Which parts of North America have NOT been added to the continent since the Precambrian?
A) some parts of the Appalachian Mountains
B) rocks along the West Coast
C) Alaska and western Canada
D) Canadian Shield
E) all of these

Question

Quizplus · Accepted Answer

The Canadian Shield is the only part of North America that has not been added to the continent since the Precambrian. It is the ancient geological core of the North American continent, formed during the Precambrian era.

Which Parts of North America Have NOT Been Added to the Continent