Bushido, I understand what you are saying but we are working from a premise that includes the possibility that things may now be circumstantially different from the way they were originally were.
What factor would differentiate the two? One is the Noahic Flood.
There is a tremendous amount of scientific research going on:
Taken from this site:
http://www.answersingenesis.org/tj/v14/i1/catastrophe.asp
The Genesis Flood should be regarded as the main mechanism for laying down the fossil record. While there may have been some localised post-Flood disasters, the sedimentary deposits of a continental scale can only have been deposited by the Flood because of the huge global effect of Flood hydrodynamic activity. Biblically, there is little warrant for insisting that “blot out” means complete removal without trace. Rather, the natural meaning of Genesis 6–8 is the sudden death of many creatures in the Flood. To progress our understanding of some of the apparent anomalies in the fossil record, the various scientific disciplines need to interact far more. Only then can we properly model the complex fluid dynamics of heterogeneous flows and the consequent pattern of sedimentary layering that took place in the Flood year.
The account of Noah’s Flood very graphically describes the world-encircling cataclysm that affected the earth. In recent years, there has been a growing interest in understanding rock formation as a result of the Flood and to a certain extent, after the Flood.
Nevertheless a debate has begun between geologists, all of whom reject billions of years, but who take different positions concerning where the Flood ends in the rock strata. Some have argued that considerable sedimentation occurred after the Flood, as the earth adjusted to a new equilibrium. What has led geologists, such as Garner, Garton, and others to this view, is that many dinosaur and bird tracks have been found in the rocks which (they maintain) can only be interpreted as post-Flood. Some go further and suggest all fossils of air-breathing land creatures are post-Flood.f7f9 The traditional view advocated by Morris and other workers has been that rising flood waters engulfed creatures at different stages during the Flood—first the 40 days of the deluge from above and below, and then the persistence of the waters for about 5 months. This view, though sometimes referred to by its opponents as the “tranquil Flood” model, in fact regards the waters as vast surging tidal waves, with water coming from beneath the earth as well as from above (possibly from a pre-Flood ). In a companion paper we consider a far stronger alternative view of the origins of the water from beneath. How any post-Flood activity occurred is not easy to prove since we have no way of doing a full-scale experiment!
The various theories are not within the purpose of this brief article—the debate on this continues. But all involved in the debate accept that we must always come back to Scripture to test all our thinking. What then are the key points that can be established?
The Flood was cataclysmic and worldwide in scale. Whatever post-Flood disasters may have taken place, one must never marginalise the Flood itself..............
Much scientific data here:
http://www.answersingenesis.org/home/area/faq/young.asp
Loads of data here:
http://aolsearch.aol.com/aol/search?query=Noah+/+Flood