Lau|ren|tian

Lau|ren|tian «l REHN shuhn», adjective.

1. of or having to do with the Canadian upland region extending from Labrador past Hudson Bay and north to the Arctic: »

The Laurentian area, sometimes called the “Canadian Shield,” is the most important mineral-producing section of Canada (Colby and Foster).

2. of or having to do with the Laurentian Mountains in eastern Canada, between Hudson Bay and the St. Lawrence River: »

a Laurentian resort.

3. of or having to do with the St. Lawrence River and the regions through which it flows: »

the Laurentian watershed.

4. Geology. of or having to do with certain granites intrusive in the oldest Pre-Cambrian rocks of southern Canada.

╂[< Laurentius, Latin form of Lawrence + -ian]