ireland that receive public money (see Education in the Republic of Ireland ). Teachers in primary schools must also pass a compulsory examination called Scrúdú Cáilíochta sa Ghaeilge . As of 2005, Garda Síochána recruits need

15985-647: The revival was the Gaelic League ( Conradh na Gaeilge ), and particular emphasis was placed on the folk tradition, which in Irish is particularly rich. Efforts were also made to develop journalism and a modern literature. Although it has been noted that the Catholic Church played a role in the decline of the Irish language before the Gaelic Revival, the Protestant Church of Ireland also made only minor efforts to encourage use of Irish in

16124-564: The risk factors in granite country and design rules relating, in particular, to preventing accumulation of radon gas in enclosed basements and dwellings. A study of granite countertops was done (initiated and paid for by the Marble Institute of America) in November 2008 by National Health and Engineering Inc. of USA. In this test, all of the 39 full-size granite slabs that were measured for the study showed radiation levels well below

16263-418: The rock's high quartz content and dearth of available bases, with the base-poor status predisposing the soil to acidification and podzolization in cool humid climates as the weather-resistant quartz yields much sand. Feldspars also weather slowly in cool climes, allowing sand to dominate the fine-earth fraction. In warm humid regions, the weathering of feldspar as described above is accelerated so as to allow

16402-414: The rocks often bear a close resemblance. Under these conditions, granitic melts can be produced in place through the partial melting of metamorphic rocks by extracting melt-mobile elements such as potassium and silicon into the melts but leaving others such as calcium and iron in granulite residues. This may be the origin of migmatites . A migmatite consists of dark, refractory rock (the melanosome ) that

16541-492: The roof of a shallow magma chamber accompanied by a caldera eruption.) There is evidence for cauldron subsidence at the Mt. Ascutney intrusion in eastern Vermont. Evidence for piecemeal stoping is found in intrusions that are rimmed with igneous breccia containing fragments of country rock. Assimilation is another mechanism of ascent, where the granite melts its way up into the crust and removes overlying material in this way. This

16680-569: The solitude of St. Kevin's Bed. He died in Eu , in Normandy in 1180. In 1176, the Annals of Tigernach report that Glendalough was 'plundered by the foreigners'. In 1214, the dioceses of Glendalough and Dublin were united. From that time onwards, the cultural and ecclesiastical status of Glendalough diminished. The destruction of the settlement by English forces in 1398 left it a ruin but it continued as

16819-473: The south wall of the nave also dates from this period. Projecting corbels at the gables would have carried the verge timbers of the roof. It is a simple nave and chancel church with an addition to the west end of the 9 metre long by 5.5 metre wide nave. The most recent of the Glendalough churches, St. Saviour's priory was built in the 12th century, probably at the time of St. Laurence O'Toole. The nave and chancel with their fine decorate stones were restored in

16958-426: The stones are now missing. The north doorway to the nave also dates from this period. Under the southern window of the chancel, there is an ambry or wall cupboard and a piscina , a basin used for washing the sacred vessels. A few metres south of the cathedral an early cross of local granite, with an unpierced ring, is commonly known as St. Kevin's Cross. Almost totally reconstructed from the original stones, based on

17097-435: The surface than magmas of I-type granites, which are thus more common as volcanic rock (rhyolite). They are also orogenic but range from metaluminous to strongly peraluminous. Although both I- and S-type granites are orogenic, I-type granites are more common close to the convergent boundary than S-type. This is attributed to thicker crust further from the boundary, which results in more crustal melting. A-type granites show

17236-440: The texture is known as porphyritic . A granitic rock with a porphyritic texture is known as a granite porphyry . Granitoid is a general, descriptive field term for lighter-colored, coarse-grained igneous rocks. Petrographic examination is required for identification of specific types of granitoids. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy . The alkali feldspar in granites

17375-502: The uranium washes into the sediments from the granite uplands and associated, often highly radioactive pegmatites. Cellars and basements built into soils over granite can become a trap for radon gas, which is formed by the decay of uranium. Radon gas poses significant health concerns and is the number two cause of lung cancer in the US behind smoking. Thorium occurs in all granites. Conway granite has been noted for its relatively high thorium concentration of 56±6 ppm. There

17514-617: The use of flint tools on finer work with harder stones, e.g. when producing the hieroglyphic inscriptions. Patrick Hunt has postulated that the Egyptians used emery , which has greater hardness. The Seokguram Grotto in Korea is a Buddhist shrine and part of the Bulguksa temple complex. Completed in 774 AD, it is an artificial grotto constructed entirely of granite. The main Buddha of

17653-726: The vacancy to which they are appointed. This requirement is laid down by the University College Galway Act, 1929 (Section 3). In 2016, the university faced controversy when it announced the planned appointment of a president who did not speak Irish. Misneach staged protests against this decision. The following year the university announced that Ciarán Ó hÓgartaigh , a fluent Irish speaker, would be its 13th president. He assumed office in January 2018; in June 2024, he announced he would be stepping down as president at

17792-594: The work of such writers as Geoffrey Keating , is said to date from the 17th century, and was the medium of popular literature from that time on. From the 18th century on, the language lost ground in the east of the country. The reasons behind this shift were complex but came down to a number of factors: The change was characterised by diglossia (two languages being used by the same community in different social and economic situations) and transitional bilingualism (monoglot Irish-speaking grandparents with bilingual children and monoglot English-speaking grandchildren). By

17931-465: Was 1,873,997, representing 40% of respondents, but of these, 472,887 said they never spoke it and a further 551,993 said they only spoke it within the education system. Linguistic analyses of Irish speakers are therefore based primarily on the number of daily users in Ireland outside the education system, which in 2022 was 20,261 in the Gaeltacht and 51,707 outside it, totalling 71,968. In response to

18070-531: Was also sometimes used in Scots and then in English to refer to Irish; as well as Scottish Gaelic. Written Irish is first attested in Ogham inscriptions from the 4th century AD, a stage of the language known as Primitive Irish . These writings have been found throughout Ireland and the west coast of Great Britain. Primitive Irish underwent a change into Old Irish through the 5th century. Old Irish, dating from

18209-573: Was built in 2004 and is currently located in Roskilde, Denmark . At the Synod of Rath Breasail in 1111, Glendalough was designated as one of the two dioceses of North Leinster. The Book of Glendalough was written there about 1131 . St. Laurence O'Toole , born in 1128, became Abbot of Glendalough and was well known for his sanctity and hospitality. Even after his appointment as Archbishop of Dublin in 1162, he returned occasionally to Glendalough, to

18348-668: Was enacted 1 July 2019 and is an 18-page document that adheres to the guidelines of the Official Languages Act 2003 . The purpose of the Scheme is to provide services through the mediums of Irish and/or English. According to the Department of the Taoiseach, it is meant to "develop a sustainable economy and a successful society, to pursue Ireland's interests abroad, to implement the Government's Programme and to build

18487-489: Was establishing itself as the primary language. Irish speakers had first arrived in Australia in the late 18th century as convicts and soldiers, and many Irish-speaking settlers followed, particularly in the 1860s. New Zealand also received some of this influx. Argentina was the only non-English-speaking country to receive large numbers of Irish emigrants, and there were few Irish speakers among them. Granite Granite

18626-474: Was passed 14 July 2003 with the main purpose of improving the number and quality of public services delivered in Irish by the government and other public bodies. Compliance with the Act is monitored by the An Coimisinéir Teanga (Irish Language Commissioner) which was established in 2004 and any complaints or concerns pertaining to the Act are brought to them. There are 35 sections included in

18765-464: Was rebuilt in 1876 using the original stones. The tower originally had six timber floors, connected by ladders. The four storeys above entrance level are each lit by a small window; while the top storey has four windows facing the cardinal compass points . Round towers , landmarks for approaching visitors, were built as bell towers , but also served on occasion as store-houses and as places of refuge in times of attack. St. Peter and St. Pauls' Cathedral

18904-693: Was spoken throughout Ireland, Isle of Man and parts of Scotland . It is the language of a large corpus of literature, including the Ulster Cycle . From the 12th century, Middle Irish began to evolve into modern Irish in Ireland, into Scottish Gaelic in Scotland, and into the Manx language in the Isle of Man . Early Modern Irish , dating from the 13th century, was the basis of the literary language of both Ireland and Gaelic-speaking Scotland. Modern Irish, sometimes called Late Modern Irish, as attested in

19043-405: Was sufficient to produce granite melts by radiogenic heating , but recent work suggests that this is not a viable mechanism. In-situ granitization requires heating by the asthenospheric mantle or by underplating with mantle-derived magmas. Granite magmas have a density of 2.4 Mg/m , much less than the 2.8 Mg/m of high-grade metamorphic rock. This gives them tremendous buoyancy, so that ascent of

19182-564: Was supposed to occur across a migrating front. However, experimental work had established by the 1960s that granites were of igneous origin. The mineralogical and chemical features of granite can be explained only by crystal-liquid phase relations, showing that there must have been at least enough melting to mobilize the magma. However, at sufficiently deep crustal levels, the distinction between metamorphism and crustal melting itself becomes vague. Conditions for crystallization of liquid magma are close enough to those of high-grade metamorphism that

19321-442: Was unable to accomplish some everyday tasks, as portrayed in his documentary No Béarla . There is, however, a growing body of Irish speakers in urban areas, particularly in Dublin. Many have been educated in schools in which Irish is the language of instruction. Such schools are known as Gaelscoileanna at primary level. These Irish-medium schools report some better outcomes for students than English-medium schools. In 2009,

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