The oldest rocks ever found on planet Earth are metamorphic rocks in Canada abso

Question

The oldest rocks ever found on planet Earth are metamorphic rocks in Canada absolute dated to about 4.0 billion years ago. What can we say about the age of the Earth?

A. The Earth is 4.0 billion years old because metamorphic rocks form from intense heat and pressure.

B. The Earth is younger than 4.0 billion years because minerals in metamorphic rocks are known to absorb radioactive daughter products.

C. The Earth is probably older than 4.0 billion years old, but we just haven't found rocks from that age yet.

D. If we can absolute date correctly, the Earth MUST be older than 4.0 billion years because metamorphic rocks form from changes to existing (and therefore older) rocks.

Explanation / Answer

The conclusion drawn from the above statement that the oldest rocks in Canada have been dated to 4.0 billion years ago, is that:

D. If we can absolutely date correctly, the Earth MUST be older than 4.0 billion years because metamorphic rocks form from changes to existing (and therefore older) rocks.

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