I don't believe an impact alone killed off the dinosaurs. It just facilitated their demise. The flood you spoke of would have happened thousands of years ago. The dinosaurs have been extinct for millions of years, so the time line doesn't fit with the theory of them being killed in the flood.
That’s true....So dinos existed long before the creation of human beings but their had to be a purpose why Dinos were on the earth.....
The dinos may have been extinct for about a thousand years, but certainly not much more. there is just too much written, cultural, and graphic record of them for them to have perished very long ago. Some are probably still hanging on, such as the plesiosaur that is often seen, and others that are often discussed in the northern Congo.