The result was rapid cooling of about eight degrees over the next 100 years, Bunch said. The melting of the ice sheet and subsequent climate change would explain the water-based nature of the black mat.
The Laurentide Ice Sheet, IIRC, was about a mile thick. The heat from the detonation and the firestorms were sufficient to melt this? Really?
And then the temperature dropped eight degrees over the next 100 years? Which resulted in a lot of water, but did not contribute to a recovery of the Ice Sheet?
"The detonations were talking about would be about 10 million megatons."