Now look at that http://www.nature.com/nsu/010920/010920-6.html.
"Kunio Kaiho of Tohoku University, Japan, and his colleagues have found
evidence in southern China that a massive impact converted huge amounts of
solid sulphur into sulphur-rich gases.
The released sulphur could have consumed 20-40 per cent of the
atmosphere's oxygen, and generated enough acid rain to raise the acidity of
the ocean's surface waters temporarily to that of lemon juice. Ocean life
would have been pickled."
Even worse than the K-T Strangelove ocean. Incredible.