That makes sense to me, Paul. Let's see if I get it or not...basically, the lakes rise and fall would accelerate oxidation of organic material because instead of being in a constant state of wetness, it would be exposed and dried out periodically. Wouldn't the fact that the impact spheres were resting in a peat layer also be a factor that would "distance" the time as well? If I recall correctly, peat acts as a preservative for organic materials. So, you'd have two situations: one where there would be enhanced preservation...the other with significantly less chances of preservation or disturbance even. The one with the most preservation would give one date whereas the other could give a date that is skewed...the difference would be stability of the layers.

Did that make sense? lol I think I lost myself there.

Stephanie

In every man there is something wherein I may learn of him, and in that I am his pupil.--Ralph Waldo Emerson