The canadian shield, a vast expanse of ancient rock, is centered around which area?

The Canadian shield is centered around The Hudson Bay area, bordered to the east by the Appalachian fold belt, and to the west by the Interior Platform. The Canadian Shield is an area of exposed intrusive igneous rocks, primarily granite. This area contains major deposits of iron, gold, copper and nickel.

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast.