curious near craig phadrig is tomnahurich hill which aparently translates as hill of the yews. i just spoke to my dad, in inverness, he is quite into geology and said that craig phadrig hill is made of conglomerate, lots of rocks all bound together by iron oxide or something else, he said he has often wondered if infact if this material was used for building would it give the impression of vitrification as it often tends to look like lots of rocks melted together. I think (but maybe wrong) craig phadrig and some other hills are eschers formed from the ice age as you can imagine lots of rocks carried in the ice would be deposited as it melted, could these rocks get a polished appearance from there movements in the ice/water? Anyway that was my dad's thought in veiw of this it may be interesting to look at the geology by other vitrified forts as conglomerate is not every where but there is a bit in the north of scotland.
love carolinexx