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Joined: Nov 2000
Posts: 3,146
Carpal Tunnel
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Carpal Tunnel
Joined: Nov 2000
Posts: 3,146 |
n general, the entire earth's surface is criss-crossed by fault lines. Not all of them are detected unless they move - an earthquake. In 1990, the map of faultlines in the area of Wellington, New Zealand, looked orderly, two big faultlines and a few offshoots. Now you should see it - lines in all directions, all just waiting to suck you dooooooooown!  Not my area of speciality and I would defer to Stalesy. However, most Zilders are familiar with the mechanics of earthquakes and plate tectonics in general terms, and discuss them in much the same way as people in other countries discuss the weather.
The idiot also known as Capfka ...
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Joined: Sep 2001
Posts: 6,296
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2001
Posts: 6,296 |
Go ahead, Helen...drill away...but I'm promising you all you're gonna find is fool's gold and the appetitite of a hungry T. Rex Theresa Rex. Could be like opening Pandora's Box, come to think of it if I can still cogitate. Now where did I last see that lazy ol' pterydactyl sleepin' in a candleberry tree?
Brainless regards,
WWMM
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Joined: Jan 2001
Posts: 13,858
Carpal Tunnel
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Carpal Tunnel
Joined: Jan 2001
Posts: 13,858 |
Dear WO'N: I couldn't find anything on superplumes, but here is a good bit of information on basic earth science, plate tectonics, and subduction zones with diagrams: http://www.clas.ufl.edu/users/phiggins/Lecture8.html
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Joined: Mar 2001
Posts: 4,189
Carpal Tunnel
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OP
Carpal Tunnel
Joined: Mar 2001
Posts: 4,189 |
From Dr. Bill's link: Faults can be divided into two major categories: Strike-slip and Dip-slip, which describes the displacement of rock across the fault. There are also oblique-slip faults that are in-between strike-slip and dip-slip. I know a few dip-slips myself! nobody on this board, just a joke in general, couldn't resist the wordplay  Thanks for the great link, Dr. Bill. Good illustrations. And thanks for referring me back to that thread, stales. I missed that one (actually I missed all of October, and couldn't catch up with it all when I got back). Your first post there is a fine study of subduction. superplumesI guess this is the kind of word you can bequeath a variety of extended meanings to...which ones stick, and which go away? The Only WO'N!
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Joined: Sep 2000
Posts: 2,891
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2000
Posts: 2,891 |
Oh my god Helen, I can't belive the guy did that to himself. What an idiot!
Did you read all the way to the end? He got kinda worried when he felt a squirt in the brain-hole when he was taking a bong hit. Kinda says a lot don't it.
I am in awe at this. I can't believe people do this to themselves. This isn't cosmetic, like piercing or tatooing. This can be a) fatal while the procedure is being done, b) fatal because of the risk of infection, c) eventually fatal if you hit that exposed spot ... and did I mention FATAL. Sheesh.
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Joined: Oct 2000
Posts: 5,400
Carpal Tunnel
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Carpal Tunnel
Joined: Oct 2000
Posts: 5,400 |
Yes, i know the site.. did you notice the date? over 2 years old. and some sites with instructions are older.
but you know, people have been doing it since the ancient times.. there are ancient egyptian skulls with healed trepantions scars, some with more than one..and they didn't have hardened steel bits to drill.. they used hand tools, and no sterile water, or sterile anything..
i just think trepantions is a fun word, and have, suggest to rude, dislikeable people, they should find a hobby--have they thought of trepantions?...
since most people aren't aware of what it is.. and it doesn't sound like anything else.. it's a good line.
home trepanation became popuar (if that is the word,) about 10 years ago.. even TV shows have commented on it. (ER had an episode, for sure)
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Joined: Sep 2001
Posts: 6,296
Carpal Tunnel
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Carpal Tunnel
Joined: Sep 2001
Posts: 6,296 |
In today's news:
WASHINGTON (AP) - Two superplumes of molten rock appear to be powering through the boundary between the Earth's upper and lower mantle, perhaps feeding volcanoes and affecting movement of the planet's crust.
New evidence of the superplumes - located beneath the south central Pacific Ocean and southern Africa - comes from studies of seismic waves conducted by scientists at the University of California at Berkeley and reported in Friday's issue of the journal Science.
Smaller regions of magma rising to the Earth's crust power volcanoes and other hot spots.
But the superplumes come from far deeper, crossing the boundary between the upper and lower mantle about 400 miles deep, an area that had been thought by some scientists to impede the flow of material.
Researcher Barbara Romanowicz said earthquake studies until now have emphasized the dynamics of collisions between the planet's massive surface plates. When two of them crash together, one slips beneath the other in a process called subduction, and earthquakes and volcanoes can follow. "We think the superplumes play an important role as well," Romanowicz said.
The study seeks to focus attention on the hot material rising upward from the base of the mantle - the partially molten region that extends about 1,740 miles from the Earth's core to its crust, or lithosphere.
"The hot material brought under the lithosphere by the superplumes then spreads out horizontally toward mid-ocean ridges," Romanowicz explained. The ridges are often active volcanic areas.
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