:Ireland is an island in

Northwestern Europe Northwestern Europe, or Northwest Europe, is a loosely defined subregion of Europe, overlapping Northern and Western Europe. The region can be defined both geographically and ethnographically. Geographic definitions Geographically, North ...

in the north

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

. The island lies on the European continental shelf, part of the

Eurasian Plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent an ...

. The island's main

geographical Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and ...

features include low central

plain In geography, a plain is a flat expanse of land that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands ...

s surrounded by coastal mountains. The highest peak is

Carrauntoohil Carrauntoohil or Carrauntoohill ( ; ga, Corrán Tuathail , meaning "Tuathal's sickle") is the highest mountain in Ireland at . It is on the Iveragh Peninsula in County Kerry, close to the centre of Ireland's highest mountain range, MacGillycu ...

( ga, Corrán Tuathail), which is above sea level. The western

coast The coast, also known as the coastline or seashore, is defined as the area where land meets the ocean, or as a line that forms the boundary between the land and the coastline. The Earth has around of coastline. Coasts are important zones in n ...

line is rugged, with many islands,

peninsula A peninsula (; ) is a landform that extends from a mainland and is surrounded by water on most, but not all of its borders. A peninsula is also sometimes defined as a piece of land bordered by water on three of its sides. Peninsulas exist on a ...

s, headlands and bays. The island is bisected by the

River Shannon The River Shannon ( ga, Abhainn na Sionainne, ', '), at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of the island of Ireland. The Sha ...

, which at with a

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...

is the longest river in Ireland and flows south from

County Cavan County Cavan ( ; gle, Contae an Chabháin) is a county in Ireland. It is in the province of Ulster and is part of the Border Region. It is named after the town of Cavan and is based on the historic Gaelic territory of East Breffny (''Bréifn ...

Ulster Ulster (; ga, Ulaidh or ''Cúige Uladh'' ; sco, label= Ulster Scots, Ulstèr or ''Ulster'') is one of the four traditional Irish provinces. It is made up of nine counties: six of these constitute Northern Ireland (a part of the United Kin ...

to meet the Atlantic just south of

Limerick Limerick ( ; ga, Luimneach ) is a western city in Ireland situated within County Limerick. It is in the province of Munster and is located in the Mid-West which comprises part of the Southern Region. With a population of 94,192 at the 2 ...

. There are a number of sizeable lakes along Ireland's rivers, of which

Lough Neagh Lough Neagh ( ) is a freshwater lake in Northern Ireland and is the largest lake in the island of Ireland, the United Kingdom and the British Isles. It has a surface area of and supplies 40% of Northern Ireland's water. Its main inflows come ...

is the largest. Politically, the island consists of the

Republic of Ireland Ireland ( ga, Éire ), also known as the Republic of Ireland (), is a country in north-western Europe consisting of 26 of the 32 counties of the island of Ireland. The capital and largest city is Dublin, on the eastern side of the island. ...

, with jurisdiction over about five-sixths of the island, and

Northern Ireland Northern Ireland ( ga, Tuaisceart Éireann ; sco, label=Ulster Scots dialect, Ulster-Scots, Norlin Airlann) is a part of the United Kingdom, situated in the north-east of the island of Ireland, that is #Descriptions, variously described as ...

, a constituent country of the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and ...

, with jurisdiction over the remaining sixth. Located west of the island of Great Britain, it is located at approximately . It has a total area of . It is separated from Great Britain by the

Irish Sea The Irish Sea or , gv, Y Keayn Yernagh, sco, Erse Sie, gd, Muir Èireann , Ulster-Scots: ''Airish Sea'', cy, Môr Iwerddon . is an extensive body of water that separates the islands of Ireland and Great Britain. It is linked to the C ...

and from mainland Europe by the

Celtic Sea The Celtic Sea ; cy, Y Môr Celtaidd ; kw, An Mor Keltek ; br, Ar Mor Keltiek ; french: La mer Celtique is the area of the Atlantic Ocean off the southern coast of Ireland bounded to the east by Saint George's Channel; other limits includ ...

. Ireland forms the second largest landmass in the North-West European Archipelago, together with nearby islands including Great Britain and the Isle of Man, known in the United Kingdom as the

British Isles The British Isles are a group of islands in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isl ...

Geological development

The geology of Ireland is diverse. Different regions contain rocks belonging to different geological periods, dating back almost 2 billion years. The oldest known Irish rock is about 1.7 billion years old and is found on

Inishtrahull Island Inishtrahull ( ga, Inis Trá Tholl, possibly "island of the empty beach" or "island of the yonder beach") is the most northerly island of Ireland. It has an area of and lies about northeast of Malin Head, County Donegal. The most northerly ...

off the north coast of

Inishowen Inishowen () is a peninsula in the north of County Donegal in Ireland. Inishowen is the largest peninsula on the island of Ireland. The Inishowen peninsula includes Ireland's most northerly point, Malin Head. The Grianan of Aileach, a ringfort ...

and on the mainland at Annagh Head on the

Mullet Peninsula The Mullet Peninsula ( ga, Leithinis an Mhuirthead)—also known as the Mullet (''an Mhuirthead'') and sometimes as the Erris Peninsula—is a peninsula in the barony of Erris in County Mayo, Ireland. As of 2016 it has a population of 3963. I ...

. The newer formations are the

drumlin A drumlin, from the Irish word ''droimnín'' ("littlest ridge"), first recorded in 1833, in the classical sense is an elongated hill in the shape of an inverted spoon or half-buried egg formed by glacial ice acting on underlying unconsolidated ...

s and glacial valleys as a result of the last ice age, and the sinkholes and cave formations in the limestone regions of Clare. Ireland's geological history covers everything from

volcanism Volcanism, vulcanism or volcanicity is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics, and volcanic gases erupt through a break in the surface called a ...

and tropical seas to the last glacial period. Ireland was formed in two distinct parts and slowly joined together, uniting about 440 million years ago. As a result of tectonics and the effect of ice, the sea level has risen and fallen. In every area of the country the rocks which formed can be seen as a result. Finally, the impact of the glaciers shaped the landscape seen today. The variation between the two areas, along with the differences between volcanic areas and shallow seas, led to a range of soils. There are extensive

bog A bog or bogland is a wetland that accumulates peat as a deposit of dead plant materials often mosses, typically sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, mosses, quagmire, and muskeg; a ...

s and free-draining brown earths. The mountains are

granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies un ...

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicat ...

limestone Limestone ( calcium carbonate ) 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 . Limestone forms w ...

with

karst Karst is a topography formed from the dissolution of soluble rocks such as limestone, Dolomite (rock), dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathe ...

areas, and

basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90 ...

formations. Most of Ireland was probably above sea level during the last 60 million years. As such its landscapes have been shaped by

erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is d ...

and

weathering Weathering is the deterioration of rocks, soils and minerals as well as wood and artificial materials through contact with water, atmospheric gases, and biological organisms. Weathering occurs '' in situ'' (on site, with little or no movement ...

on land. Protracted erosion also means most of the

Paleogene The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago ( Mya) to the beginning o ...

and

Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ...

sediments have been eroded away or, as known in a few cases, buried by

Quaternary The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million year ...

deposits. Before the

Quaternary glaciation The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describ ...

s affected Ireland the landscape had developed thick weathered

regolith Regolith () is a blanket of unconsolidated, loose, heterogeneous superficial deposits covering solid rock. It includes dust, broken rocks, and other related materials and is present on Earth, the Moon, Mars, some asteroids, and other terrestr ...

on the uplands and

in the lowlands. There has been some controversy regarding the origin of the

planation surface In geology and geomorphology a planation surface is a large-scale surface that is almost flat with the possible exception of some residual hills. The processes that form planation surfaces are labelled collectively planation and are exogenic (ch ...

s found in Ireland. While some have argued for an origin in marine planation others regard these surfaces as

peneplain 390px, Sketch of a hypothetical peneplain formation after an orogeny. In geomorphology and geology, a peneplain is a low-relief plain formed by protracted erosion. This is the definition in the broadest of terms, albeit with frequency the usage ...

s formed by weathering and

fluvial erosion In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluviogl ...

. Not only is their origin disputed but also their actual extent and the relative role of sea-level change and tectonics in their shaping. Most river systems in Ireland formed in the

Cenozoic The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configu ...

before the Quaternary glaciations. Rivers follow for most of their course

structural A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made objects such as buildings and machines and natural objects such ...

features of the geology of Ireland. Marine erosion since the

Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...

may have made Ireland's western coast retreat more than 100 km. Pre-Quaternary relief was more dramatic than today's glacier-smoothened landscapes.

Physical geography

Mountain ranges

Ireland consists of a mostly flat low-lying area in the Midlands, ringed by mountain ranges such as (beginning in County Kerry and working counter-clockwise) the

MacGillycuddy's Reeks , photo=MacGuillycuddy's Reeks.jpg , photo_caption= , country=Ireland , country1= , location = County Kerry , region = Munster , region_type = Provinces of Ireland , parent= , border= , length_km=19 , length_orientation=East–West ...

, Comeragh Mountains,

Blackstairs Mountains The Blackstairs Mountains ( ga, Na Staighrí Dubha) run roughly north/south along the border between County Carlow and County Wexford in Ireland Ireland ( ; ga, Éire ; Ulster-Scots: ) is an island in the North Atlantic Ocean, in no ...

Wicklow Mountains The Wicklow Mountains (, archaic: ''Cualu'') form the largest continuous upland area in the Republic of Ireland. They occupy the whole centre of County Wicklow and stretch outside its borders into the counties of Dublin, Wexford and Carlow ...

, the Mournes,

Glens of Antrim The Glens of Antrim,Logainm.ie
(

Sperrin Mountains The Sperrins or Sperrin Mountains () are a range of mountains in Northern Ireland and one of the largest upland areas in Northern Ireland. The range stretches from Strabane eastwards to Slieve Gallion in Desertmartin and north towards Limavad ...

Bluestack Mountains The Blue Stack Mountains or Bluestack Mountains, also called the Croaghgorms (), are the major mountain range in the south of County Donegal, Ireland. They provide a barrier between the south of the county, such as Donegal Town and Ballyshannon, a ...

Derryveagh Mountains The Derryveagh Mountains () are the major mountain range in County Donegal, Ireland. It makes up much of the landmass of the county and is the area of Ireland with the lowest population density. The mountains separate the coastal parts of the count ...

Ox Mountains The Ox Mountains or Slieve Gamph () are a mountain range in County Sligo on the west coast of Ireland. They are also known as Saint Patrick's Mountains after the saint who built churches on its slopes and left his name to some of its wells. Ge ...

, Nephinbeg Mountains and the

Twelve Bens , photo=Boats and mountains, Roundstone (6047965086).jpg , photo_caption= View of the range from Roundstone village. , region = Connacht , region_type = Provinces of Ireland , translation = The peaks of Beola , language = Irish language ...

Maumturks , photo=View south to Knocknahillion from Letterbreckaun.jpg , photo_caption= Maumturk Mountains: looking south from Letterbreckaun towards Knocknahillion and Binn idir an dá Log. , country=Republic of Ireland , region = Connacht , region_t ...

group. Some mountain ranges are further inland in the south of Ireland, such as the

Galtee Mountains Galtymore or Galteemore () is a mountain in the province of Munster, Ireland. At , it is one of Ireland's highest mountains, being the 12th-highest on the Arderin list, and 14th-highest on the Vandeleur-Lynam list. Galtymore has the 4th-highe ...

(the highest inland range), Silvermine and

Slieve Bloom Mountains The Slieve Bloom Mountains ( ga, Sliabh Bladhma; la, Bladinae montes) is a mountain range in Ireland. They rise from the central plain of Ireland to a height of 527 metres. While not very high, they are extensive by local standards. The high ...

. The highest peak

, at 1,038.6 m (3,407 ft) high, is in the MacGillycuddy's Reeks, a range of glacier-carved sandstone mountains. Only three peaks on the island are over 1,000 m (3,281 ft) and another 457 exceed 500 m (1,640 ft). Ireland is sometimes known as the "Emerald Isle" because of its green landscape.

Forests

Ireland, like the neighbouring Great Britain, was once covered in forest. Clearing of forests began in the Neolithic Age and accelerated following the Tudor Conquest, resulting in forest cover of only 1% by the start of the twentieth century. As of 2017, total tree cover in the Republic of Ireland stood at 11% of land area. The figure for native forest stood at 2% in 2018; the third lowest in Europe behind

Iceland Iceland ( is, Ísland; ) is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which (along with its ...

and

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

Rivers and lakes

The

, at in length, is the longest river in Ireland and Britain. With a drainage area of , the

Shannon River Basin The Shannon River Basin consists of the area containing Ireland, Ireland's longest river, the River Shannon, and all of its tributaries and lakes. The official Ordnance Survey Ireland length of the Shannon from its Shannon Pot source is made up o ...

covers one-fifth of the island. The Shannon crosses 11 counties and divides the west of Ireland from the south and east. The river develops into three large lakes along its course,

Lough Allen Lough Allen () is a lake on the River Shannon in northeastern Connacht, Ireland. Most of the lake is in County Leitrim, with a smaller part in County Roscommon. The lake lies to the south of the River Shannon's source, near the Iron Mountains, ...

Lough Ree Lough Ree () is a lake in the midlands of Ireland, the second of the three major lakes on the River Shannon. Lough Ree is the second largest lake on the Shannon after Lough Derg. The other two major lakes are Lough Allen to the north, and L ...

, and Lough Derg. The River Shannon enters the Atlantic Ocean at

city along the

Shannon Estuary The Shannon Estuary ( gle, Inbhear na Sionainne) is a large estuary where the River Shannon flows into the Atlantic Ocean. The estuary has Limerick City at its head and its seaward limits are marked by Loop Head to the north and Kerry Head to th ...

. Other major rivers include the

River Liffey The River Liffey ( Irish: ''An Life'', historically ''An Ruirthe(a)ch'') is a river in eastern Ireland that ultimately flows through the centre of Dublin to its mouth within Dublin Bay. Its major tributaries include the River Dodder, the Riv ...

River Lee The River Lee (Irish: ''An Laoi'') is a river in Ireland. It rises in the Shehy Mountains on the western border of County Cork and flows eastwards through Cork, where it splits in two for a short distance, creating an island on which Cork's ...

, River Blackwater,

River Nore The River Nore ( ga, An Fheoir ) is one of the principal rivers (along with the River Suir and River Barrow) in the South-East Region of Ireland. The river drains approximately of Leinster and Munster, that encompasses parts of three counti ...

River Suir The River Suir ( ; ga, an tSiúr or ''Abhainn na Siúire'' ) is a river in Ireland that flows into the Atlantic Ocean through Waterford after a distance of . The catchment area of the Suir is 3,610 km2.

River Barrow The Barrow ( ga, An Bhearú) is a river in Ireland. It is one of The Three Sisters; the other two being the River Suir and the River Nore. The Barrow is the longest of the three rivers, and at 192 km (120 mi), the second-longest ri ...

River Bann The River Bann (from ga, An Bhanna, meaning "the goddess"; Ulster-Scots: ''Bann Wattèr'') is one of the longest rivers in Northern Ireland, its length, Upper and Lower Bann combined, being 129 km (80 mi). However, the total lengt ...

River Foyle The River Foyle () is a river in west Ulster in the northwest of the island of Ireland, which flows from the confluence of the rivers Finn and Mourne at the towns of Lifford in County Donegal, Republic of Ireland, and Strabane in Co ...

River Erne The River Erne ( , ga, Abhainn na hÉirne or ''An Éirne'') in the northwest of the island of Ireland, is the second-longest river in Ulster, flowing through Northern Ireland and the Republic of Ireland, and forming part of their borde ...

, and

River Boyne The River Boyne ( ga, An Bhóinn or ''Abhainn na Bóinne'') is a river in Leinster, Ireland, the course of which is about long. It rises at Trinity Well, Newberry Hall, near Carbury, County Kildare, and flows towards the Northeast through C ...

, in Ulster, is the largest lake in Ireland and Britain with an area of . The largest lake in the

Lough Corrib Lough Corrib ( ; ) is a lake in the west of Ireland. The River Corrib or Galway River connects the lake to the sea at Galway. It is the largest lake within the Republic of Ireland and the second largest on the island of Ireland (after Lough Nea ...

. Other large lakes include

Lough Erne Lough Erne ( , ) is the name of two connected lakes in County Fermanagh, Northern Ireland. It is the second-biggest lake system in Northern Ireland and Ulster, and the fourth biggest in Ireland. The lakes are widened sections of the River Erne, ...

Lough Mask Lough Mask () is a limestone lake of about in Counties Mayo and Galway, Ireland, north of Lough Corrib. Lough Mask is the middle of the three lakes, which empty into the Corrib River, through Galway, into Galway Bay. Lough Carra flows into ...

and

Lough Conn Lough Conn () is a lake in County Mayo, Ireland. With an area of about , it is Ireland's seventh largest lake. With its immediate neighbour to the south, Lough Cullin, it is connected to the Atlantic Ocean by the River Moy. Lough Conn is noted ...

Inlets

In County Donegal,

Lough Swilly Lough Swilly () in Ireland is a glacial fjord or sea inlet lying between the western side of the Inishowen Peninsula and the Fanad Peninsula, in County Donegal. Along with Carlingford Lough and Killary Harbour it is one of three glacial fjords ...

separates the western side of the

Inishowen peninsula Inishowen () is a peninsula in the north of County Donegal in Ireland. Inishowen is the largest peninsula on the island of Ireland. The Inishowen peninsula includes Ireland's most northerly point, Malin Head. The Grianan of Aileach, a ringfort ...

Lough Foyle Lough Foyle, sometimes Loch Foyle ( or "loch of the lip"), is the estuary of the River Foyle, on the north coast of Ireland. It lies between County Londonderry in Northern Ireland and County Donegal in the Republic of Ireland. Sovereignty over ...

on the other side, is one of Ireland's larger inlets, situated between County Donegal and

County Londonderry County Londonderry ( Ulster-Scots: ''Coontie Lunnonderrie''), also known as County Derry ( ga, Contae Dhoire), is one of the six counties of Northern Ireland, one of the thirty two counties of Ireland and one of the nine counties of Ulster. ...

. Clockwise round the coast is

Belfast Lough Belfast Lough is a large, intertidal sea inlet on the east coast of Northern Ireland. At its head is the city and port of Belfast, which sits at the mouth of the River Lagan. The lough opens into the North Channel and connects Belfast to ...

, between County Antrim and County Down. Also in County Down is

Strangford Lough Strangford Lough (from Old Norse ''Strangr Fjörðr'', meaning "strong sea-inlet"PlaceNames N ...

, actually an inlet partially separating the

Ards peninsula The Ards Peninsula () is a peninsula in County Down, Northern Ireland, on the north-east coast of Ireland. It separates Strangford Lough from the North Channel of the Irish Sea. Towns and villages on the peninsula include Donaghadee, Mi ...

from the mainland. Further south,

Carlingford Lough Carlingford Lough (, Ulster Scots: ''Carlinford Loch'') is a glacial fjord or sea inlet in northeastern Ireland, forming part of the border between Northern Ireland to the north and the Republic of Ireland to the south. On its northern shore i ...

is situated between Down and

County Louth County Louth ( ; ga, An Lú) is a coastal Counties of Ireland, county in the Eastern and Midland Region of Republic of Ireland, Ireland, within the Provinces of Ireland, province of Leinster. Louth is bordered by the counties of County Meath, M ...

. Dublin Bay is the next sizeable inlet. The east coast of Ireland has no major inlets until

Wexford Harbour Wexford Harbour ( gle, Loch Garman) in County Wexford, Ireland is the natural harbour at the mouth of the River Slaney. In earlier times, the area occupied by the harbour was considerably larger than it is today, up to ten miles (16 km) wi ...

at the mouth of the

River Slaney The River Slaney () is a large river in the southeast of Ireland. It rises on Lugnaquilla Mountain in the western Wicklow Mountains and flows west and then south through counties Wicklow, Carlow and Wexford for 117.5 km (73 mi), be ...

. On the south coast,

Waterford Harbour Waterford Harbour ( gle, Loch Dá Chaoch / Cuan Phort Láirge) is a natural harbour at the mouth of the Three Sisters; the River Nore, the River Suir and the River Barrow in Ireland. It is navigable for shipping to both Waterford and New Ross ...

is situated at the mouth of the

(into which the other two of the Three Sisters (

and

) flow). The next major inlet is

Cork Harbour Cork Harbour () is a natural harbour and river estuary at the mouth of the River Lee in County Cork, Ireland. It is one of several which lay claim to the title of "second largest natural harbour in the world by navigational area" (after Port Ja ...

, at the mouth of the River Lee, in which

Great Island Great Island () is an island in Cork Harbour, at the mouth of the River Lee and close to the city of Cork, Ireland. The largest town on the island is Cobh (called Queenstown from 1849 to 1922). The island's economic and social history has histo ...

is situated.

Dunmanus Bay Dunmanus Bay is a bay in County Cork, Ireland. The bay lies between Mizen Head to the south and Sheep's Head to the north with the small village of Durrus at the head of the bay. The bay is out of the main tidal flow with no significant ri ...

, Kenmare estuary and Dingle Bay are all inlets between the peninsulas of

County Kerry County Kerry ( gle, Contae Chiarraí) is a county in Ireland. It is located in the South-West Region and forms part of the province of Munster. It is named after the Ciarraige who lived in part of the present county. The population of the co ...

. North of these is the

. Between north County Clare and County Galway is

Galway Bay Galway Bay ( Irish: ''Loch Lurgain'' or ''Cuan na Gaillimhe'') is a bay on the west coast of Ireland, between County Galway in the province of Connacht to the north and the Burren in County Clare in the province of Munster to the south; Galw ...

Clew Bay Clew Bay (; ga, Cuan Mó) is a natural ocean bay in County Mayo, Republic of Ireland. It contains Ireland's best example of sunken drumlins. The bay is overlooked by Croagh Patrick to the south and the Nephin Range mountains of North Mayo. Cla ...

is located on the coast of

County Mayo County Mayo (; ga, Contae Mhaigh Eo, meaning "Plain of the yew trees") is a county in Ireland. In the West of Ireland, in the province of Connacht, it is named after the village of Mayo, now generally known as Mayo Abbey. Mayo County Counci ...

, south of

Achill Island Achill Island (; ga, Acaill, Oileán Acla) in County Mayo is the largest of the Irish isles, and is situated off the west coast of Ireland. It has a population of 2,594. Its area is . Achill is attached to the mainland by Michael Davitt Brid ...

, while

Broadhaven Bay Broadhaven Bay ( ga, Cnocán na Líne) is a natural bay of the Atlantic Ocean on the northwestern coast of County Mayo, Ireland. The opening of the bay faces northward, stretching 8.6 km between Erris Head in the west and Kid Island/Oileá ...

Blacksod Bay Blacksod Bay ( ga, Cuan an Fhóid Duibh) is a bay of the Atlantic Ocean in Erris, north County Mayo, Ireland. The long and wide bay is bounded on its western side by the Mullet Peninsula. Its eastern side includes Kiltane Parish, which exten ...

and

Sruth Fada Conn Sruwaddacon Bay () is a tidal estuary which runs through the middle of the Gaeltacht Kilcommon parish in Erris, County Mayo, Ireland. It is of historical importance in Irish legend, an important marine habitat, an E.U. Special Area of Conservatio ...

bays are situated in northwest Connacht, in North Mayo.

Killala Bay Killala Bay ( ga, Cuan Chill Ala) is a bay on the west coast of Ireland between County Mayo and County Sligo. It is situated between Kilcummin Head to the west and Lenadoon Point to the east. and is the estuary for the River Moy. The village of ...

is on the northeast coast of Mayo.

Donegal Bay Donegal Bay (''Bá Dhún na nGall'' in Irish) is an inlet (or bay) in the northwest of Ireland. Three counties – Donegal to the north and west, Leitrim and Sligo to the south – have shorelines on the bay, which is bounded on the w ...

is a major inlet between County Donegal and

County Sligo County Sligo ( , gle, Contae Shligigh) is a county in Ireland. It is located in the Border Region and is part of the province of Connacht. Sligo is the administrative capital and largest town in the county. Sligo County Council is the local ...

. A recent global remote sensing analysis suggested that there were 565km² of tidal flats in Ireland, making it the 43rd ranked country in terms of tidal flat area.

Headlands

Malin Head Malin Head ( ga, Cionn Mhálanna) is the most northerly point of mainland Ireland, located in the townland of Ardmalin on the Inishowen peninsula in County Donegal. The head's northernmost point is called Dunalderagh at latitude 55.38ºN. It ...

is the most northerly point in Ireland, while Mizen Head is one of the most southern points, hence the term "from Malin to Mizen" (or the reverse) is used for anything applying to the island of Ireland as a whole.

Carnsore Point Carnsore Point ( or ''Ceann an Chairn'') is a headland in the very South East corner of County Wexford, Ireland. This headland is Ireland's southern limit point of the Irish Sea, on the western side of St George's Channel. Ptolemy's ''Geography ...

is another extreme point of Ireland, being the southeasternmost point of Ireland.

Hook Head Hook Head (), historically called Rindowan, is a headland in County Wexford, Ireland, on the east side of the estuary of The Three Sisters (Rivers Nore, Suir and Barrow). It is part of the Hook peninsula and is adjacent to the historic townl ...

and the

Old Head of Kinsale The Old Head of Kinsale () is a headland near Kinsale, County Cork, Ireland. A castle has been on the headland since at least the 3rd century, with the current iteration built in 1223. An early lighthouse was established here in the 17th centur ...

are two of many headlands along the south coast.

Loop Head Loop Head (), is a headland on the north side of the mouth of the River Shannon, in County Clare in the west of Ireland. Loop Head is marked by a prominent lighthouse. The opposite headland on the south side of the Shannon is Kerry Head. The ...

is the headland at which County Clare comes to a point on the west coast of Ireland, with the Atlantic on the north, and the Shannon estuary to the south.

Hag's Head Hag's Head is the name given to the most southerly point of the Cliffs of Moher in County Clare, Ireland, where the cliffs form an unusual rock formation that resembles a woman's head looking out to sea. It provides a vantage point over m ...

is another headland further up Clare's north/western coastline, with the

Cliffs of Moher The Cliffs of Moher (; ) are sea cliffs located at the southwestern edge of the Burren region in County Clare, Ireland. They run for about . At their southern end, they rise above the Atlantic Ocean at Hag's Head, and, to the north, they ...

along the coastline north of the point.

Erris Head Erris Head (Irish: ''Ceann Iorrais'') is a promontory at the northernmost tip of the Mullet Peninsula, located in the barony of Erris in northwest County Mayo, Ireland. It is a well known and recognised landmark used by mariners and weather ...

is the northwesternmost point of

Connacht Connacht ( ; ga, Connachta or ), is one of the provinces of Ireland, in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms ( Uí Fiachrach, Uí Briúin, Uí Maine, Conmhaícne, and ...

Islands and peninsulas

Apart from Ireland itself, Achill Island to its northwest is now considered the largest island in the group. The island is inhabited, and is connected to the mainland by a bridge. Some of the next largest islands are the

Aran Islands The Aran Islands ( ; gle, Oileáin Árann, ) or The Arans (''na hÁrainneacha'' ) are a group of three islands at the mouth of Galway Bay, off the west coast of Ireland, with a total area around . They constitute the historic barony of Aran i ...

, off the coast of southern

, host to an Irish-speaking community, or

Gaeltacht ( , , ) are the districts of Ireland, individually or collectively, where the Irish government recognises that the Irish language is the predominant vernacular, or language of the home. The ''Gaeltacht'' districts were first officially reco ...

Valentia Island Valentia Island () is one of Ireland's most westerly points. It lies off the Iveragh Peninsula in the southwest of County Kerry. It is linked to the mainland by the Maurice O'Neill Memorial Bridge at Portmagee. A car ferry also departs from ...

off the

Iveragh peninsula The Iveragh Peninsula () is located in County Kerry in Ireland. It is the largest peninsula in southwestern Ireland. A mountain range, the MacGillycuddy's Reeks, lies in the centre of the peninsula. Carrauntoohil, its highest mountain, is als ...

is also one of Ireland's larger islands, and is relatively settled, as well as being connected by a bridge at its southeastern end.

Omey Island Omey Island ( ga, Iomaidh) is a tidal island situated near Claddaghduff on the western edge of Connemara in County Galway, Ireland. From the mainland the island is almost hidden. It is possible to drive or walk across a large sandy strand to t ...

, off the coast of

Connemara Connemara (; )( ga, Conamara ) is a region on the Atlantic coast of western County Galway, in the west of Ireland. The area has a strong association with traditional Irish culture and contains much of the Connacht Irish-speaking Gaeltacht, ...

is a

tidal island A tidal island is a piece of land that is connected to the mainland by a natural or man-made causeway that is exposed at low tide and submerged at high tide. Because of the mystique surrounding tidal islands, many of them have been sites of ...

. Some of the best-known peninsulas in Ireland are in County Kerry; the

Dingle peninsula The Dingle Peninsula ( ga, Corca Dhuibhne; anglicised as Corkaguiny, the name of the corresponding barony) is the northernmost of the major peninsulas in County Kerry. It ends beyond the town of Dingle at Dunmore Head, the westernmost point ...

, the Iveragh peninsula and the

Beara peninsula Beara ( ga, Béarra) or the Beara Peninsula is a peninsula on the south-west coast of Ireland, bounded between the Kenmare "river" (actually a bay) to the north side and Bantry Bay to the south. It contains two mountain ranges running down it ...

. The

is one of the larger peninsulas outside Kerry. The

peninsula in County Donegal includes Ireland's most northerly point, Malin Head and several important towns including

Buncrana Buncrana ( ; ) is a town in County Donegal, Ireland. It is beside Lough Swilly on the Inishowen peninsula, northwest of Derry and north of Letterkenny. In the 2016 census, the population was 6,785 making it the second most populous town in ...

Carndonagh Carndonagh (; ) is a town on the Inishowen peninsula in County Donegal, Ireland, close to Trawbreaga Bay. It is the site of the Donagh Cross (or St. Patrick's Cross), believed to date to the 7th century. The Irish name, ''Carn Domhnach'', mea ...

and

Moville Moville (; ) is a coastal town located on the Inishowen Peninsula of County Donegal, Ireland, close to the northern tip of the island of Ireland. It is the first coastal town of the Wild Atlantic Way when starting on the northern end. Locatio ...

. Ireland's most northerly land feature is Inishtrahull island, off Malin Head.

Rockall Rockall () is an uninhabitable granite islet situated in the North Atlantic Ocean. The United Kingdom claims that Rockall lies within its exclusive economic zone (EEZ) and is part of its territory, but this claim is not recognised by Ireland ...

Island may deserve this honour but its status is disputed, being claimed by the United Kingdom, Republic of Ireland,

Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of Denmark , establish ...

(for the

Faroe Islands The Faroe Islands ( ), or simply the Faroes ( fo, Føroyar ; da, Færøerne ), are a North Atlantic island group and an autonomous territory of the Kingdom of Denmark. They are located north-northwest of Scotland, and about halfway bet ...

) and

. The most southerly point is the

Fastnet Rock Fastnet Lighthouse is a 54m high lighthouse situated on the remote Fastnet Rock in the Atlantic Ocean. It is the most southerly point of Ireland and lies southwest of Cape Clear Island and from County Cork on the Irish mainland. The current l ...

. The

Hebrides The Hebrides (; gd, Innse Gall, ; non, Suðreyjar, "southern isles") are an archipelago off the west coast of the Scottish mainland. The islands fall into two main groups, based on their proximity to the mainland: the Inner and Outer Hebri ...

off

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to ...

and

Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ...

off

Wales Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in ...

were grouped with Ireland ("

Hibernia ''Hibernia'' () is the Classical Latin name for Ireland. The name ''Hibernia'' was taken from Greek geographical accounts. During his exploration of northwest Europe (c. 320 BC), Pytheas of Massalia called the island ''Iérnē'' (written ). ...

") by the Greco-

Roman Roman or Romans most often refers to: * Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of ancient Rome *''Epistle to the Romans'', shortened to ''Romans'', a lett ...

geographer A geographer is a physical scientist, social scientist or humanist whose area of study is geography, the study of Earth's natural environment and human society, including how society and nature interacts. The Greek prefix "geo" means "earth" a ...

Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

, but this is no longer common.

Climate

The climate of Ireland is mild, humid and changeable with abundant

rainfall Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water f ...

and a lack of temperature extremes.

Ireland Ireland ( ; ga, Éire ; Ulster-Scots: ) is an island in the North Atlantic Ocean, in north-western Europe. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the s ...

's climate is defined as a

temperate In geography, the temperate climates of Earth occur in the middle latitudes (23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout ...

oceanic climate An oceanic climate, also known as a marine climate, is the humid temperate climate sub-type in Köppen classification ''Cfb'', typical of west coasts in higher middle latitudes of continents, generally featuring cool summers and mild winters ...

, or ''Cfb'' on the

Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, nota ...

system, a classification it shares with most of northwest Europe. The country receives generally warm summers and mild winters. It is considerably warmer than other areas at the same

latitude In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north ...

on the other side of the Atlantic, such as in

Newfoundland Newfoundland and Labrador (; french: Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region ...

, because it lies downwind of the Atlantic Ocean. It is also warmer than maritime climates near the same latitude, such as the

Pacific Northwest The Pacific Northwest (sometimes Cascadia, or simply abbreviated as PNW) is a geographic region in western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Thou ...

as a result of heat released by the Atlantic overturning circulation that includes the

North Atlantic Current The North Atlantic Current (NAC), also known as North Atlantic Drift and North Atlantic Sea Movement, is a powerful warm western boundary current within the Atlantic Ocean that extends the Gulf Stream northeastward. The NAC originates from where ...

and

Gulf Stream The Gulf Stream, together with its northern extension the North Atlantic Drift, is a warm and swift Atlantic ocean current that originates in the Gulf of Mexico and flows through the Straits of Florida and up the eastern coastline of the Unit ...

. For comparison,

Dublin Dublin (; , or ) is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2016 ...

is 9 °C warmer than St. John's in Newfoundland in winter and 4 °C warmer than

Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region o ...

in the Pacific Northwest in winter. The influence of the North Atlantic Current also ensures the coastline of Ireland remains ice-free throughout the winter. The climate in Ireland does not experience extreme weather, with tornadoes and similar weather features being rare. However, Ireland is prone to eastward moving cyclones which come in from the North Atlantic. The prevailing wind comes from the southwest, breaking on the high mountains of the west coast. Rainfall is therefore a particularly prominent part of western Irish life, with

, off the west coast of

, getting over twice as much annual rainfall as Dublin on the east ( vs. ). January and February are the coldest months of the year, and mean daily air temperatures fall between during these months. July and August are the warmest, with mean daily temperatures of , whilst mean daily maximums in July and August vary from near the coast, to inland. The sunniest months are May and June, with an average of five to seven hours sunshine per day. Though extreme weather events in Ireland are comparatively rare when compared with other countries in the European Continent, they do occur. Atlantic depressions, occurring mainly in the months of December, January and February, can occasionally bring winds of up to to Western coastal counties; while the summer months, and particularly around late July/early August, thunderstorms can develop. The tables below show mean 30-year climate averages for Ireland's two largest cities, taken from the weather stations at

Dublin Airport Dublin Airport ( Irish: ''Aerfort Bhaile Átha Cliath'') is an international airport serving Dublin, Ireland. It is operated by DAA (formerly Dublin Airport Authority). The airport is located in Collinstown, north of Dublin, and south o ...

and

Belfast International Airport Belfast International Airport is an airport northwest of Belfast in Northern Ireland, is the main airport for the city of Belfast. Until 1983, it was known as ''Aldergrove Airport'', after the nearby village of Aldergrove. In 2018, over 6.2 ...

respectively. The state metrological service for the Republic of Ireland is

Met Éireann Met Éireann (; meaning " Met of Ireland") is the state meteorological service of Ireland, part of the Department of Housing, Local Government and Heritage. History The history of modern meteorology in Ireland dates back to 8 October 1860, whe ...

, while the

Met Office The Meteorological Office, abbreviated as the Met Office, is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy and is led by CEO Penelop ...

monitors climate data for Northern Ireland.

Political and human geography

Ireland is divided into four

provinces A province is almost always an administrative division within a country or state. The term derives from the ancient Roman '' provincia'', which was the major territorial and administrative unit of the Roman Empire's territorial possessions ou ...

Leinster Leinster ( ; ga, Laighin or ) is one of the provinces of Ireland, situated in the southeast and east of Ireland. The province comprises the ancient Kingdoms of Meath, Leinster and Osraige. Following the 12th-century Norman invasion of ...

Munster Munster ( gle, an Mhumhain or ) is one of the provinces of Ireland, in the south of Ireland. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" ( ga, rí ruirech). Following t ...

and

, and 32

counties A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...

. Six of the nine Ulster counties form Northern Ireland and the other 26 form the state, Ireland. The map shows the county boundaries for all 32 counties. From an administrative viewpoint, 21 of the counties in the Republic are units of local government. The other six have more than one local council area, resulting in a total of 31 county-level authorities.

County Tipperary County Tipperary ( ga, Contae Thiobraid Árann) is a county in Ireland. It is in the province of Munster and the Southern Region. The county is named after the town of Tipperary, and was established in the early 13th century, shortly after ...

had two ridings,

North Tipperary North Tipperary ( ga, Tiobraid Árann Thuaidh) was a county in Ireland. It was part of the Mid-West Region and was also located in the province of Munster. It was named after the town of Tipperary and consisted of 48% of the land area of ...

and

South Tipperary South Tipperary ( ga, Tiobraid Árann Theas) was a county in Ireland. It was part of the South-East Region and was also located in the province of Munster. It was named after the town of Tipperary and consisted of 52% of the land area of t ...

, originally established in 1838, renamed in 2001 and amalgamated in 2014. The cities of Dublin,

Cork Cork or CORK may refer to: Materials * Cork (material), an impermeable buoyant plant product ** Cork (plug), a cylindrical or conical object used to seal a container ***Wine cork Places Ireland * Cork (city) ** Metropolitan Cork, also known as G ...

and

Galway Galway ( ; ga, Gaillimh, ) is a City status in Ireland, city in the West Region, Ireland, West of Ireland, in the Provinces of Ireland, province of Connacht, which is the county town of County Galway. It lies on the River Corrib between Lo ...

have city councils and are administered separately from the counties bearing those names. The cities of

and

Waterford "Waterford remains the untaken city" , mapsize = 220px , pushpin_map = Ireland#Europe , pushpin_map_caption = Location within Ireland##Location within Europe , pushpin_relief = 1 , coordinates ...

were merged with their respective county councils in 2014 to form new city and county councils. The remaining part of

County Dublin "Action to match our speech" , image_map = Island_of_Ireland_location_map_Dublin.svg , map_alt = map showing County Dublin as a small area of darker green on the east coast within the lighter green background of ...

is divided into

Dún Laoghaire–Rathdown , image_map = Island of Ireland location map Dun Laoghaire–Rathdown.svg , area_total_km2 = 125.8 , area_footnotes = , seat_type = County town , seat = Dún Laoghaire , blank_name_sec1 = Vehicle indexmark ...

Fingal Fingal ( ; ) is a county in Ireland. It is located in the province of Leinster and is part of the Eastern and Midland Region. It is one of three successor counties to County Dublin, which was disestablished for administrative purposes in 1994. ...

, and

South Dublin , image_map = Island of Ireland location map South Dublin.svg , map_caption = Inset showing South Dublin (darkest green in inset) within Dublin Region (lighter green) , area_total_km2 ...

. Electoral areas in Ireland (the state) are called constituencies in accordance with

Irish law Law of Ireland or Irish law may refer to: * Early Irish law (Brehon law) of Medieval Ireland * Alternative law in Ireland prior to 1921 * Law of the Republic of Ireland The law of Ireland consists of constitutional, statute, and common law. ...

, mostly follow county boundaries. Maintaining links to the county system is a mandatory consideration in the re-organisation of constituency boundaries by a Constituency Commission. In Northern Ireland, a major re-organisation of local government in 1973 replaced the six traditional counties and two

county borough County borough is a term introduced in 1889 in the United Kingdom of Great Britain and Ireland, to refer to a borough or a city independent of county council control, similar to the unitary authorities created since the 1990s. An equivalent te ...

s (

Belfast Belfast ( , ; from ga, Béal Feirste , meaning 'mouth of the sand-bank ford') is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdom ...

and

Derry Derry, officially Londonderry (), is the second-largest city in Northern Ireland and the fifth-largest city on the island of Ireland. The name ''Derry'' is an anglicisation of the Old Irish name (modern Irish: ) meaning 'oak grove'. The ...

) by 26 single-tier

districts A district is a type of administrative division that, in some countries, is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or counties, several municipalities, subdivisions ...

, which, apart from Fermanagh cross the traditional county boundaries. The six counties and two county-boroughs remain in use for purposes such as

Lieutenancy A lord-lieutenant ( ) is the British monarch's personal representative in each lieutenancy area of the United Kingdom. Historically, each lieutenant was responsible for organising the county's militia. In 1871, the lieutenant's responsibility ...

. In November 2005, proposals were announced which would see the number of local authorities reduced to seven. The island's total population of nearly 7 million people is concentrated in the east and south, particularly in Dublin, Belfast, Cork and their surrounding areas.

Natural resources

Bogs

Ireland has 12,000 km² (about 4,600 sq miles) of

land, consisting of two distinct types: blanket bogs and raised bogs. Blanket bogs are the more widespread of the two types. They are essentially a product of human activity aided by the moist Irish climate. Blanket bogs formed on sites where

Neolithic The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several pa ...

farmers cleared trees for farming. As the land so cleared fell into disuse, the soil began to leach and become more acidic, producing a suitable environment for the growth of heather and rushes. The debris from these plants accumulated and a layer of

peat Peat (), also known as turf (), is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. The peatland ecosystem covers and ...

formed. One of the largest expanses of Atlantic blanket bog in Ireland is to be found in

. Raised bogs are most common in the Shannon basin. They formed when depressions left behind after the ice age filled with water to form lakes. Debris from reeds in these lakes formed a layer of at the bottom of the water. This eventually choked the lakes and raised above the surface, forming raised bogs. Since the 17th century, peat has been cut for fuel for domestic heating and cooking, and it is called turf when so used. The process accelerated as commercial exploitation of bogs grew. In the 1940s, machines for cutting turf were introduced and larger-scale harvesting became possible. In the Republic, this became the responsibility of a semi-state company called

Bord na Móna Bord na Móna (; English: "The Peat Board"), is a semi-state company in Ireland, created in 1946 by the Turf Development Act 1946. The company began developing the peatlands of Ireland with the aim to provide economic benefit for Irish Midland ...

. In addition to domestic uses, commercially extracted turf is used in a number of industries, producing peat briquettes for domestic fuel and milled peat for electricity generation. More recently peat is being combined with

biomass Biomass is plant-based material used as a fuel for heat or electricity production. It can be in the form of wood, wood residues, energy crops, agricultural residues, and waste from industry, farms, and households. Some people use the terms bio ...

for dual-firing electricity generation. In recent years, the destruction of bogs has raised environmental concerns. The issue is particularly acute for raised bogs which were more widely mined as they yield a higher-grade fuel than blanket bogs. Plans are now in place in both the Republic and Northern Ireland to conserve most of the remaining raised bogs on the island.

Oil, natural gas, renewables and minerals

Offshore exploration for natural gas began in 1970.Shannon, Corcoran & Haughton (2001), ''The petroleum exploration of Ireland's offshore basins: introduction'', Geological Society, London Lyell Collection—Special Publications, p 2 The first major discovery was the

Kinsale Head gas field The Kinsale Head gas field is a depleted offshore natural gas field in the Celtic Sea, located off the southern coast of County Cork, Ireland. Discovered in 1971 near the Old Head of Kinsale, it met Ireland's gas needs until 1996. The gas fiel ...

in 1971. Next were the smaller Ballycotton gas field in 1989, and the Corrib gas field in 1996. Gas from these fields is pumped ashore and used for both domestic and industrial purposes. The Helvick oil field, estimated to contain over of oil, was discovered in 2000, and

Barryroe ''Barryroe'' is an undeveloped oil and gas field discovered in the Atlantic ocean due south of County Cork, Ireland. Close to the exhausted Kinsale Head gas field, it is as close as to the Kinsale Head existing pipeline. The discovery is at a ...

, estimated to contain 1.6 billion barrels (250,000,000 m3) of oil, was discovered in 2012, although neither have been exploited. Ireland is the largest European producer of

zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...

, with one zinc-lead mine currently in operation at Tara, which is Europe's largest and deepest active mine. Other mineral deposits with actual or potential commercial value include gold, silver,

gypsum Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywa ...

talc Talc, or talcum, is a clay mineral, composed of hydrated magnesium silicate with the chemical formula Mg3Si4O10(OH)2. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent a ...

calcite Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratc ...

dolomite Dolomite may refer to: *Dolomite (mineral), a carbonate mineral *Dolomite (rock), also known as dolostone, a sedimentary carbonate rock *Dolomite, Alabama, United States, an unincorporated community *Dolomite, California, United States, an unincor ...

, roofing

slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. ...

aggregate,

building stone Building material is material used for construction. Many naturally occurring substances, such as clay, rocks, sand, wood, and even twigs and leaves, have been used to construct buildings. Apart from naturally occurring materials, many man- ...

sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class ...

and

gravel Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classifi ...

. In May 2007 the Department of Communications, Marine and Natural Resources (now replaced by the

Department of Communications, Energy and Natural Resources The Department of the Environment, Climate and Communications ( ga, An Roinn Comhshaoil, Aeráide agus Cumarsáide) is a department of the Government of Ireland that is responsible for the telecommunications and broadcasting sectors and regula ...

) reported that there may be volumes over of petroleum and of natural gas in Irish waters – worth trillions of

Euro The euro ( symbol: €; code: EUR) is the official currency of 19 out of the member states of the European Union (EU). This group of states is known as the eurozone or, officially, the euro area, and includes about 340 million citizens . ...

, if true. The minimum confirmed amount of oil in the Irish Atlantic waters is , worth over €450 billion. There are also areas of petroleum and natural gas on shore, for example the

basin, with of gas and of oil, valued at €74.4 billion. Already some fields are being exploited, such as the Spanish Point field, with of gas and of oil, valued at €19.6 billion. The Corrib Basin is also quite large, worth anything up to €87 billion, while the Dunquin gas field, initially estimated to have of natural gas and of petroleum but 2012 revised estimates suggest only of natural gas and barrels of oil condensate. In March 2012 the first commercial oil well was drilled 70 km off the Cork coast by Providence Resources. The Barryroe oil well is yielding 3500 barrels per day; at current oil prices of $120 a barrel Barryroe oil well is worth in excess of €2.14bn annually.

Notes

References

Bibliography

Print

*Mitchell, Frank and Ryan, Michael. ''Reading the Irish landscape'' (1998). *Whittow, J. B. ''Geography and Scenery in Ireland'' (Penguin Books 1974) *Holland, Charles, H and Sanders, Ian S. ''The Geology of Ireland'' 2nd ed. (2009). * ''Place-names'', Diarmuid O Murchadha and Kevin Murray, in ''The Heritage of Ireland'', ed. N. Buttimer et al., The Collins Press, Cork, 2000, pp. 146–155. * ''A paper landscape:the Ordnance Survey in nineteenth-century Ireland'', J.H. Andrews, London, 1975 * ''Monasticon Hibernicum'', M. Archdall, 1786 * ''Etymological aetiology in Irish tradition'', R. Baumgarten, ''Eiru'' 41, pp. 115–122, 1990 * ''The Origin and History of Irish names of Places'', Patrick Weston Joyce, three volumes, Dublin, 1869, 1875, 1913. * ''Irish Place Names'', D. Flanagan and L. Flanagan, Dublin, 1994 * ''Census of Ireland:general alphabetical index to the townlands and towns, parishes and paronies of Ireland'', Dublin, 1861 * ''The Placenames of Westmeath'', Paul Walsh (priest), Paul Walsh, 1957 * ''The Placenames of Decies'', P. Power, Cork, 1952 * ''The place-names of county Wicklow'', Liam Price, seven volumes, Dublin, 1945–67

Online

*Abbot, Patrick
Ireland's Peat Bogs
Retrieved on 23 January 2008.
Ireland
– The World Factbook. Central Intelligence Agency. Retrieved on 23 January 2008.
OnlineWeather.com
– climate details for Ireland. Retrieved 2011-01-12

External links

OSI FAQ
– lists of the longest, highest and other statistics * A discussion on RTÉ Radio 1's science show ''Quantum Leap'' about the quality of GPS mapping in Ireland is available
here
(archived link). The discussion starts 8mins 17sec into the show. It was aired o

(archived link). Requires RealPlayer. {{DEFAULTSORT:Geography Of Ireland Geography of Ireland,