Who said the rocks were a million years old?
After all, you weren't there, and there is no absolute method of measuring age of rocks, only theories of how old rocks are.
Just take lava, then ask a geologist how old it is, but make sure to NOT tell him where you got it.
Now there you go again...confusing them with facts after their minds wer made up. Watch out, they will haul off and call you a NAME!
There is, by gauging various rates of radioactive decay. Try again.