200-year-long drought may have killed Sumerian language
MSNBC | 12-4-2012 | Tia Ghose
Posted on Wed Dec 5 09:09:59 2012 by Renfield
http://www.freerepublic.com/focus/chat/2965817/posts
A drought would of course occur after an impact event. I’ve been in that part of Iraq and the land is as flat as a pool table from formerly being a shallow sea. Any large, circular depression would be very suspect as it is not natural to the sedimentary seabed of a shallow, sand-blown ocean like the gulf.
There are two circular depressions near Umm Al Binni which are 20 miles in diameter.