How old is the tyrannosaurus rex?

It is impossible to tell how old an individual T-Rex skeleton may be, but a good approximation can be made with some simple logic. So instead of answering your question, I'm asking another. How long should it take a large skeleton to fossilize? actualy a tyrannosaurus rex can be told how it was by chiping a bit of a bone and looking insid

It is from the Triassic period about 2 million years ago.