A ship sunk by a German U-boat in 1942 can today help track large pulses of mud from the Mississippi River.
For a ship that sank 80 years ago, the SS Virginia has traveled a fair distance: the oil tanker has moved more than 10 kilometers since it was torpedoed by a German U-boat in 1942.
There is accordingly a need to better understand the behavior of mudflows in the Gulf. But geophysical surveys that cover large swathes of the seafloor are rare, Damour notes. “The last comprehensive mapping effort that looked at the entire Mississippi River Delta Front took place in 1979,” she says.
She and her colleagues found the wreck has moved considerably over time, according to results they presented in December at the American Geophysical Union’s Fall Meeting. A survey other researchers conducted in 2006 and 2007—not long after hurricanes Katrina and Ivan—revealed that the shipwreck had moved southeast by roughly 400 meters since it had last been surveyed in 2004. A more recent survey, completed in 2017, showed it had switched tack and headed southwest, albeit at a slower pace.
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