Dennis...cool...we know Dallas Abbott...although I missed all her talks at Lamont on this subject...
It looks like Luann Becker's and Jim Kennett's special session at AGU on the 12,900 year old impact they propose did not attract any other abstracts...so looks like no special session....but their abstract is interesting (AGU 2006 fall meeting coming in December...too lazy to find this again and link to it...)
Chris