Lucy writes:
Ok Nuggin, now sweep up the junk, hire some earth moving equipment, dig up your driveway, the dirt, the clay, the sand and the bedrock. Now put it all in the glass of water and tip it out down a slope. Now do a cross section.
I assume you are aware that geologists don't rely solely on layers of ancient asphalt concrete to see layers?!
Firstly, this analogy doesn't help you. The layer will be discernable if the composition or formation of the material you threw in is different from that which lines the hole. Water moves material around, so when it is deposited it is often placed in an area where the local geology is vastly different from the deposit. Floods move huge amounts of different types of sediment very long distances, so the layer would be visible due to a the difference either in the type of material or its formation.
Secondly, seasonal markers like pollen can also be deposited - this can enable geologists to spot yearly floods.
Thirdly, a global flood would have killed alot of wildlife - this would be seen in the strata.
Finally, if you now fill up your hole it would be possible for a geologist to do a cross section of the area and determine that you dug it due the fact that the material has been rearranged locally.
Again, you're not thinking this through - dirt ain't just "dirt", you know.....