Probably occurred around 4000 years ago during the flood of Noah. But anything important in make believe science must be at least 300-600 million years old to give it the illusional/delusional sugar coating it needs in order to fit into the completely and utter unprovable theory of evolution. First rule of junk science, make it so old as to be completely impossible to prove or disprove.
Why does everything have to be millions of years. The Mt. St Helens eruption changed the landscape in a day. Lakes were removed, rivers re routed and canyons were dug overnight.
Have you seen the iron hammer that was dug from a coal mine that was supposed to be millions of years old? How about the fossilized "foot" still in a cowboy boot manufactured in the 1950's that was dug out of a stream bed in Texas?
When people buy into this stuff, it just shows a lack of common sense. How many armadillo's remain on the side of the road long enough to be fossilized? It must happen quick to cut off the oxygen, and most likely the covering up is what killed them. If you find an animal that was obviously eaten, then the remains would have had to be covered within a short while after. Also, the covering would have to be several feet thick or made of something like clay or molten rock. Otherwise the organic material would still decay over a relatively short time.
Science and logic beats hokey mythology anyday.
That being said, I truly would put my life on the line the defend your beliefs. ;-)
As opposed to?
Oh, wait, I know...