You didn't miss much with the Welsh stuff...bit of folding of rocks...yet another computer image of continents crashing into each other....they then demonstrated the same machine that Men of Rock had that shows how pressure causes rocks to fold.

.....and then they went down a Roman mine tunnel called an Adit.....I didn't realise Adit was a Roman word..so iv'e learnt something tonight.

Oh and we saw some 'rock hard quartz' what other hardness would quartz have?