The oldest rocks on Earth have been dated to be around what age?
Options
A
1 billion years
B
2.5 billion years
C
3.8 billion years
D
4.54 billion years
Answer & Analysis
Answer
C
Analysis
The oldest rocks on Earth, found in places like Western Greenland and Western Australia, have been dated to be about 3.8 billion years old. These provide a minimum age for Earth.
For A: Rocks older than 1 billion years exist, but the oldest are around 3.8 billion years old.
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