thanks - so it's not known whether the kerbs - and the carvings - would have originally been covered by turf? presumable they survived the rain for thousands of years somehow?
If I remember rightly the sides slipped down and covered them quite early on. When excavations were started they didn't know the kerb was there or either passage. I was just a big bump on a high bit of ground. Again, if I remember correctly I read somewhere that there was possibly a retaining wall on top of the kerb.
> presumable they survived the rain for thousands of years somehow?
don't underestimate the effects of (relatively) modern pollution - Pictish carvings round here that were made as far back as 1500 or 1600 years ago were super crisp right up into Victorian times, then started to "weather" rapidly after that