And there was evening and there was morning?

[Paraleptopecten (Timothy Campbell)]

@cewoldt

It is stating that most of the sedimentary layers around the earth were laid down during or shortly after the worldwide flood

How does one get dozens of layers with distinctive endemics and index fossils out of that?

@Paraleptopecten

The fossils contained in the pertinent formations could not be deposited by a series of megatsunamis, as anything of the kind would destroy the many extremely fragile fossil shells. Also, many of the formations, or their subunits, have an upper section that experienced induration (starting to turn into limestone). Induration requires percolating fresh groundwater. Each formation has a unique fauna, often reflecting a different climate from those immediately above and below it. The formations follow a very consistent pattern of increasing extinction rates with stratigraphic age.

@Paraleptopecten

My question boils down to this: if these deposits were formed during the flood, then how did the sea level drop close to the current level and rise back up to 10s-100s of meters above current sea level multiple times; or, if the deposits are post-flood, then why are there no records of repeated changes in sea level of 50 meters or more? Correlation with other formations dates those that I am most familiar with as Plio-Pleistocene, though the issue comes up from the Upper Cretaceous onwards.