So what about SILT and dating????

As far as I can see, all this discussion depends on the Chicxulub impact. If there was a perfect world, pre-Flood, the impact didn`t take place. If it happened during or post-Flood, the tremendous expansion would have blown away, or severely disturbed, the sediment layer. Since the layer is still there, do we assume (a) no perfect world? (b)no impact? or (c)no Flood? Hang on, maybe there`s a (d) God used the impact as part of His engineering plan pre perfect world?