Oh aye. I'd not even be all that arsed if it turned out to be one of those Langdale natural cups that Hazeldine goes on about. I'd still harbour the suspicion that a natural basin that was facing upwards like that would have had a bit of significance to the folk who did the Chapel stile stuff.

Mind, like you say elsewhere in this thread, such suspicions are naff all in the way of evidence.

I'm hoping to get up the coast this weekend to check out the partner of this (presumably natural) oddity:
http://www.themodernantiquarian.com/post/40067/images/bowden_doors.html
Karst features in non-limestone rock. Intriguing. Geeky as feck, but hey, a nice rock is a nice rock ;)