No.If you go back in time, there was a sea the size of the Mediterranean geologists called Champlain Sea, and the Saint Lawrence is a remnant of that.It formed after the glaciers from the Ice Age melted.
It is expected that if the level of the sea rose by 40 meters, the region of Montréal would look like that.(The entire toponymy of this map is strange ; it was made from someone that was not familiar with the area… and there is a few jokes, like this détroit of the Mille Poissons) However that is a very very pessimistic scenario.I was told assuming current rates were constant, it would require 16 000 years to get there.
Was the Island of Montreal connected to Quebec by a land bridge prehistorically?The island of Montreal is an irrelevant landmass in terms of geological time; formation of continents, ice ages, and shifting landmasses.
The Island of Montreal is the largest of several islands that make up the Hochelaga archipelago.They were formed by the same forces that created the rest of the Monteregian Hills of which they are a part.
Was the Island of Montreal connected to Quebec by a land bridge prehistorically?No, it wasn’t.