Vaughan Pratt,
It’s a good thing that gravity stops the Earth’s interior from going anywhere. Where pressure of unknown origin forces molten rock through the crust, gravity makes sure it doesn’t fly off into space.
I’m not sure about centrifugal volcanism. I assume you are joking, but If not you might explain how centrifugal force causes volcanoes in Antarctica. The oblate parts of the spheroid are at the poles, I believe, where centrifugal force is presumably least.
I’m always willing to learn. When and where are you publishing this novel theory?
Cheers.