Re: A testing time..



Bruce Bathurst wrote:

On Feb 2, 6:57 pm, don findlay <d...@xxxxxxxxxxxx> wrote:

"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)

Not that far behind, I hope.

Yes, well after three years of being unable to buy journals, I
considered myself incompetent to teach - and stopped. However, this
was a decade after 1975. Can't find a reference to this book: was this
written by H.H. Read and Janet Watson? That would be fascinating
reading.

In the late 1970s, I read only primary literature; but I would
definitely have examined this book, if I had seen it. To us
petrologists, Janet Watson (the wife of Arthur Holmes) was famous (or
notorious) for her 'basic front' of metasomatism, which Norman Bowen
called a 'basic affront' to plutonism, with a mumble. :-)

My introduction to geology was in 1964 (as an NSF fellow at the
Colorado School of Mines), when we read both

Velikovsky, I. 1950. Worlds in Collision. NY: Doubleday; and

Holmes, A. 1965. Principles of Physical Geology. NY: Ronald;

and were asked to compare the explanation of geological phenomena in
each. Concomitantly, we took a seminar on the philosophy of geology.
Have you a more complete reference? Thanks!


Bruce

PS. Never mind: found it in Google Books! Yes, that's who wrote
it. :-) When I next can get out of the house, I'll see whether the
local university carries it. Sounds entertaining. I love H.H. Read's
writings. Great for ideas.

PPS. I'm now quarantined with pneumonia, from having taken my
grandaughter on a tiny science walk yesterday. However, along the
sidewalks, I noticed the cracks, arcuate toward the center, appeared
to grow from one end of the crack to the other. The ends of the cracks
didn't seem significant, but the innermost point, where the crack is
parallel to the side of the walk, grew a rather straight crack toward
the side. It would be interesting to look at the center of the arc on
Google Earth, and see if there's an unusual phenomenon occuring along
the coastline there.

This is how I see it (since you seem to be interested).
http://users.indigo.net.au/don/cpr/pancurves.html
Nobody else around here much is.

I echo Gerald Kelleher's concern here (Oriel36), who said:-
----------------------------------------------------
"The question to those who adhere to plate tectonics is - what ,for
goodness sake,do you think you are doing by ignoring rotational
dynamics ?"
http://tinyurl.com/aefwys
-----------------------------------------------------

....and of course Florian's 'upduction' - the accommodation of the
crust to the extrusion of the mantle. The fuller picture needs an
animation, which one day I'll get around to doing (maybe). I've
detailed it as a series of stills on my site.

Convection? Forget it. It's an artifact from the realm of the
underworld - geophysicists trying to appropriate 'relevance'.
Earthquakes are fine, but for their derivative conceptualisations? ...
forget it. They're awa' with the faeries.. Changelings all...
Intellectually simply not in the mold of the Human race...
.

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