Slemish is the remains of the plug of an extinct volcano. The plug is made of olivine dolerite [4] and was formed during the Palaeogene period of the Earth's geological history. [5]

The Giant's Causeway (Irish: Clochán an Aifir) [1] is an area of approximately 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption. [3][4] It is located in County Antrim on the north coast of Northern Ireland, about three miles (4.8 km) northeast of …

Oct 9, 2016 · in Antrim is the result of surface volcanic activity alone. The complex consists of jointed rhyolite lavas (rare in N.I.) and associated volcanic vent rocks including obsidian, tuffs and agglomerate.

Jan 27, 2025 · Just a cursory glance at the distinct shape of Slemish Mountain will tell you that it’s actually the central core of an extinct volcano. Located in County Antrim, it rises to an elevation of 437 m (1,434 ft) and can be seen for miles around due …

Slemish Mountain, the legendary first known Irish home of Saint Patrick, is located in County Antrim. The mountain rises about 1500 feet (437 metres) above the surrounding plain, and it is actually the central core of an extinct volcano.

Nov 10, 2016 · Consisting of the remains of a long-extinct volcano, Slemish Mountain dominates the County Antrim landscape. The mountain likewise casts a long shadow in the cultural landscape of Ireland,...

Scawt Hill is a volcanic plug in County Antrim, Northern Ireland, in the borough of Larne, 5 km from the village of Ballygally. [1] It gets its name from the Ulster Scots " scawd" meaning scaly, scabby or rugged. [2] Alternatively, 'scawt' meaning scruffy and contemptible, and when applied to rocks, covered in barnacles. [3]

Jun 21, 2024 · Ireland has a number of extinct volcanoes, including Slieve Gullion in County Armagh, Croghan Hill in County Offaly, Mount Slemish in County Antrim, Lambay Island in Dublin, and Loch Na Fooey in County Galway.

Slemish Mountain is located in Northern Ireland, in County Antrim. This ancient volcano, now extinct, is impossible to miss: the only mountain formation in the area, its steep slopes are easily recognizable!

Mar 23, 2020 · From a glacial lake in Galway to a private island in the Irish Sea, here are five extinct volcanoes in Ireland that now make for epic hikes. 5. Croghan Hill, County Offaly – short hikes with scenic views. 4. Slemish Mountain, County Antrim – open all year round. 3. Lambay Island, County Dublin – prison camp turned private island. 2.