[Errant]

I favor my frictional heating and the pumping of molten materials through the lithosphere by a solid core under outside gravitational influences, over your nuclear reactions at the core theory. :)

I wouldn't argue there isn't some internal heat being generated by a nuclear reaction process. I just don't see evidence to support such a process on a massively large enough scale, and one lasting eons that would be needed to cause the amount of change the Earth's geology indicates has occurred throughout its history.

I agree with you on the remainder. I'm trying to better understand how a frozen dry world sitting on top of well insulated heat source, goes about becoming unfrozen in roughly 12K years. Determining how this happens is difficult.

I would imagine heating of the oceans plays a much larger role than heat transfer beneath the continents.

[Errant]

becoming unfrozen in roughly 12K a few hundred years

[machogirl]

Been rather quiet on the large-quake scale.