Quote:
Originally Posted by JonClarke
I aam yet to be convinced that there is a problem that needs to be accounted for. The lines of evidence for anything in the Hadean are very slim and very much assumption driven. I would be extremely sceptical of any strong claaims about anything about surface conditions on the Earth before 3.5 GA (which are the oldest well preserved suprcustal rocks).
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Oh ok. You mean: 1) assume for now the hot surface Hadean is correct and 2) the cold surface claim is still weak? I'm ok with that.
I would however, be interested to know how the cold surface people decide to account for this early cooling.
Quote:
Originally Posted by dgavin
The numbers are basically guess work, but theroretical models show the heavier a planet gets the less assistance it needs for techtonics.
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Thanks.