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Studies conducted at Big Eddy site land national publication

Tuesday, June 11, 2013

Big EddyJack Ray, assistant director of Missouri State University’s Center for Archaeological Research (CAR), and Dr. Neal Lopinot, director, are contributors to an article published on May 20 in the Proceedings of the National Academy of Sciences. The article, titled “Evidence for Deposition of 10 Million Tonnes of Impact Spherules across Four Continents 12,800 Y Ago,” provides detailed geochemical and morphological analyses of nearly 700 magnetic spherules from 18 archaeological sites in support of a major cosmic impact at 12,800 years ago.

“The spherules look like tiny black ball bearings that resulted from being crystalized in a molten state and then rapidly cooled,” said Lopinot. “It is contended that a comet or asteroid exploded over Canada at that time, and the spherules derive from sediments that melted at temperatures greater than 2,200 degrees centigrade. This was catastrophic for life in some places in the northern hemisphere, and it was followed thereafter by a rapid climate reversal back to colder and dryer “glacial” conditions that lasted about 1,000 years or more.”

One of the critical sites in this study was the Big Eddy site near Stockton, Mo. This site was the focus of excavations by the CAR from 1997-2011.

For more information, contact Lopinot at (417) 836-5363. 


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