Which numbered area on this geologic map of North America would contain the oldest rocks exposed at the surface?
A) 1, southern Alaska
B) 2, continental platform of west-central Canada
C) 3, continental shield of eastern Canada
D) 4, coastal plain along the Gulf Coast of the U.S.

Question

Which numbered area on this geologic map of North America would contain the oldest rocks exposed at the surface? 
A) 1, southern Alaska 
B) 2, continental platform of west-central Canada 
C) 3, continental shield of eastern Canada 
D) 4, coastal plain along the Gulf Coast of the U.S.

Quizplus · Accepted Answer

The Answer of Which numbered area on this geologic map of North America would contain the oldest rocks exposed at the surface? 
A) 1, southern Alaska 
B) 2, continental platform of west-central Canada 
C) 3, continental shield of eastern Canada 
D) 4, coastal plain along the Gulf Coast of the U.S.

Which Numbered Area on This Geologic Map of North America