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Ring of Gullion, Crossmaglen

Categories: Geologic Formations, Historic Walking Areas, Nature & Parks, Tourist Spots
Inspirock Rating:
4.3/5 based on 85+ reviews on the web
The Ring of Gullion is a geological formation and area, officially designated as an Area of Outstanding Natural Beauty, (AONB) located in County Armagh, Northern Ireland. The area centres on Slieve Gullion, the highest peak in County Armagh, measures roughly 42 by 18 kilometres (26 by 11 mi) and comprises some 150 kmĀ² defined topographically by the hills of an ancient ring dyke. Parts of the area have also been officially listed as Areas of Special Scientific Interest.The geological formation was the first ring dyke to be mapped, although its significance was not understood until similar structures had been described from Scotland. It was emplaced during the Paleogene opening of the Atlantic Ocean during the formation of the North Atlantic Igneous Province.Geological history and featuresThe structure of the ring dyke was produced when the active volcano's caldera underwent collapse producing a concentric suite of faults providing space into which magma was able to intrude. The ring dyke is composite with both porphyritic granophyre and porphyritic felsite components. The composition of the remainder of the volcano today is dominated by gabbro and granophyre and is also the site of a noted occurrence of platinum group elements.
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  • It's difficult to believe that less than 20 years ago this geological gem was virtually inaccessible to the public. South Armagh was an inhospitable area, it's rugged peaks topped by military watchtow...  read more »
  • I visited the forest park and also walk Slieve Guillion. The park is wonderful for families, designed with imagination working with nature. Wonderful place of beauty steeped in ancient history. 
  • Went here on bank holiday Monday. Leprechaun greeted us at the gates and this created an initial good impression. But it didn't last long. We arrived and the car in front was let through the open barr...  read more »
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