...many believe show causabilty of such a flood versus the simple coincident nature of these data.
I think the notion of a world wide flood is ridiculous. If there had been a global flood the evidence would be seen everywhere. You would expect to see layers upon layers of sedimentary rock in the earths crust, all laid down by water, and each layer would be full of fossils of creatures. And you would expect that all the smaller less mobile creatures to be found closer to the bottom, and as the layers progressed upward, you would find the more mobile life forms.
What's that? The earths crust is full of layers upon layers of sedimentary rock laid down by water? These layers are full of fossils that progress from the less mobile to the more mobile?
Oh... never mind...