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"pete" <vincent@xxxxxxxxxxxxxxx> wrote in message
news:du0ram$6ur$1@xxxxxxxxxxxxxxxxxxxxxxxxx
> on Sat, 25 Feb 2006 22:12:53 GMT, George <george@xxxxxxxxxxxxxxxxxxxxx>
> sez:
>
>
> ` The MOR spreading centers themselves, in a sense, are a sort of linear
> ` hotspot. If you look carefully at spreading centers, such as the East
> ` Pacific Rise, as shown in the link below:
>
> ` http://marineemlab.ucsd.edu/Projects/EPR2004/Plots/EPR_view3d1.jpg
>
> ` You will snote in that image that volcanoes form on the rise and then
> are
> ` carried off of it on either side through plate spreading (I suspect
> that
> ` volcanoes similar to the ones discussed for Vancouver are likely to be
> ` found on the ocean floor to the west of the spreading center there). I
> ` think that is the same kind of mechanism that we are seeing in
> Vancouver,
> ` and I think this is different than what we see with Yellowstone. And
> note
> ` that usually with these sorts of spreading center volcanoes, as they
> move
> ` off the spreading center, they eventually become extinct. Yellowstone
> is
> ` located far from any recognized MOR, has erupted relatively little
> oceanic
> ` basalt, and certainly is not extinct. Though there may be an indirect
> ` relationship with what has occurred off the west coast, I think the
> ` Yellowstone hotspot has a different, though related, origin. I think
> ` Yellowstone is more directly related to Basin and range geology than to
> the
> ` Pacific Northwest coast. But that is just my humble opinion, about
> which I
> ` reserve the right to change without notice. :-)
>
> ` Here is a link to a report published by Christiansen, et. al. on the
> origin
> ` of Yellowstone. Read particularly the conclusions, as they are
> germaine to
> ` this discussion:
>
> ` www.dur.ac.uk/g.r.foulger/Offprints/Yellowstone.pdf">http://www.dur.ac.uk/g.r.foulger/Offprints/Yellowstone.pdf
>
> Thanks for the links, George. Great, much to think about. I wrote
> a post asking for help deciphering some of the stuff in the pdf,
> but my terminal program suddenly decided to crash, and I lost it,
> don't have time or energy to rebuild it now, perhaps later in the
> week...
>
Anytime, Pete.
George
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