Posted on 07/09/2007 2:56:55 PM PDT by blam
Thousand of new volcanoes revealed beneath the waves
10:04 09 July 2007
NewScientist.com news service
Catherine Brahic
The true extent to which the ocean bed is dotted with volcanoes has been revealed by researchers who have counted 201,055 underwater cones. This is over 10 times more than have been found before.
The team estimates that in total there could be about 3 million submarine volcanoes, 39,000 of which rise more than 1000 metres over the sea bed.
"The distribution of underwater volcanoes tells us something about what is happening in the centre of the Earth," says John Hillier of the University of Cambridge in the UK. That is because they give information about the flows of hot rock in the mantle beneath. "But the problem is that we cannot see through the water to count them," he says.
Satellites can detect volcanoes that are more than 1500 m high because the mass of the submerged mountains causes gravity to pull the water in around them. This creates domes on the ocean's surface that can be several metres high and can be detected from space.
Data overload
But there is a multitude of small volcanoes that have gone undetected. The only way of identifying them is to manually find their outline on sonar measurements taken from ships.
(Excerpt) Read more at environment.newscientist.com ...
Oh NOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!
That Northern Hemisphere Global Warming known as Summer will kill us all.
Rivers have been dumping dissolved salts from land into the oceans, for billions of years.
self-ping.
prove it...saying it don’t prove it so.
http://en.wikipedia.org/wiki/Black_salt
This salt is dug up from the ground. It has way too high a sulphur content for it to have been underground reserves of dried-up ancient seas.
This isn’t to be confused with halite, which is sodium chloride from underground deposits.
good dd’s but you did not prove 30 k years science fact much less a billion as quoted by you
I’m truely not being advesarial. A million or a billion years ago.........cannot science fact be proven
As soon as Bush signs LOST you'll be able to get a gold recovery permit from the UN.
Come again, I didn’t get what you were asking last...
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Sodium (for the sodium chloride, common table salt, which is the most abundant in the oceans) could have reached the waters from the rocks of the Earth, but chlorine is much rarer, and may be extraterrestrial in origin (not ET, just from debris hitting the Earth).
Small Comets and Our Origins
University of Iowa | circa 1999 | Louis A. Frank
Posted on 10/20/2004 2:13:25 AM EDT by SunkenCiv
http://www.freerepublic.com/focus/f-bloggers/1250694/posts
so enuf comets of sodium all at a soon enuf time to salinate the ocean, why are they not still acomin asalinating?
Bright Bank, and underwater salt dome on the continental shelf of the Gulf of Mexico, showing relative height above the seafloor, or depth below the surface of the ocean. The warm colors are highest (or shallowest) and the cold colors are lowest (or deepest).
In 1971, petroleum geologists in the southern Gulf of Mexico took a bizarre photograph near the Campeche Knolls oilfield, a region where the evaporite deposits below the seafloor have warped up into domes. The photo seemingly showed a small patch of asphalt covering the seafloor. Such an exposure, however, would mean that hot tar was erupting in the deep, cold Gulf, far from any spreading center or ridge — a scenario unheard of at the time.
At the edges of the flow field at Chapopote in the southern Gulf of Mexico, small clusters of tubeworms grow under eroded asphalt deposits, along with living bivalve shells and galatheid crabs. Photos by Ian MacDonald, Texas A&M University, Corpus Christi.
They are.
I know that. You miss the point that such instruments are incapable of measuring an overall average. That would be defined as the surface of a sphere which represents the surface of the ocean when all distorting factors are removed. Those factors include tides, gravitational bulges, rotational bulge, seismic effects, wind, and atmospheric pressure. In addition plate tectonics which cause the continents to move laterally also cause the apparent surface of the land masses to move up and down further obscuring the measurement. All of these effects impact the actual ocean surface and cause it to vary from the oblate spheroid which represents the average.
Why do we need to know the average? So that we can then measure any change as predicted by global warming theory. The GW crowd has been throwing around numbers ranging from fractions of an inch to twenty feet or more. Granted that if sea level were to raise 20 feet you'd notice. I believe the actual change will prove to be much less and therefore likely to fall within the range of uncertainty with which the actual average is known.
Regards,
GtG
I'll say. Here's our latest large one.
Ice Age Ends Smashingly: Did a comet blow up over eastern Canada?
Thanks Blam. I think there’s an FR topic about that?
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