I'm not convinced either way. I've seen raths and enclosures with stone entrances, but none of them were like this, and I've seen prehistoric tomb entrances that were very like this. The whole area is laden with ancient cairns and Boleycarrigeen is a half hour walk around the other side of Colvinstown Hill.
He does leave it open to doubt in the article, and I'd be happy to concur, giving this site a disputed antiquity label until a definitive excavation proves otherwise.
These were in Archaeology Ireland recently (Summer 2012) and they were described as the original entrance into "the sacred space of an early Irish church enclosure".
They do look a lot like the remains of a megalithic tomb of some sort alright. However it does seem that some enclosures and ring-forts did have stone entrances.
Mr G, you are right - this is the one I saw.
However, it was far more overgrown when I visited than is shown in the photos.
It looks to me that the 'spiky' grass has now covered more of the henge.
Thanks for the correction! :)
Fantastic fieldnotes, brought back wonderful memories of one of my favourite sites, and some great words of wisdom I can draw on when trying to answer the inevitable bemused questions from colleagues and acquaintances who wonder just why it is I’m always so obsessed with ancient tombs!