DCHP-1 Online
Laurentian barrier 
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
- 1887 The Laurentian belt or lowest rock-step in the ladder of time, is mainly a barren unproductive region here as elsewhere, and scarcely any land fit for settlement is to be found on it.
- 1929 There is no element in the present Dominion of greater significance than the so-called Canadian Shield or Laurentian Barrier.
- 1887 The Laurentian belt or lowest rock-step in the ladder of time, is mainly a barren unproductive region here as elsewhere, and scarcely any land fit for settlement is to be found on it.