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Carpal Tunnel
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OP
Carpal Tunnel
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In an article in New Scientist for Jan 12 about frogs, it mentioned that frog ponds are often called pingo ponds, or just pingos. I turns out that they were created by glacier long ago. An interesting site about them is at http://homepage.tinet.ie/~taghmon/histsoc/vol1/13pingos/13pingos.htm
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Carpal Tunnel
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Carpal Tunnel
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Max, wasn't Pingo Wal Footrot's niece? The Grey Ghost
The idiot also known as Capfka ...
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Joined: Jan 2001
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Carpal Tunnel
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OP
Carpal Tunnel
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Dear CK: "Pingo" was the antihelminthic Wal Footrot's niece took for her pinworms.
A bad tempered goat on the Footrot farm. Wal
originally got him to keep the grass down but he
seems to prefer Wal's fruit trees. Has a habit of
breaking loose from his chain and causing Wal a
great deal of stress.
Dear CK: I very much enjoy your childishness.
d
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old hand
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old hand
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Thanks wwh, for resurrecting the subject of glaciers. These comments were to be posted on Wordwind's Glacial Thread, but she stopped posting and the thread went away.
One item of discussion was... How did the airplane Glacial Girl and other Word War Two aircraft become buried beneath Two hundred feet of ice in only sixty years?
Last summer I read a well written book entitled The Two Mile Time Machine. Here is what they said about the burial of the Glacial Girl...
The Glacial Girl and her sister ships just happened to go down in the place in Greenland where snow falls most. There, snow accumulates in the winter with only a slight runoff in the summer. An annual transformation of six feet of snow into about two feet of firn (rounded, compacted snow) is a good measure. In about a hundred years at about two hundred feet in depth, the ice undergoes a final recrystalisation. The ice has now been transformed into about one foot of true glacial ice. With increasing pressure and at greater depths, this one foot of ice will be squeezed into a thickness of only six inches, this necessitates the the lateral flow of the highly compressed ice and so the ice field grows laterally and discharges ice as melt or icebergs at its perimeters.
So input equals output, therefore the ice pack doesn't grow in elevation, and any airplane resting on the ice can expect, through time, to enjoy a ride down through the ice and one day, a horizontal trip to the sea.
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Carpal Tunnel
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Dear Milum: Thanks for your explanation. Hard to keep in mind that solids can flow, like salt rising slowly because lighter than surrounding solids.
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old hand
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old hand
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Posts: 866 |
thanks for the info milum - feelings of vindication on this one!!!
WWEERREE BBAACCKK stales
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old hand
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old hand
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dunno if you're really asking CK - but it's Pongo.
homeagain stales
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Carpal Tunnel
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Carpal Tunnel
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Hard to keep in mind that solids can flow, like salt rising slowly
I may well be wrong here, but I believe that in glaciers the motion is by extrusion -- like squeezing toothpaste from a tube.
That is: ice is somewhat plastic under pressure. A glacier's bottom ice is under tremendous pressure from the weight of the ice and snow above, and that pressure extrudes the ice outward, just as a ball of clay will spread when you press down firmly upon it.
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old hand
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old hand
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In the current French hit movie Amelie part of the plot is based on the discovery of a WW2 aircraft that flew off course and crashed somewhere up north. Does anyone know if this Glacier Girl event is the same thing, or was it a common occurance?
By the way, if you haven't seen Amelie, I highly recommend it. It has a very intricate plot and it's funny, romantic and makes you think.
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Carpal Tunnel
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Carpal Tunnel
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Thanks for the input Jazz, the commercials looked really interesting but these days, at twelve bucks a ticket, we try to limit our movie outings to movies we are resonably sure we will like.
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milum, so do you know if that means the Glacial Girl would eventually have been squeezed a) flat and/or b) into the ocean.
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