Some problems with the YEC global flood model:

As my above post stated, one of the biggest problems for flood geology is the sheer QUANTITY of biologically derived material buried in the earth. Coal and oil are only two kinds of biologically derived materials. If you add up the sheer mass of compressed material (that we know about) you quickly come to the conclusion that the surface of the earth is not large enough to accommodate all of those lifeforms at the same time. Do you know what limestone is made of?

The reason all of that fits into the earth now is because it is both compressed and it is buried in depth. As soon as you have to take into account that all of the things that comprise coal and oil had to at one point in time, at effectivly the same time, be alive and growing on the surface of the earth, the idea that they were all killed and deposited quickly is instantly falsified by the fact that there is simply not enough room.

Creationists also need to get their stories straight. In response to this, some creationists have said that oil is not biological in origin but rather that it somehow is created deep within the earth. This has also been falsified but it goes to show you that even some creationists realise that the quantity of material formed by biomass in the earth is a killer for flood geology.

There are other problems with flood geology, such as how large structures of evaporite minerals could make layers during the flood. Evaporites are types of rock created by evaporation. You can evaporate a whole lake of very "salty" water and get mere millimeters of salt or gypsum to accumulate. Some large evaporite layers are dozens of meters tall.

You could say that the flood receeded and allowed time to evaporate before returning but that would not be consistent. Remember the Bible says that there was only one flood. There is also problem considering the amount of time it would take to produce these layers in the earth that are then buried by even more layers that have different properties that take time that just simply cannot fit into a year time frame.

There is also genetic evidence -- or should I say lack thereof, for a global flood. If the Biblical Flood had happened, there would have been a bottleneck event in EVERY species of living thing and all pointing to exactly the same period; also, that bottleneck would be almost yesterday as gentic time goes.

Geneticists can see bottle neck events in some species, but they are all at different times and most are tens or hundreds of thousands of years in the past. The genetic information shows that there has not been a single unique bottleneck event affecting all species. Hence, no global flood that wiped out all but two of every "kind."

More evidence from geology:

Angular unconformities – Angular unconformities are where sediments are laid down in layers, then tilted and eroded, then new sediments are deposited on top. How does a global flood simultaneously deposit, tilt, and erode in the same exact place?

Radiometric dating – All common forms of radiometric dating, including C14, K-Ar, Ar-Ar, Rb-Sr, Th-Pb, U-Pb, and fission track. The dates derived from these diverse methods, when properly interpreted rather than intentionally misapplied, show that all but the very most recent deposits in the geologic column are vastly older than the Biblical flood. My sister-in-law, who is a geologist, told me that measures of cosmic ray bombardment are particularly helpful in her field, because this can show how long something like the surface of a glacier has been exposed to the air. Again, no evidence here that everything was covered by a global flood a few thousand years ago.

Fossil Sorting – The sorting of fossils in the geologic record is consistent with evolution and geology across all formations worldwide. There are basically no fossils of dinosaurs found with modern mammals, even when such dinosaurs could fly. There are no flowering plants in the Cambrian, no grasses, no mammals, and no birds. The overall sorting does not show any evidence consistent with a flood or settling in water.

Paleomagnetism – Because the Earth’s magnetic field has reversed polarity and has wandered over the globe in the past, certain igneous rocks show such preferred magnetic orientations when sufficiently cooled. By mapping these directions and reversals, which correlate with radioisotope dating and stratigraphy, it is easily shown that the vast majority of seafloor sediments, along with most volcanic rock, are way too old to have been deposited by any flood. In fact such measurements are one of the great evidences for plate tectonics, which alone invalidate a global flood.

Coprolites – Coprolites, which are fossilized turds, are preserved throughout the fossil record. How does a flood have animals constantly crapping in the midst of a flood after they are exterminated?

Detailed layering – How could a global flood create thousands of layers seen in several geologic formations, each of which requires a different depositional environment?

There are many more "silver-bullet" evidences that disprove a global flood. What I listed here are merely some of them. Can any creationists here explain ANY of them without resorting to "it's all lies"?