However, unlike the rift valleys that would become oceans, this particular rift failed to separate the continent into distinct landmasses. The Final Inundation: Sea Level Rise As the glaciers melted, the resulting water flowed into the newly depressed basin.
Geologic Evidence: How Ice Weight and Glacial Movement Shaped the Hudson Bay Basin
The story of how the Hudson Bay formed begins deep within the violent tectonic forces that shaped the North American continent. This geographic isolation is a key factor in the Hudson Bay's unique character.
In the area that would become Hudson Bay, the Earth's crust stretched and thinned, forming a rift basin. The immense weight of the ice had also caused the peripheral regions to sink.
Geologic Evidence of Hudson Bay Weight Ice Depression
As it moved, the immense weight of the ice acted like a bulldozer, scraping and gouging the softer rock of the rift basin, deepening and widening it. During the Pleistocene epoch, this continental glacier, sometimes over two miles thick, advanced and retreated multiple times across the landscape.
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