Which numbered area on this geologic map of North America consists of recently added tectonic terranes?
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 consists of recently added tectonic terranes? 
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

According to the map key, recently added tectonic terranes are indicated by the symbol "TT". The only area marked with this symbol is in 1, southern Alaska.

Which Numbered Area on This Geologic Map of North America