Re: Earth expansion - parameters for discussion

From: Carsten Troelsgaard (carsten.troelsgaard_at_mail.dk)
Date: 12/31/04 

Date: Fri, 31 Dec 2004 15:29:34 +0100

"David Ford" <Nospam@internode.on.net> skrev i en meddelelse
news:41d51536@duster.adelaide.on.net...

> It is more than a slight dynamic imbalance as you suggest, about three
> quarters of the length of ‘subduction zone’ required is NON-EXISTENT!
>
> That's not just a little dynamic-imbalance goofy, it's what’s called
> totally IMPOSSIBLE … IF subduction were in fact a real process at all, as
> plate tectonics merely presumes.
>
> BTW, you act like geology of recent years has only found more (assumed)
> 'subduction zone' in Cascadia, but you do also realise Antarctica is
> actively rifting ... and on top of this is also 100% surrounded by
> extending new crust formation along the southern ocean's MORs, and by a
> N-S continental rift in Africa, and massive extensional MOR complexes in
> the Atlantic and Indian Oceans, and the massively fast spreading occurring
> in the east Pacific MOR.
>
> The length of MOR and continental rifting in the Southern hemisphere is
> around SEVEN times the length of the supposed 'subduction zones'.
>
> That is not a dynamic imbalance, it's just plain IMPOSSIBLE, and
> incompatible with the meagre amount of subduction zone.
>
> Where is all that new crust going to go Georgie old boy? It sure as hell
> isn't going into the northern hemisphere, ... because, you guessed it! …
> the Arctic is rifting open as well!
>
> Plate Tectonics? phft!
>
> The utter brainlessness of plate tectonics and its “George” types is
> beyond the pale.

Why shouldn't the Earth's crust have a modest extend of subductionzones
compared to spreading ditto? The start of an extension is far easier
achieved than the onset of a compressional subduction or a mountainbuilding
process. The logical consequence is, that subduction or mountainbuilding
happens in a faster pace. Considering the pace with which 26 m's of crust
that presumably disappeared beneath Sumatra as the island recently moved
this distance southwest seems convincing to me.

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