Cross dating for dendrochronology
This basic problem for young universe creationists is one of time for known processes to operate.
Additional note: There is a basic problem with chalks and several other sediments that accumulate slowly today.
I think Tyler is much more on target talking about decades for the building up of these layers.
The evidence that this has taken time, even with rapid photosynthesis comes from the fact that deposition has stopped when the hard grounds were formed and that speciation trends are present. We have mentioned in that the plasma model for the formation of the solar system and the earth results in a layered planet.
The remainder of the rock is usually calcium carbonate.
He also makes the point that these rocks are formed at depths usually less than a few hundred feet. He says that the purest limestones and chalks form as very shallow water deposits.