2020
J0220 : Summit path, Slieve Gullion
taken 4 years ago, 5 km N of Forkhill, Co Armagh, Northern Ireland
Summit path, Slieve Gullion
Ring of Gullion
The Slieve Gullion ring dyke was formed some 400 million years ago as the result of a catastrophic volcanic explosion. This destroyed the central volcano leaving behind a circle of hills radiating around the main caldera.
Link
Link