If you are going to stop in Glasgow briefly on your way, and want to talk geology, I suggest you try to meet John Faithfull at the Hunterian Museum in Glasgow. He will be able to suggest any currently interesting geology-related things you might find interesting. He can talk about the geology of Mull and nearby places for days on end. (He's just been involved in curating an exhibition about the history of gold in Scotland, which you have unfortunately missed).

Might be worth dropping in to the British Geological Survey at King's Buildings in Edinburgh, too.