On Friday, January 5, 2018 at 7:25:49 AM UTC-7, Gerald Kelleher wrote:

It is no surprise that those researching the link between the planet's rotation
and plate tectonics managed to exempt the Earth from the universal property of
differential rotation of the fluid medium beneath the crust

Unlike the atmosphere of Jupiter, or the gases of which the Sun is composed, the
magma of the Earth's mantle has a rather more generous quantity of another
"universal property", something known as _viscosity_.

The behavior of planetary atmospheres and interiors doesn't derive from analogy
- it derives from physical laws working out in the circumstances that exist on
each body.

John Savard