Re: Why it's Obvious the Tendril is a Water Feature

From: Andy Baker (respond_at_the.news.gr.oup)
Date: 09/03/04 

Date: Fri, 03 Sep 2004 13:11:25 GMT

Dude, I don't think the pot has much to do with this, it's the crack - OK
see.... you're in the bottom of a stadium sized crater in the middle of a
big flat plain - no doubt that the wind really whips through there on
occasion. There's probably a prevailing direction, but it can come from any
direction. Back to the point of the crater - as the wind is whipping by on
the plain, it dips down in to the crater, and these things called EDDY
CURRENTS - here's a picture -
http://www.tpub.com/content/aerographer/14312/img/14312_83_1.jpg and a
little text to go along with it... "An eddy is a circulation that
develops when the wind flows over or adjacent to rough terrain, buildings,
mountains or other obstructions. They generally form on the lee
(downwind or sheltered) side of these obstructions. The size of
the eddy is directly proportional to the size of the obstruction and speed
of the wind. Eddies may have horizontal or vertical
circulations that can be either cyclonic or anticyclonic."

(taken from this page
http://www.tpub.com/content/aerographer/14312/css/14312_83.htm )

You've got all sorts of stuff going on in the crater - wind swirling around
inside it like a whirlpool, twirling around at the edges,
so on and so forth, and there are many features in the crater that will
affect the wind in any number of different ways, and then
the whole picture changes when the wind direction changes and you have an
entirely NEW pattern of turbulence.
The circulations interact with not only the sand / dust, but witheach other,
producing even more complex circulations... see what I'm getting at? Oh and
add to that the fact that there
are many different particle sizes, weights, and colors / compositions. It
all adds up to some really fantastic geometry. Do
some research on dune formation and migration. It's basic earth science (I
doubt you even give a *** let alone actually
bother to read anything, but at least I tried)

Given enough time, that crater would mostly fill in with wind transported
sand. That process is beginning with those dunes,
and all those spastic patterns and crazy images man, they're like... from
all the wicked crazy turbulence and stuff. I'm gonna
bet that that crater showed up after the water was gone. If there was ANY
water there after, that baby would be pretty well gone or at least VERY
muted.

Make a long story short, quit analyzing *** beyond sorting out what's "cool
looking" and what isn't.
Somebody once told me "It's better to keep your mouth shut and let them
think you're stupid than
to open it up and let them KNOW you're stupid." and it wasn't jerry Garcia.

"Jonathan" <jon@listserv.gsfc> wrote in message
news:j7WdnZa_C_oE5avcRVn-hw@giganews.com...
>
> "George" <George@george.net> wrote in message
> news:xpuZc.73062$_h.24589@bignews3.bellsouth.net...
> >
> > "Dennis M. Hammes" <scrawlmark@arvig.net> wrote in message
> > news:41358A18.66A9C1D3@arvig.net...
> > > Jonathan wrote:
> > >>
> > >> Tendril close-up
> > >>
>
http://marsrovers.jpl.nasa.gov/gallery/all/1/p/211/1P146917874ESF35BGP2568R1M1.HTML
> > >>
> > >> In what I've read about dunes, one common feature that is almost
always
> > >> present is that the dune displays the prevailing wind direction.
> > >> In common sand ripples, the steep slope faces into the wind
> > >> while the broader slope faces downwind. This is also true
> > >> for water ripples.
> > >
> > > Well, you sure got /them/ backward. Both.
> >
> > He never lets the facts stand in the way of a perfectly idiotic post.
>
>
> So what's your explanation for the picture above? Do you have
> one? Which way is the wind blowing? I say wind has nothing
> to do with it at all.
>
>
> s
>
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>
>
>
> >
> >
>
>

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