Canadian Shield

noun

, Geology.

1. the extensive region making up much of northern and central Canada underlain by Precambrian rocks that have been eroded to produce a low shieldlike profile.

Canadian Shield

noun

1. Also calledLaurentian ShieldLaurentian Plateau (in Canada) the wide area of Precambrian rock extending west from the Labrador coast to the basin of the Mackenzie and north from the Great Lakes to Hudson Bay and the Arctic: rich in minerals See shield

Word History and Origins

Origin of Canadian Shield¹

First recorded in 1920–25