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2) Flat earth
3) No internal heating
4) Constant viscosity and rheological properties.
How realistic is this? Are there solutions to these problems?
OCE 661 After almost 4 decades, many problems are unresolved. Simple
convection cannot produce such things as strike-slip plate
boundaries, narrow mid-ocean ridges, or hotspot plumes.
If you are a little confused about how plate driving forces are
described, and how a plate can rotate around a vertical axis due
to convection, that’s ok. There is no consensus about the relative
importance of these forces, or on the existence of some of them.
How the above problems are being addressed is complex.
While convection is almost certain to be responsible, we know
little of the deep structure. First lets look at the current view of
OCE 661 What to we really know about mantle convection?
In reality, not very much. We live at the upper
boundary layer, on a plate, at least I do. So we think
we know a little bit about what...
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- Winter '14