sentences:  The ice was disrupted at the point of impact, temporarily exposing an area of seawater approximately in diameter; ice floes in the area were scattered, upturned and displaced.South of the impact area, a by blackened patch was visible where fuel from the aircraft had burned—this area was highly contaminated with JP-4 aviation fuel and radioactive elements that included plutonium, uranium, americium and tritium.Plutonium levels as high as 380 mg/m2 were registered in the area.