[meteorite-list] Help with new Holocene crater, please

[E.P. Grondine]

Hi all - 

The following structure has been proposed as a crater from the Holocene Start Impacts: 

http://www.lpi.usra.edu/meetings/lpsc2011/pdf/1504.pdf

I do not play a geologist on television, nor am I one in real life, but if the "floor" of this crater dates from 10,900 BCE, then that would be the crater floor, and not infill sediments, and thus the impact itself would have had to have been well after 10,900 BCE? 

E.P. Grondine
Man and Impact in the Americas