Fossils need special conditions to form and for them to appear in such extravagant abundance throughout the earth's crust is definitely fine evidence for a worldwide catastrophe capable of preserving their forms.
What do you mean by "extravagant abundance"? Such a vague term can only mean there is much more than expected by some other means. What is your reference value? What number of fossils would you predict for hundreds of millions of years of geological history without a flood, and why would you predict this number?
Because, honestly, it's pretty darn rare that I ever hear anyone talk about the the "extravagant abundance" of the fossil record - except, interestingly enough, for animals that live in conditions conducive to rapid burial by ordinary means.
™ Version 4.2
