Re: Rotational dynamics and crustal motion


"oriel36" <kelleher.gerald@xxxxxxxxx> wrote in message
news:1176452400.183842.27740@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Planetary shape and specifically the deviation from a perfect
sphere,perpendicular to rotational orientation of the planet is a
correlation which has been known for centuries.The moving Earth,and
especially axial rotation in the molten/flexible interior generates
the spherical deviation due to the known fact that the material
rotates at 1000 miles per hour at Equatorial latitudes and diminishes
to no speed at at at the poles.A material that is in a molten state
would tend to organise into shear bands owing to differential rotation
hence the new correlation between the mechanism for spherical
deviation and crustal evolution/motion.

Convections cells are stationary Earth concepts for they do not
recognise rotational orientation and are geographically obscure in
where they are supposed to encounter the fractured crustal and where
they descend and cause the crust to follow suit -

http://pubs.usgs.gov/gip/dynamic/graphics/Fig32.gif

The composition of the molten material in contact with the fractured
crust determines the degree of planetary shape deviation and what
forces are involved at the boundaries of the individual fractured
plates,beyond that it is presently impossible to say presently in a
more detailed way how the common rotational mechanism ties planetary
shape and crustal evolution/motion together.

What you say makes sense, however your model is wrong. There are planets
that may fit your model, but Planet Earth is not one of them.

Convection is the internal movement of currents within fluids (i.e. liquids
and gases). It cannot occur in solids due to the atoms not being able to
flow freely. Convection may cause a related phenomenon called advection, in
which mass or heat is transported by the currents or motion in the fluid. In
the case where the advected substance is heat, the heat itself may cause
fluid motion, so the problem of heat transport (and transport of other
substances in the fluid due to it) may become quite complicated.

Differential heating of fluids may itself cause convection in a gravity
field, due to variations in density due to a transfer of heat and subsequent
fluid expansion, combined with differential buoyancy forces on the different
parts of fluid which have differing densities. This type of purely
heat-driven convection in gravity fields is sometimes referred to as
"natural heat convection," in order to distinguish it from various types of
forced heat convection (i.e., heat advection not due to buoyancy of
heating). In forced heat convection, transfer of heat is due to movement in
the fluid from forces other than heat, such as pumps or natural and
artificially-driven mechanically-pushed fluid flows (i.e., flow from
external motive forces, such as occurs in rivers or pumps). In addition,
buoyancy forces in gravity fields which result from sources of density
variations in fluids other than those produced by heat, such as variable
composition (for example, salinity), are frequent convection causes.

The outer core is the only layer of the planet that is liquid. It is
overlain by the mantle (solid to plastic, but predominately not liquid) and
the crust. The mantle comprises 70% of the earth's volume. The liquid
outer core is a very small part of the earth's mass, contained by the mantle
and crust. The liquid outer core does not come into direct contact with the
crust (except for a few volcanic events, perhaps), so how can it cause
"deviation and crustal evolution/motion". The crust moves on the plastic
mantle, which is solid on nature, not liquid.

But then I'm not a geologist, but I do believe the above is correct.


http://en.wikipedia.org/wiki/Outer_core#Core


.

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