The Environmental Protection Agency has previously reported some oil turning up in the sediment at the bottom of the Gulf , but has not determined whether it came from the Deepwater Horizon spill that erupted in April or whether it was already present . South Florida researchers find oil traces in undersea Gulf canyon . The scientists say the presence of hydrocarbons on a portion of the ocean floor suggests that there is an active source beneath the sea floor. Researchers say the oil could resurface later .
South Florida researchers find oil traces in undersea Gulf canyon . The scientists say the presence of hydrocarbons on a portion of the ocean floor suggests that there is an active source beneath the sea floor. Researchers say the oil could resurface later .