Last I saw, many flood geology advocates were claiming that there are no
Precambrian fossils. Ediacaran fossils were recognized as such in the late
1940's, and microfossils, stromatolites, and macroalgae go back through
much of the Precambrian. There are hardly any rocks older than fossils.
Lack of fossils below but present above, if attempted to apply on a very
local scale, will give all sorts of balmy results. Pliocene sediments
onlap onto granite here in the North Carolina coastal plain. Surely that
was not the last region to be flooded!
Disregarding stratigraphic correlations rejects closer to two centuries
than one. "Strata" Smith first published in the 1810's, and his ideas are
prefigured in some earlier work on the continent, not to mention Steno and
simialr speculative ideas. This is important in that some claim that
stratigraphy was dreamed up in support of evolution. It also requires
inventing some explanation for why the same things co-occur (and the old
standby of increasing ability to escape the Flood does not work, as marine
microplankton occurs from the Precambrian to the Recent, to name but one