I confess that the one thing I still don't have too much knowledge about is the whole dating process. This is the only thing right now that throws me off a bit. I don't know enough about the accuracy of dating methods to make a judgment one way or another. I've read arguments from both sides. I just try to look at as much evidence as possible with an open mind, and so far I can't agree there's absolutely no evidence of a massive, worldwide flood. Because there is.
Let's come back to the dating stuff later. It's not that hard, and completely demolishes any possibility for the flood or a young earth, but we don't have to deal with it now. Not only is there almost no evidence for a global flood--there is tons and tons of evidence against it. Here's just a few of the obvious objections:
--Such a flood would have utterly destroyed all plant life, on land. Thus, when the waters receded, there would have been nothing but a barren, empty, lifeless surface.
--All the animals on earth and in the water would have been killed at the same time. (ocean dwellers: water not salty enough. freshwater: too salty) So we would expect to see a single layer of fossils all over the earth, all the same age, with a massive extinction event represented by a single equally massive layer of fossils. There isn't one.
--There is a kind of geological layer called a paleosol. This is a kind of rock formed by a thick layer of earth when the earth is not under water, which is later compacted and turned to rock. These paleosols appear all over the earth at all different periods, demonstrating that at the point they were laid down, that part of the earth could not possibly have been under water.
--Had there been a flood, you would expect to see three basic layers: the pre-flood base layer, the flood deposits, representing violent sudden erosion, scouring of underlying rocks, and layers of mixed mud, gravel and organic debris, and absolutely filled with fossils of everything then in existence. From the frequent actual local floods on earth, we know what these layers look like (think Katrina) everything jumbled up together, not neatly sorted. Then a layer of silt on top of everything. Finally we would have layers comparable to what is forming today. This is not in fact what the earth looks like. In fact we have millions of layers in many complex formations--too complex to go into detail without th equivalent of several geology courses.
--For example, there are many places in the world where a layer of conglomerate rock, with large rocks and even boulders stuck in it like raisins in cake, rest on top of thousands of layers of sedimentary rock formed from silting layers of sand. Obviously in a flood the heavier boulders would sink to the bottom, so again--not possible to form from a flood. The bottom layers were already hardened into rock when the heavier layer on top formed.
--Often there are clean, sharp boundaries between geological layers. Sometimes one layer has fossil barnacles on it, with another layer of rock on top. These barnacles and limpets only attach to surface rocks, not under water, so obviously the bottom layer was not under water, and then much later another layer was laid down on top of it. Not possible during a flood.
--The biggest problem, IMO, is the order of fossil succession. It's always the same, all over the world. The older, more primitive creatures are on the bottom, regardless of weight or density. Then more recent creatures, such as dinosaurs. Mammals only on top, and humans on the very top. The sorting is never by weight or buoyancy, always by order of development. Couple examples: extinct flying creatures, like pteranodon, is always in older, lower layers than more modern heavy creatures like say a hippo, while birds and hippos are in the same layer. Do flood believers think that pteranodons somehow got drowned, while hippos flew above them? Similarly, extinct plants like giant ferns are in older, lower layers than more recent plants, along with their characteristic pollen. How would a flood possibly do this? A dramatic example are sea turtles. Because they are recent species, they are found in the highest, newest rock layers, above frogs, above dinosaurs. How would a flood do this? This isn't a sea turtle fossil--it's all of them. This pattern is found over and over again, thousands upon thousands of times.
--All kinds of fossilized remnants like termite nests, was cocoons, dinosaur nests and eggs, bird nests and eggs, fossilized worm holes, rodent burrows, animal tracks, even animal dung in its original piles as it dried and cracked on solid ground--all things that could not have been preserved under water. At various different layers in the rock. No way those layers could have been formed by a flood.
--As you probably know, Australia is populated mainly by marsupials, no placental mammals, and most found nowhere else on earth. So, after say the koala bears get off the ark, they race across Asia, always ahead of the tigers etc, swim across the Indonesian archipelego, etc., leaving all the placental mammals behind, and along with their cousins the wombats and kangaroos, populate Australia, filling all the available ecological niches, while all of the world's placental mammals just happened to stay behind in Europe and Asia. Um hmm.
--Varves. This gets into dating a tiny bit. A varve is a layer of sediment that forms at the bottom of a calm lake and eventually hardens into rock. Actually two layers, because there is a lighter summer layer and a darker winter layer. So scientists can count them (tedious) and determine how many annual layers of rock were laid down. In one of the most famous examples, the Green River formation, they have counted about 20 million varves. No sudden thick layer of sediment crammed with fossils, just varve after varve after varve, with fossils sprinkled throughout, and throughout always obeying the law of fossil succession, with older, extinct fossils lower, and more modern mammals etc. higher up. The only thing you need to know about radiometric dating is that when they do it to the varves, they get the same results.
--ice cores. Same thing. Layers of ice in Greenland. Two layers per year. 40,000 in a single core. No sudden difference 6000 years ago. Slight fluctuations related to how much it snowed that year--that's all. And, again, matches up with the radiometric dating method, which matches up with the varves.
--tree rings. Same thing. There's a plant called King's Holly in Tasmania that reproduces by cloning, so in a way they're all one big ring of the same plant. It's been growing there for 40,000 years. Also creosote bushes in the Mojave desert 12,000 and 15,000 years. Growing in that desert right through the flood.
Actually there's a lot more, but I'll stop there for now.
A thought about science. All of this is out in the open. Everything has to be subject to replication. That means that other scientists get to try it and see if they get the same results. You can go to Green River and count the varves yourself. No secrets, no conspiracy, just a lot of hard work and hard thinking.
Also, geologists don't have an atheist agenda to prove there was no flood. Most of them are Christian. They would have been just as happy to find there was a flood. It just so happened that there wasn't.
I think I gave you this link before:
Glenn Morton's story. I wish you would click on it. Glenn Morton was a YEC and physicist who went to work doing geology for an oil company. What made him realize that YEC, and flood theory, is just plain wrong, was going out into the field and seeing the rocks. In this article he tries to convey what he saw, and why he came to realize it was not compatible with YEC flood theory. Give it a click and let me know what you think.