[meteorite-list] Hibben and YD impacts

From: Sterling K. Webb <sterling_k_webb_at_meteoritecentral.com>
Date: Sat, 3 Apr 2010 00:41:36 -0500
Message-ID: <F6BC3816679946FFB8B5BCED06D9DE3D_at_ATARIENGINE2>

Dirk, E.P., List

You cannot answer all questions about a planet
by just looking at it with a robot, and this is one
of the questions still open.

http://en.wikipedia.org/wiki/Martian_spherules

    "The shapes by themselves don't
reveal the particles' origin with certainty.
"A number of straightforward geological
processes can yield round shapes," said
Dr. Hap McSween, an Opportunity science
team member from the University of
Tennessee, Knoxville. They include accretion
under water, but apparent pores in the
particles make alternative possibilities of
meteor impacts or volcanic eruptions more
likely origins, he said."

On the other hand...

    "On March 2, Opportunity mission scientists
reported that they concluded a survey of the
distribution of spherules in the bedrock. They
found that the spherules spread out evenly and
randomly inside the rocks, and not in layers.
This supports the notion that they grew in place,
since if their origin was related to volcanic or
meteoric episodes one would expect layers of
spherules as a "record in time" for each event.
This observation was added to the list of evidence
for liquid water being present at this rock site,
where it is thought the spherules formed."

Some recent papers on the spherules, one pro,
one con, one going somewhere else:

http://www.lpi.usra.edu/meetings/lpsc2005/pdf/2026.pdf

http://www.lpi.usra.edu/meetings/lpsc2007/pdf/1922.pdf

http://www.lpi.usra.edu/meetings/lpsc2007/pdf/2053.pdf


The answer? Get geologists on the ground where they
work best, rock hammer in hand, lab handy. Get them
each a thermos of hot coffee; it's cold there.



Sterling K. Webb
------------------------------------------------------------------------------
----- Original Message -----
From: "drtanuki" <drtanuki at yahoo.com>
To: "E.P. Grondine" <epgrondine at yahoo.com>;
<meteorite-list at meteoritecentral.com>
Sent: Friday, April 02, 2010 10:54 PM
Subject: Re: [meteorite-list] Hibben and YD impacts


Dear Ed and List,
  Respectfully, pseudo-science does not gain the respect of an apology.
The formation of a "black mat" has not be proven to be from a single
event and the evidence is still greatly lacking for their hypothesis to
become science fact. Bedtime story reading is just that, perhaps
fanciful and exciting, but not science. Best Regards, Dirk Ross...Tokyo

Also your statement that "blueberries are related to impact vapor
 condensates, not water condensates" is lacking merit of proof.

--- On Sat, 4/3/10, E.P. Grondine <epgrondine at yahoo.com> wrote:

> From: E.P. Grondine <epgrondine at yahoo.com>
> Subject: [meteorite-list] Hibben and YD impacts
> To: meteorite-list at meteoritecentral.com
> Date: Saturday, April 3, 2010, 9:34 AM
> Hi all -
>
> I was wondering if anyone here would like to apologize to
> Frank Hibben:
>
> http://www.nature.com/news/2010/100331/full/464657a.htmlp
>
> or to Dr. Firestone.
>
> By the way, the "blueberries" on Mars are impact vapor
> condensates, not water condensates.
>
> E.P. Grondine
> Man and Impact in the Americas
>
>
>
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Received on Sat 03 Apr 2010 01:41:36 AM PDT