I immediately thought of the 2 mile crater in the Iraq Marshes, but I also recall reading about several craters of roughly the same age in Argentina. I think they may have been from 6 to 14 miles or kilometers in size. I also recall reading that there were two distinct episodes of particularly bad weather spread over a century or more around 2,000 BC.
Another item of interest is the Ipuwer papyrus, written by Ipuwer about the calamity occurring in Egypt at that time. It is in the Lyden Museum or University, I forget which. Overall this may have been a period of repeated boloid strikes and the resultant climate disasters. The mention of 12,600 BC may coincide with the probable boloid strike in upper North America. SC — The book!!
Disaster That Struck The Ancients
It once had a picture of the crater.
Papyrus Ipuwer, FR, w/ thanks to Fred Nerks:
http://www.freerepublic.com/focus/news/999861/posts?page=11#11
http://www.freerepublic.com/focus/news/1912063/posts?page=19#19
http://www.freerepublic.com/focus/chat/2483502/posts?page=15#15
and w/ thanks to ml/nj:
http://www.freerepublic.com/focus/news/999988/posts?page=7#7
http://www.freerepublic.com/focus/religion/2049391/posts?page=8#8
and VannRox:
http://www.freerepublic.com/focus/news/744698/posts
http://www.freerepublic.com/focus/news/669255/posts
and (shudder) medved:
http://www.freerepublic.com/focus/news/742387/posts?page=144#144