The oldest material found on Earth is a zircon grain that is 4.12 Ga.How come there are no rocks that are the same age as Earth (4.54 Ga)?
A)We just have not found them yet.
B)No rocks formed during that time.
C)All rocks from that age have been recycled.
D)Earth is not that old.

Question

Quizplus · Accepted Answer

It is believed that all rocks from that age have been recycled through processes such as plate tectonics, erosion, and subduction, so none remain on the Earth's surface.

The Oldest Material Found on Earth Is a Zircon Grain