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Posted by Jonathan on July 11, 2007, 9:00 pm
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"It all adds up to something happening here in this area, in this
particular layer, at this particular point in Mars' history," he said.
"Silica is a common hydrothermal chemical," pointed out
Jack Farmer,"
This is very interesting. We should take notice that Jack Farmer
is one of the leading....astrobiologists....on the planet. I've read
every one of his papers. His specialty is hot springs and early life.
"You could hear people gasp in astonishment," said Squyres.
Considering the staggering amount of silica, the soil seemingly had to
be formed by processes that require the presence of water."
They gasped at the high silica result? Why? Because that
indicates lots of water? Finding signs of water is rather old
news. Maybe the reason they 'gasped' is because of
...other implications this might have.
INTRODUCTION
The contribution of micro-organisms to amorphous silica
precipitation in modern geothermal hot-spring environments has
been the topic of intense study in the last three to four decades.
Here, we present a review on the field and laboratory studies
that have specifically addressed bacterial silicification, with a
special focus on cyanobacterial silicification. Studies related
to the biogenic silicification processes in diatoms, radiolarians
and sponges are not discussed, despite the fact that, in the
modern oceans (which are undersaturated with respect to silica),
the diagenetic 'ripening' of such biogenic silica controls
the global silica cycle
http://homepages.see.leeds.ac.uk/~earlgb/Publications/Benning%20et%20al_SMG%20chapter%202005.pdf
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