But surely for hydrodynamic sorting to have played any part at
all in consistent fossil ordering it would have to be a
deterministic process. It's not ... I checked up some research
papers on it ... the dynamics are so complex that the end results
are inconsistent even in lab. tanks.
And hydrodynamic sorting would supercede the rest of your sorting
processes in a year-long flood, surely.
Once the critters can no longer escape (the world was covered
after 40 days and the waters receded after 150 days) the major
'sorting' influence would be hydrodynamic sorting.
If 'escape' is a factor, surely we should only find 'mobile'
animals in strata at higher altitudes ... don't animals flee to
high ground during floods? Or is the whole contour of the
earth changed at that time?