First of all, Jovaro and Helix, God'schild is right about one thing. The heaviest does not always settle in one particlar place. You can easily prove this to yourself by taking all sorts of material, including dirt and sand and gravel and leaves and twigs, etc. etc. from your yard (or a nearby lot), putting them in a gallon jar, maybe about half way full, pouring in enough water to make it about 3/4 full, closing the lid and giving it a good shaking for about a minute.
Then let it set for a couple of days until it's all settled. You will find some interesting layering that has little or nothing to do with size. I have done this with science classes when I taught and not only did we get surprising results, we got DIFFERENT results each time! Go figure!
However it is absolutely correct to say the geologic column could not have built up in one year. It did not take millions of years, but it was certainly more than one! We have windblown sand layers in between water-deposited layers. We have the large sponge reef layere, IN SITU, across a good bit of Europe, OVER a coalified layer and beneath the dinosaur nests!
It takes a good deal of imagination to try to squish that all into one year with one Flood!
Yes, the Flood happened, but all those layers in the geologic column from Cambrian on were formed afterwards.