Zircons found in continental rocks give evidence that continental crust was forming as long ago as ________.
A)4)4 billion years ago
B)1)9 billion years ago
C)564 million years ago
D)70 million years ago
E)10,000 years ago

Question

Quizplus · Accepted Answer

The presence of zircons in continental rocks indicates the formation of the continental crust as far back as 4 billion years ago.

Zircons Found in Continental Rocks Give Evidence That Continental Crust