Re: A testing time..

On Feb 2, 9:57 pm, don findlay <d...@xxxxxxxxxxxx> wrote:

The arc shape is far more supportive of gravitation spreading
(vertical 'convergence) than it is of lateral convergence

So your overthrust exhibits a typical angle of repose where it
intersects
the trench?

and the scree analogue at the top of the page.

These typically have an angle of repose . A trench dip angle is
steeper .

Tightness of the arc is a measure of the depth or thickness of the
crustal layer doing the collapsing,

What was lifted and then collapsed?

rate of spreading,

Wrong shape!

..and probably
some others.

?????
"Location of the cusps"?

The ends of the curve? Are you calling these cusps?


 Has also been answered.  Would you like me
post the link (in the interest of public education?) (Or would you
filter it out as bull***, because it doesn't come from the mainstream
known-already?)

Post it !

"Solve it and become famous"?  Solved long ago.  The other?  Now that
IS bull***.

You and Florian point to finished G collapse (The Nappes) . You invoke
early
stages of that for western Pacific Wadati/Benioff Zones . Where is the
*missing
link* that is intermediate to these stages? In effect, that place
where expansion
via this mechanism is observed ? There is geochemical evidence for 2 W/
B Zones under
N. America . Where is the expansion your paradigm predicts in N
America?

When bedded carbonates accumulate, imitating the collision of an
oceanic plate into a continental, one sees angular cones, not arcuate
folds.
Poor analogy!
This is new (to me)  How does the accumulation of bedded carbonates
immitate collision?

The mélange of the Coast Range of California suggests
continental collision,

It suggests gravitational collapse far better

Melange suggests uplift and erosion , then compression . Over time !

the nappes of the Alps suggests compression,

...as do the Alps:-
"Modern workers have tended to stress the importance of vertical
crustal movements in the development of Alpine nappe piles.  The
upheaval of one or more welts in the mobile belt is thought to have
caused unstable units to slide under gravity, accumulating as cascades
of recumbent folds or detached sheets near the foot of the tectonic
slope. "    (Read and Watson, 1975. Introduction to Geology, v.2.
Earth History, pps 195-196)
(You're a bit behind the times here, Bruce)

the doubling of the crustal thickness of the Tibetan plateau suggests
compression.

overthrusting  (gravitational collapse) better

J. Tuzo Wilson, however, assumed the Earth was cooling (in the absence
of significant radioactive heating), and there was a depth at which
the consequent contraction became null,

He implied cooling from the inside out?

expansion occuring above that
depth. He suggested island arcs are arcs because of the Earth's
expansion.

But gave no logical mechanism to account for them .

Well, he was dead right of course.  They *are* in support of Earth
Expansion, ..as well as the arcs that describe the mountain belts of
Eurasia.  

I would expect some *typical* angle of repose where upwelling material
sits atop existing material in the case of G collapse . In addition
any
sediment derived by erosion from this upthrust material would exhibit
that same angle of repose . Erosion thrusts should be evident.

Though I don't know about his null contraction due to
cooling.   Sounds more like his expansion should occur in the hotter
part below, not the cooler part above.



Prove it. :-)

Bruce

Well, of course the arc shape proves nothing of convergence in the
sense meant by Plate Tectonics.- Hide quoted text -

Prove that!

Brad

.