Oh, really? You'd expect to find six reef communities stacked on top of each other instead of all the reefs at the bottom? Got it.
When Krakatoa blew in the 1800's Lisbon had just made a long marble pier into the sea. The resulting tsunami crashed into the pier and pieces as big as 16 passenger vans were found over 3/8ths of a mile away.
I'd expect total upheaval and everything to be everywhere, but with some generalities.
How things get where can happen in several ways we have seen this with volcanoes and other major events. Especially when something occurred that was recorded that did occur across the whole world in one moment with catastrophic results, but even localized ones can also churn up things. All of this is beside the points I make either way, it only adds complexity to the beliefs that somehow in very fast geological time new species emerge and leave over and over again with new body forms, and all of those were lifeforms with distinct genetic code driving the processes that make up these new lives, over and over.
Let's forget about volcanoes because they produce igneous, not sedimentary rock. But even in the case of a major geological, earth-wide extinction event such as the Chicxulub asteroid impact we don't see the same huge amounts of material/rock being deposited and certainly not on the planet-wide scale of sedimentary rocks.
I did suggest we set aside any fossils that might be found in strata of this kind, so can we avoid referring to 'new species' or 'evolutionary explosions' for now?
On the subject of the sedimentary rock layers themselves, they can form very deep deposits and the Grand Canyon is a good example, so I'll ask again - how do you explain this? Strata are most usually horizontal and uniform without any of the distortions and mixing that a catastrophic event would produce.
How is that supposed to have resulted from any ancient flood, in a short period of time? Apart from anything else, the volume of rock we're talking about is absolutely immense.