DCHP-1 Online
Laurentian Shield 
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
- 1940 Wherever railroads have been built through the Laurentian Shield, minerals have been discovered.
- 1963 They committed themselves to the exploitation of the Canadian (or Laurentian) Shield, the ancient rock plateau which lay north of the St. Lawrence. . . .
- 1940 Wherever railroads have been built through the Laurentian Shield, minerals have been discovered.