Multiple Choice
The Precambrian basement rocks of Ohio became part of the North American continent
A) more than 2.5 billion years ago.
B) 1.9 billion years ago.
C) 1.8 to 1.9 billion years ago.
D) 1.7 to 1.8 billion years ago.
E) about 1.1 billion years ago.
Correct Answer:
Verified
Correct Answer:
Verified
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