Let's see what the geologists say.
Dr. A. Snelling is geologist, research scientist and technical editor who studied at the University of New South Wales in Sydney. He writes:
"As a geologist I am also interested in the biblical account of earth history, particularly the record of the year-long global catastrophic Flood in the days of Noah that must have totally reshaped the entire surface of the globe. In fact, based upon the biblical description of the Flood event, it is logical to predict that it would leave behind billions of dead animals and plants buried in sediments eroded and deposited by the moving flood waters, that would all end up being fossils in rock layers laid down by water all over the globe. And that's exactly what we find - layers of water-deposited sedimentary rocks containing fossils all over the earth.
There is impressive evidence that fossil deposits and rock strata were formed catastrophically. There are also many indications that there were not millions of years, or even thousands, between various rock units. The rock sequence in the Grand Canyon is a case in point. Not only can it be shown that each of the rock units exposed in the walls of the canyon must have formed very rapidly under catastrophic watery conditions, but there are not significant time gaps between the various rock layers. Thus, the total time involved to put in place some 4,000 feet (1,200 meters) thickness of rock strata is well within the time constraints the Bible stipulates for the flood event.
What is also spectacular about the Grand Canyon area in northern Arizona is the scale and magnitude of the rock units and the awesomeness of the canyon itself. One can physically walk up and down the sequence of rock units that go back before the Flood, and then right through the Flood event up until post-Flood times. While the sequence is not complete, there are few places where such a complete sequence is so fully exposed and so much evidence for the Flood and its catastrophic nature.
No geologist denies that the oceans once covered the land, since rocks containing marine fossils may be found at elevations above sea level today anywhere from one to five miles. That the ocean waters should have covered the land is exactly what one would expect to happen during a global flood, while earth movements concurrent with the retreating flood waters would be expected to leave strata with marine fossils now perched high and dry at considerable elevations, just as we observe, for example, in the Himalayas.
In Australia, without doubt, one of the most impressive areas demonstrating catastrophic deposition during the Flood is Ayers Rock (or Uluru). The scale of the sandstone beds that have been upturned to form the rock gives clear testimony to the scale of deposition in the Flood. The mineral grains making up the sandstone are a witness to the cataclysmic speed of the deposition process and the young age of this awesome desert landform."
Whoever claims that the Flood did not happen as described in the Bible should research a bit first; the evidence is overwhelming.
