Maybe not lots of billions of years. Pretty damned old though.
Some of the oldest surface rocks on earth.
"Mungo man" remains predate most other human fossils found.
Cycad palms still living from the time of the dinosaurs.
"Wolami Pine", that was thought to be fossil only specimens, until a couple of years ago.
I'm a little hazy on the actual time frame of course, but it is something to do with when Gondwanaland split off from Antarctica.
I was pretty young at the time, so I don't recall it all that well.
Edit.
And now to get back on track we have this link.
http://www.angelfire.com/stars2/messier/Impact.html
The Wolf crater is
very impressive.