Central Canada IS pretty rock-solid - Look up the Canadian Shield (also called pre-Cambrian shield)
Don't think it exempts us from biblical Armageddon though. For that, we have only our barbed wit and Reality Field to protect us.
No, they are two different BS end-of-the-world prophesies
One is for people who take ancient literature too seriously, and the other is for people who take ancient calendars too seriously.
This one isn't a Catholic prophesy, I'm afraid, it's the invention of a character named Harold Camping, who is some flavour of American protestant.