DT: " I wonder how many geoscientists have considered Carey's
explanation?"
> As you are aware, I have considered Carey's earlier model. This one on
> global torsion would require an external force as near as I can see. You
> are talking about placing a differential torque on the crust of the earth.
> I don't see how the plastic mantle and core could do that.
Chapter 21 of Carey's book "Theories of the Earth and Universe"
addresses this issue. He argues that earth expansion leads
inevitably to global torsion, and an external force is not required.
"Half a century ago, I realised that the earth had suffered sinistral
shearing on a global scale, but saying so then branded me as a
rat-bag because at that time transcurrent faults of even tens of
kilometers were outside orthodox thinking, still less offsets of
hundreds or thousands of kilometers. ... It was not until the 1960's
that such movements on the scale I had indicated were widely
accepted." (p.276)
Carey identifies 7 expressions of global torsion and finds positive
things to say about most of them.
Best regards,
David J. Tyler.