Stipe
I'll omit the quotes, since the board doesn't seem to deal with a response to a response very well:
Age of the Earth
I doubt that "evolutionists" refuse to discuss the age of the earth. I noted that I would be happy to talk about the age of the earth, but that that was beside the point of my discussion - I wanted to focus on how the geological makeup of the earth, taken as it is, disproves the flood. You don't need to date, or demonstrate that it is exactly the same everywhere you go (in fact, it would not be exactly the same, though it is similar). So no, evolutionists don't shy away from discussions of dates. 4.5 billion years!
Evidence Against the Flood
You say there is no evidence against the flood - this is simply not true. We have evidence of great floods over and over, in many parts of the world - just no evidence of a single flood, all over the world, one year in duration. Later in your responses, you note that we do have strong evidence of the a world-wide catastrophe called the KT boundary, so you know what evidence would look like. A global flood could not have happened and not left evidence, and the earth as we find it would not have be as it is if a global flood, resulting in the death of all land creatures, had occurred.
Footprints During the Flood
You ask how footprints in a geologic layer disproves the flood. Well, the normal creationist explanation for the sedimentary layers geologists find is that they were laid down in the flood. All creatures are held to have died in the flood, except those on the ark. Therefore, take any layer claimed to be laid down by the flood. Search above that layer, and when you find sun-baked layers, layers with footprints in them, layers with multiple fine deposits that would have taken more than a year to form (in the aggregate), the flood no longer works as an explanation. You can start from the top, as well, and go back 4,000 years from the present, and account for whatever layers you can in that time period, eliminate those, and you still have many, many layers that cannot be explained away by the flood.
Fine Sediment in Multiple Layers
The point about the fine silt precipitating goes like this: Fine silt settles slowly, and represents (for example) seasons (runoff from snow melt, for example, though there are various reasons for the periodic nature of fine silt deposits). It takes a long time for the fine silt to precipitate, so it takes calm water (turbulence keeps it in suspension), and time. You count the layers, and what you see is evidence that the layers in question were formed over time - sometimes as many as a million years. So it could not have happened in the flood (it is not a single precipitation event), and it could not have happened since the flood (not enough time). This is not "a couple of debatable exceptions," it is a common event, recorded in lakes and seas all over the world. Your claim that 90% of deposits could support a global flood is just not true. For example, a vast plain 300 meters deep, made up of loess in China could not have been deposited wet, and could not have been deposited since the Flood.
The KT Boundary - an example of positive evidence for an event
The fact that no one is disputing the iridium deposit around the globe underscores my point about falsifying the prediction that there was a global flood. When the idea of an asteroid strike as an extinction event was first floated, this was one of the predictions - then they went out and looked for the data. See how this works? When the iridium deposit was found around the world, this gave strong support to the theory of an asteroid strike. However, perhaps as implied by your question as to whether there as one or more asteroid strikes, there is some discussion about what created this layer - a single strike, or multiple strikes. Unlike a creationist apology for the data, it doesn't really matter if it was one or two strikes. What do I think? I think I'd like to hear more about what the data supports, which is what scientists are doing - looking at data, making models, testing them, trying to falsify them.
Conclusions
Is there any of the predicted evidence to be found for a global flood, that cannot be better explained by standard geological theories? No.
Do standard geological theories predict and explain geological features better than the flood idea? Yes.
Does the data (the earth as we find it to be) present features that cannot be explained by a global flood? Yes.
Based on this evidence, the idea of a global flood must be rejected.