Re: Plate Tectonics Information

On Feb 24, 10:38 pm, brad <lbjohnson1...@xxxxxxxxx> wrote:
On Feb 24, 11:35 am, oriel36 <kelleher.ger...@xxxxxxxxx> wrote:





On Feb 24, 1:04 pm, brad <lbjohnson1...@xxxxxxxxx> wrote:

On Feb 19, 9:24 am, Alan Kellogg <mythusm...@xxxxxxxxx> wrote:

The standard search engines keep bringing up the standard sites with the
standard information. I'm looking for sites and information that is a
bit more up to date. If you happen to know of such, post them in your
reply, a separate line for each URL.

" The Restless Earth " by Nigel Calder old but basic essentials. then
maybe the newer stuff will fall into place. or at least the
complexities will become more apparent and you can assign order to the
newer research.

The new research is occuring in a different discipline,specifically
generalised dynamics of rotating stellar objects and the correlation
between deviations from a sphere and maximum Equatorial speeds -

http://www.newscientist.com/article/mg17123022.300-stars-bulging-wais...

http://en.wikipedia.org/wiki/Vega

What most forget is that differential rotation occurs for our
Sun,Altair and Vega with much greater Latitudinal differentials for
the stars rotating faster and with greater devaitions from a perfect
sphere.In generalised terms ,their is a correlation between
differentail rotation,maximum Equatorial speed and the shape of the
stars.The significance for planetary geometry and geology is that
there is a good  reason to believe that differential rotation is
occuring as the Equator rotates at 1000 miles per hour and diminishes
to 0 miles per hour at the poles,as the molten/flexible interior of
the Earth is not exempt from the generalised rules for rotating
celestial objects in a fluid state (mantle).
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  A star is not encased in a rocky shell. however , the core is .  and the outer core is the liquid part . is it flexible enough to absorb any deviations from sphericity in the inner core ?  without transmitting said movement to the surface ? I'd expect some earthquake epicenters to originate lower than 650 miles if that were true. I'd expect seismic waves to relay something about isostatic rebound in the core if that were true.
In short,this replaces 'convection cells' with rotational
differentials as a better mechanism for crustal motion and grafts in
crustal motion across planetary shape among other things.

The reason that Wegener was so successful and so despised  was his
insistence to include data from other disciplines -

"Scientists still do not appear to understand sufficiently that all
earth sciences must contribute evidence toward unveiling the state of
our planet in earlier times, and that the truth of the matter can only
be reached by combing all this evidence. . . It is only by combing the
information furnished by all the earth sciences that we can hope to
determine 'truth' here, that is to say, to find the picture that sets
out all the known facts in the best arrangement and that therefore
has
the highest degree of probability.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    in earlier times ? now you speak of the birth of the planet ? do you wish to discuss that ?  in terms of rotational dynamics ? " The Origin of the Solar System.  " edited by Dermott. you'll find that rotational dynamics is not ignored in solar or planetary genesis.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Further, we have to be prepared
always for the possibility that each new discovery, no matter what
science furnishes it, may modify the conclusions we draw."  Wegener

While it may appear idealistic to some who like to protect their own
disciplines from intrusion by others,the flip side generates things
like a geostationary 'convection cell' mechanism which is
unsatisfactory in this day and age.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Why?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            is easier to draw on experience
with what is occuring with stellar dynamics and adjust them to the
Earth's composition that dump on 'convection cell'  and insofar as the
new research for plate motion looks like it has stalled,the truth is
that it is waiting for that spark which fuses astronomy with
geology,at least within reason while keeping disciplinary identities
seperate.

stars are not terrestrial planets !

Calm down,I do not want to be the guy who is explaining that stars
and planets rotate to a man who is dead set on his geostationary
notions that are 'convection cells'.,unfortunately many have an
aversion to rotational dynamics and there is nothing I can do about
that.


show me something . where do
particles exhibit behavior attributable to any " rotational dynamic
" ?

Again,calm down,you are all over the place.I already showed you the
correlation between maximum Equatorial speed,differential rotation and
degrees of deviation from a perfect sphere as they occur in stars,if
you cannot make the simple leap and apply the generalised dynamics to
the Earth's then it would not matter what I would show you or anyone
else.So,do you want me to treat you like an adult ?.






wouldn't you expect benthic clays  to show evidence of coriolis
forces ?

Perhaps you need to spend a little time with uni-directional
differential rotation and forget coriolis forces for a while -

http://www.astronomynotes.com/starsun/sun-rotation.gif

The differentials bands all head in the same direction and you go
along with it or you do not -

http://www.lcsd.gov.hk/CE/Museum/Space/EducationResource/Universe/framed_e/lecture/ch11/imgs/rotation.gif


all you do is offer philosophy . don't expect me to accept
that plate motions on the order of millions of years compare to gas
models on the order of days ;

Here is what you do,stick with your geostationary convection cells
which require no link with rotational dynamics or the shape of the
Earth let alone crustal motion.This way you will not get upset and it
spares me from wasting my time demonstrating the consequences of the
Earth's axial rotation has geological affects.


 because you believe it must be so. and
how do you accept convection in stars and gas planets while
disallowing it in terrestrial planets?

It stands to reason that if you allow differential rotation as a
generalised dynamic in stars to exist,and it is an observed motion by
the way,then there is no reason why it cannot occur in the very hot
and very fluid rotating mantle of the Earth.Convection is only
speculated to exist hence differential rotation takes priority even if
I am the only one promoting it as the main cause of our planet's
deviation from a perfect sphere.


if rotational forces acting
differentially according to  latitude do come into play why are there
not large scale transform faults running the length of all major
continents ?

Now I really think you are better off with what you believe in terms
of geostationary 'convection cells'.The mantle rotates at different
speeds from Equator to poles generating the deviation from a perfect
sphere and moving the crust in proportion to the effects of whatever
the composition,viscosity and size of the shear bands may be.The
proportion of crustal generation on the seafloor is consistent with
differential rotation and I assure you that I am extremely reluctant
to venture into surface correlations so soon.The fact is that the
second largest geological feature - the mid -Atlantic ridge displays
traits on the interior mechanism boith in its orientation running
parallel with rotation and in its proportion of crusta generated..-

http://www.windows.ucar.edu/teacher_resources/magnetism/mid_atlantic_ridge_10_inch.jpg




the simple fact is that the electromagnetic force
overwhelms all other forces in terrestrial dynamics ( and in solar ).
oh, and astronomy and geology both rely on chemistry... for both our
arguments. geochemistry, nuclear physics , geophysics, you draw the
line . why would you assume only one discipline is involved?- Hide quoted text -

- Show quoted text -

Ah assumptions !,why would you and your colleagues assume that
rotational dynamics,drawn from astronomical studies does not affect
evolutionary geology.The non confrontational approach I took years ago
is that the outlines of plate tectonics is fine but the 'convection'
mechanism assigned to the motion of the crust is appaling by any
standards.I am even content to enjoy that the motion of the fracured
crust across the less than perfect sphere would have effects such as
those rare intraplate events due to the adpation of the crust from one
profile to another.

What do you wish me to say further is you wish to remain ignoring
rotational dynamics - 'Eppure si muove' perhaps.


.

Relevant Pages

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