The weight of the ice had isostatically depressed the surface as much as 270-280 m below its current level, making the Tyrrell Sea much larger than modern Hudson Bay. Indeed, in some places the shoreline was 100 to 250 km farther inland than at present.
The weight of the ice depressed the surface by as much as 270-280 meters below its current level, making the Tyrrell Sea significantly larger than modern Hudson Bay. In some areas, the shoreline was 100 to 250 kilometers further inland than it is now.