[meteorite-list] Ammonia as an impact marker

[E.P. Grondine]

Hi all - 

At last, not Willamette. 

http://www.eurekalert.org/pub_releases/2009-12/uok-ksp120909.php

If anyone wants a copy of an image of a cast of the Trempealeau petroglyph, which may show comet fragment impacts, contact me off list.

Wednesday's AGU session promises to be really interesting.

E.P. Grondine
Man and Impact in the Americas