Earth is approximately 4.5 billion years old. Is it likely that any of the rocks that were on Earth's surface when it first formed are still in existence?
A.
No, rock material is constantly recycled on Earth's surface through the rock cycle.
B.
Yes, rocks are very hard and should be able to survive for 4.5 billion years.
C.
Yes, Earth's surface has changed very little since Earth was first formed.
D.
No, most of Earth's magma did not solidify until 1 billion years ago.
1 answer
A. No, rock material is constantly recycled on Earth's surface through the rock cycle.