however the fossils of the pleistocene extinction show the massive extinction happened only 10,000 to 12,000 years ago, supporting the biblical flood happened, suddenly, etc...
Bzzzt, incorrect. Thanks for playing. The 10-12 kya megafaunal extinctions occurred only in North and South America. Extinctions in Australia occurred roughly twice as long ago, and lasted four times as long at a minimum, and the smaller scale extinctions in Eurasia occurred even before that and were spread out over a rather lengthy time period. Late Pleistocene megafaunal extinctions didn't occur in Africa at all. (Wrong thread - if you'd like to discuss this topic in more detail, please open a new thread in Evolution).