The mysterious demise of the ancient city of Cahokia has long remained unexplained, but now research suggests catastrophic megafloods may have devastated crops and food stores, and forced residents to suddenly abandon the metropolis some 800 years ago.
Archaeology news site Western Digs reports that Sam Munoz, geographer at the University of Wisconsin has been leading research into the area’s agricultural and geological history. Through examination of deep core sediment samples from the Mississippi River flood plain and surrounds, he and his team have been able to show that the area experienced periods of severe flooding as the climate changed over the centuries.
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