Scientists cast doubt on theory of what triggered Antarctic glaciation

[unable to retrieve full-text content]Scientists have found geologic evidence that casts doubt on one of the conventional explanations for how Antarctica's ice sheet began forming. They report finding an ancient volcanic arc in the Scotia Sea that might have prevented the Antarctic Circumpolar Current from forming until millions of years after Antarctic glaciation began.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/most_popular/~3/yQwufYTJY1Q/130711142405.htm

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