DCHP-1 Online
Laurentian plateau 
a vast area of mineral-rich, mostly granitic, Pre-Cambrian rock surrounding Hudson Bay and extending as far southward as the Great Lakes.
See also: Canadian Shield
- 1917 . . . the peculiar significance of the Laurentian plateau in its relation to the development of Canadian history lies in the fact that, speaking generally, it is a great tract of barren country incapable of supporting an agricultural population, and thus splits the Dominion into two parts, Eastern and Western Canada.
- 1926 East of a line drawn from the Lake of the Woods to Great Bear lake in the far northwest lies the ancient Laurentian plateau. . . .
- 1952 The Pleistocene glaciation is nearly as evident here as in the Laurentian Plateau.
- 1917 . . . the peculiar significance of the Laurentian plateau in its relation to the development of Canadian history lies in the fact that, speaking generally, it is a great tract of barren country incapable of supporting an agricultural population, and thus splits the Dominion into two parts, Eastern and Western Canada.