Upcoming events See all events. Book your timed entry to visit Giant's Causeway. Tales of spooky shores Fri 29 Oct Join Keith for a special Halloween tour this Half-term weekend to hear spooky stories of lost spirits of the Causeway Coast.
Six must-see sights. The Blue Trail. The Red Trail. The Runkerry Trail. Some of the gift collection at the Giant's Causeway. Find out more. Apple and blackcurrant flapjacks Sally James. A giant move: Grazing returned to world-famous causeway to boost struggling wildlife.
Meadow Musings - Why are wildflowers so important? Was the Giant's Causeway built for love? A celebration of Knowing Your Home.
Our Work. General Family Access. Family Guided tours with our award winning storytellers run every hour for Visitor Experience ticket holders The Green Trail is pushchair suitable and the most family-friendly of our trails Dogs on leads welcome in all areas, including within the Visitor Centre and on guided tours.
Telephone Email giantscauseway nationaltrust. Directions via Google Maps. Visitors travelling this way receive a 'green discount' at admission to Visitor Centre Cycle route information On foot If you prefer to go by foot the Causeway Coast Way is a breathtaking mile stretch of Ireland's most celebrated coastline.
This is thought to be caused by water seeping into cracks as they were forming, accelerating cooling and disrupting large colonnade formation in the upper and middle sections. Following the outpouring and cooling of each of these lava flows, a period of inactivity allowed the topmost section of the basalt to be exposed to intense, persistent tropical weathering, forming a soil rich in iron and aluminium, called laterite.
Laterites form by the leaching of the parent rock during the wet season, the resulting solution is brought to the surface during the dry season and removed, progressively depleting the soil of easily dissolved ions such as sodium, potassium, calcium and magnesium, leaving behind the more insoluble elements such as aluminium and iron oxides.
Laterite formation occurs on the surfaces of the basalt that are in contact with water; on the surface and within cracks in the rock. These cycles are spectacularly displayed in the amphitheatre shaped cliffs in the image above, from the iconic stepping stones of the middle basalts, through the distinct red layer of the laterite and into the columns of the upper basalts.
Skip to content. Geology Of The Giants Causeway. It is the iron oxides that give this soil its characteristic brick-red colour. Share this post. Share on facebook. Share on google. Share on twitter. Share on linkedin. Share on pinterest. Share on print. Share on email. I guess it is not reached by many visitors of the Causeway, but geologically it is very interesting outcrop because here one can see the whole sequence of regular columns and curvi-columnar section directly above it.
But if distance to the surface were the cause, why would there be such a sharp transition from regular columns to the irregular mass above? Has anyone speculated? We have wondered about the similar situation at Devils Tower in Wyoming, e. Thanks for a VERY good photo essay!
The Causeway is a spectacular formation. You used an ink pen for scale and that was very helpful. Good job! Hollis, I do not know for sure but it could be water that intrudes the upper part and modifies the cooling process. June 19, at June 20, at Erich Gaiman. May 14, at
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