 The withdrawal of the Sea of Goldthwait was gradual, 2,000 years ago the isostatic rebound stabilised at around per year, the withdrawal of the water formed a number of narrow streaks of emerged land near the riverside between Rivière-du-Loup and Rimouski, known today as Île aux Lièvres, Île Verte, île aux Basques, île du Bic and île Saint-Barnabé.The estuary of the Saint Lawrence river, to the north of the region, plays a primary role in the region.It is divided in two regions split at Cacouna