(CNN) -- A team of researchers in the Gulf of Mexico say they found an oily layer as thick as two inches coating the sea floor in some places, and they believe it may be from the BP spill.

"I think what we're seeing is oil that was on the surface, that has sedimented down to the bottom," said Samantha Joye of the University of Georgia.

Where did the oil go? Researchers point to sea floor - CNN.com