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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 the town of Bushmills.
An area of particular note is the Giant's Causeway on the north coast, a mainly basalt formation caused by volcanic activity between 50 and 60 million years ago. [21] The basalts were originally part of the great Thulean Plateau formed during the Paleogene period. [22]
Basalt columns seen on Porto Santo Island, Portugal. Columnar jointing of volcanic rocks exists in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern Ireland, in which the vertical joints form polygonal columns and give the impression of having been artificially constructed.
Columnar jointing in Giant's Causeway in Northern Ireland Columnar jointing in the Alcantara Gorge, Sicily. Columnar jointing is a geological structure where sets of intersecting closely spaced fractures, referred to as joints, result in the formation of a regular array of polygonal prisms (basalt prisms), or columns.
Susanna Drury, later Susanna Warter [1] (c. 1698 – c. 1770) was an Irish painter. Though little is known of her life or work, she was very influential in the development of Irish landscape painting.
They are much higher in places than those at Staffa and the Giant's Causeway, but similar in that they were formed by the slow cooling of volcanic rocks deep underground. [3] [9] Intrusive sills exhibit a progression in their chemical compositions, from olivine-rich rocks at the base, to rocks with very little or no olivine at the top.
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The Giant's Causeway Tramway, operated by the Giant's Causeway, Portrush and Bush Valley Railway & Tramway Company Ltd, was a pioneering 3 ft (914 mm) narrow gauge electric railway operating between Portrush and the Giant's Causeway. 9 + 1 ⁄ 4 miles (14.9 km) long, it was hailed at its opening as "the first long electric tramway in the world ...