Comment Re:Magnetic field. (Score 1) 77
For myself, I'm more partial to the De Meijer idea that calcium bergs in the mantle collect uranium; I would posit that a collection of such calcium bergs might make enough of a reactor to power Hawaii or iceland.
Or, for that matter, a plume under the Scotia Plate / African Karoo (at least until a large, shallow asteroid struck one of the collection, driving it to the center, it in the Permian).
Maybe another under the Carribean Plate â"Hudson bay, until the shock waves from the first super-critical explosion caused that one to detonate, too, splitting Pangea.