What part of North America contains the oldest exposed rocks?
A) the Appalachian Mountains
B) western North America
C) Alaska and western Canada
D) the Canadian Shield
E) the east coast of Canada and nearby parts of the U.S.

Question

Quizplus · Accepted Answer

The Canadian Shield is known for having the oldest exposed rocks in North America, some of which are over 4 billion years old. This vast area of ancient crystalline rocks forms the core of the North American continent.

What Part of North America Contains the Oldest Exposed Rocks