Isostatic rise has occurred with regard to Scotland, but Scotland is not in a seismically or volcanically active zone. The vast majority of these activities occur at plate boundaries. Imaginative proposals for other triggers require evidence of the sort that was gleaned at Santorini.

But this: "Steve objects to my lay description of lighter and drierI used to simplify and communicate better" is just my calling out lazy and downright unscientific statements (again!). You do not communicate science better by issuing careless and inaccurate "information." In this regard, allow me to also correct your statement about the last glaciation: it occurred from around 115,000 years ago to around 12,000 years ago. You put lots of energy into trying to defend your inaccuracies. You would avoid that if you'd just check your facts before posting. I haven't posted anything in the last few hours that I haven't checked on reputable websites first.