Loughshinny is a village in Ireland, about 15 km north of Dublin. This place has a very nice exposure of folded sediments from the late Carboniferous¹.

Folded cliff is easy to access but one should really take care to visit the place during low tide. It was high tide when I first arrived to the scene. As you can see, it was hard to take a good photo without getting very wet:

http://picasaweb.google.com/107509377372007544953/Rocks#5805178655900228274
Folds are really spectacular. They have angular hinges and northern limbs are overturned. The mountain building event that is responsible for this deformation is the Variscan orogeny.
http://picasaweb.google.com/107509377372007544953/Rocks#5805178645688019154
Folded sediments are turbidites. Dark layers represent fine-grained mudstone. Lighter layers are somewhat coarser. The whole sequence is calcareous, there are many calcite veins cross-cutting it.
http://picasaweb.google.com/107509377372007544953/Ireland#5758425855166713266
I left the folds at Loughshinny to see other places but I really wanted to take a better picture and see more. So I came back about 6 hours later and the whole scene was very much different. The coastline was several hundred meters away from the cliff and I was able to take many more photos and wander along the coast as long as needed.
http://picasaweb.google.com/107509377372007544953/Rocks#5805178660226364258
These are really crazy folds, the best I have seen so far.
http://picasaweb.google.com/107509377372007544953/Rocks#5805178689226579650
The folds are plunging towards the sea. White veins visible on top of the shale layer are composed of calcite.
http://picasaweb.google.com/107509377372007544953/Rocks#5805178727180823538
http://picasaweb.google.com/107509377372007544953/Rocks#5805178728877061746
http://picasaweb.google.com/107509377372007544953/Rocks#5805178601386649106
Here is a piece of shale from Loughshinny. White is calcite. Width of sample 10 cm.
http://picasaweb.google.com/107509377372007544953/Ireland#5758425967760011570
I paid most of my attention to the rocks but I noticed that something weird is going on in the beach sand as well. If you want to know what it is then take a look at the post I’ve written before: Thousands of sand sculptures.

Here are the coordinates of a car park in case you wish to visit the place: 53° 32′ 49″ N 6° 04′ 45″ W. The folds are a few hundred meters to the southwest.

References

1. Stillman, C. & Sevastopulo, G. (2005). Leinster (Classic Geology in Europe). Dunedin Academic Press.