[2] The level of the effect on a particular sample varies significantly, depending on the body of water, and more locally on depths, upwelling currents, and freshwater discharges.
But the effect is highly variable in space and time, and can reach 800 to 1200 14C years in Arctic regions.
The pot and some of the burnt crust at the bottom were tested which showed a Carbon-14 14C age of 700 years old.
[4] Since its initial discovery in the 1980s, a Viking burial site in England confounded archeologists.
In February 2018, a team out of the University of Bristol published a study attributing this to the large amounts of sea-based foods eaten by Vikings and placed the burial site in the late 800s.