I thought it was 9000 years ago....
It is funny, you can create a fossil in a lab. There was a man on TV recently who had some fossils that had been carbon dated to be 40 million years old. But when they were cracked open, one had a battery in it, one had a modern hat, and one had a modern hammer. He said carbon dating is very much in question and full of error.
My daughter who is a hydrogeology major, a senior at UT, said it is EASY to create a fossil in the lab, and it would fool the 'experts'.
If your daughter told you that carbon dating is effient or even used to derive dates 40-my ago, demand your money back from the school system.