Natural Science Forum / Earth Science / Geology / February 2005

The most recent Scientific American (just got it yesterday) has an article
which says that agriculture and deforestation of the past several thousand
years have contributed to global warming and countered what otherwise would
have been slowly lowering temperatures that would have ...

The newspapers are an outdated branch of media, in times of Internet.
The deforestation that is in large part caused by them, it is the main
culprit in Global Warming.
The fossil fuel pollution is 40 (forty) times less importent.

My 9 year old dau was asking how earthquakes happen, what causes them
and the same for volcanoes.  She also wanted to know why we didn't get
volcanoes in the UK.  She was surprised that we do get earth tremors
here.

The Warmest in 1000 Years? Revisiting the Hockey Stick
By Roy Spencer  Published   01/27/2005
A science article that has been accepted by Geophysical Research Letters
casts serious doubt on the oft-cited claim that global temperatures are

I am looking for someone to go on a  8 - 14 day backpack trip with me this
spring in Central Alaska.
Anyone interested can find out much more at my web site.
http://www.terracotta1.com/

http://news.bbc.co.uk/2/hi/science/nature/4291571.stm
Our planet's murky deep sea sediments are a buzzing hotbed of life, according to
a report in Nature magazine.
Scientists suggest between 60 to 70% of all bacteria live deep beneath the

Now that we are getting some geological information back from Mars
Spirit rover about the mineralogy of the Columbia hills in Gusev
crater, I have been wondering what hypotheses are being considered for
the formation if this feature.

In reading an article on CNN's web site about the Brazilian land crocodile,
http://www.cnn.com/2005/TECH/science/02/17/brazil.croc.fossil.ap/index.html
I came across this amazing paragraph

I wouldn't pretend to speculate what is mixed but here is quite an
interesting picture, particularly in the lower-left.  Any comments?
http://mars.gh.wh.uni-dortmund.de/mer/spirit/400/tn/2P161875776EFFA600P2551L5M1_
L4L5L5L5L6.jpg.html

Will the melting ices in the poles accelerate the coming of the next
ice age? If yes, how? Like the one described in "The Day After
Tomorrow"?

So I'm designing a world where the thallasogen is ammonia rather than water.
Since ammonia is denser as a solid than as a liquid, it won't tend to melt
when compressed, so large piles of ammonia snow won't cement themselves into
solid sheets. Ergo, no glaciers.

In a recent trip through the eastern Free State, Republic of South
Africa, on the Lesotho border near a town called Smithfield, I came
across the objects (for want of a better word) in the attached
picture.

The proof in image on:
http://www.litterateur.org/index.php?mod=articles&ac=commentaires&id=136
Stef

Anyone knows where I could find information about the geological formation
of the Uranium Ore Deposits at the Colorado Plateau? More concretely of the
solutions (dissolved species/concentration/pH/T/...) involved in it?
Thanks a lot!

Since we are all reading our March Scientific American magazine, may I
direct the group to the article on the Big Bang?
The authors are talking about the expansion of space, not matter, from a
densely filled space to a sparsely filled one. Their analogy is to tape