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Politics : The Trump Presidency -- Ignore unavailable to you. Want to Upgrade?

To: TimF who wrote (67217)	4/18/2018 1:22:51 PM
From: combjelly	Read Replies (1) \| Respond to of 359076

Sigh. There you go again with your fan dance. Although there is solid evidence the extinctions hinged on the climate changes due to the runaway greenhouse effect, there were at least two impacts that could have contributed. Could have. It looks as if most of those extinctions occurred or were well underway before the impacts occurred, based on the fossil evidence under the enriched iridium layers associated with the impacts. But that isn't really relevant You said there was no sign of a runaway greenhouse effect in the past. You are wrong. Note that the two periods you name were the ones following the Permian-Triassic boundary and its associated runaway greenhouse effect. So the CO2 level peaked and then slowly dropped. It was all from the same event and not discreet events as you are trying to pretend.