[BR-Crater] BR-Crater Digest, Vol 6, Issue 4

Wed Aug 8 20:48:22 PDT 2007

Thanks for the interesting material. You mentioned a magnetic rock. Has 
anyone done a survey of the more remote ie high dry lake beds looking for 
meteorites. It seems these places would be a good place to look for them.

Charlie Wittman, Director, Advocates for Children and Families, TheACF, on 
BOD of AFRA, CCHR Board of Advisors, theacf at hotmail.com ,
PO Box 10, Los Gatos, CA 95031, 408 395 6999 ACF Hotline
Main ACF WWW site:: http://www.theacf.org
CRIN: http://www.crin.org/organisations/viewOrg.asp?ID=1774
AFRA: http://familyrightsassociation.com/
CCHR: www.cchr.org
LUNAR #1405, http://www.lunar.org/
Aero-Pac # ________  http://www.aeropac.org
NAR [L1] #85655, http://www.nar.org/
Tripoli [L1} #11202
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----Original Message Follows----
From: br-crater-request at thunder.net
Reply-To: br-crater at thunder.net
To: br-crater at thunder.net
Subject: BR-Crater Digest, Vol 6, Issue 4
Date: Wed, 08 Aug 2007 12:00:03 -0700

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Today's Topics:

    1. photos and more analysis from Upper High Dry (Ian Kluft)
    2. some of the rock samples are magnetic (Ian Kluft)

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Message: 1
Date: Tue, 7 Aug 2007 13:20:19 -0700
From: Ian Kluft <ikluft at thunder.sbay.org>
Subject: [BR-Crater] photos and more analysis from Upper High Dry
To: Black Rock crater discussion <br-crater at thunder.net>
Message-ID: <20070807202019.GA26955 at thunder.sbay.org>
Content-Type: text/plain; charset=us-ascii

Here are the photos from Sunday's visit to Upper High Dry lakebed:
    http://ian.kluft.com/blackrock/upperhidry-20070805/

I delivered the rocks from Upper High Dry to Brad for him to look at.
He's encouraged about the kinds of rocks we're finding there, particularly
since it's so easy to find breccias and melt rocks, which should be the
case in an impact site.

As we talked about them, we referred back to the "Traces of Catastrophe"
text again.  Referring to a diagram showing the structure of a typical
impact crater, what we've found is probably "fractured basement rocks".
If so, shocked rocks would be located above them.  So next time we return
to Upper High Dry, we need to check higher up in the rocks where we were
on the north side to search for shatter cones.

"Higher up" is available - we only went 1/3 of the way up the slope.
But it becomes steeper until it's a sheer cliff at the top.  A nearby
4x4 trail (which was explored on the Stratofox 2 trip in August 2003)
probably goes up through those layers at a more gentle slope.  Both
places should be options to look for shatter cones.  I wouldn't go to
either without a larger group and more vehicles.

Photos from Stratofox 2 of the 4x4 trail we'll want to explore again:
    http://ian.kluft.com/blackrock/sf2-200308/sat-br-range.html
    http://www.chaosring.org/~seanl/photos/Stratofox%202/img058.jpeg.html
    http://www.chaosring.org/~seanl/photos/Stratofox%202/img059.jpeg.html
    http://www.linwin.com/stratofox/2003-08-22/tn/sfox-20030822-36.jpg.html
    http://www.linwin.com/stratofox/2003-08-22/tn/sfox-20030822-37.jpg.html
    http://www.linwin.com/stratofox/2003-08-22/tn/sfox-20030822-38.jpg.html
    http://www.linwin.com/stratofox/2003-08-22/tn/sfox-20030822-39.jpg.html

------------------------------

Message: 2
Date: Wed, 8 Aug 2007 01:16:33 -0700
From: Ian Kluft <ikluft at thunder.sbay.org>
Subject: [BR-Crater] some of the rock samples are magnetic
To: Black Rock crater discussion <br-crater at thunder.net>
Message-ID: <20070808081633.GA30694 at thunder.sbay.org>
Content-Type: text/plain; charset=us-ascii

Brad told me that among the rocks brought back from Upper High Dry, the
"red ones" are magnetic.  If I understood correctly which ones he meant,
they appear to be a red/brown melt-bearing breccia, basically looking like
a lava rock with other jumbled lava rocks inside it.  Except we think it's
impact melt, not lava.  And now it turned out to be magnetic.

The tops of many of the mountains around Upper High Dry are lava-like
red-colored rocks.  Although I'm not sure that's where these are from,
it's the most obvious source of red when looking around there.  The
mountains on the left in this south-facing photo are an example:
    http://ian.kluft.com/blackrock/upperhidry-20070805/img_9838.jpg

This is interesting because indications of iron should be found in some
melt rocks at an impact site of an iron-nickel meteorite.  The energy
of the impact is sufficient to melt or evaporate 90% of the impactor,
according to "Traces of Catastrophe" and other sources.  Of course the
evaporated parts condensed again.
    http://www.lpi.usra.edu/publications/books/CB-954/CB-954.intro.html

Brad had already used the GRASS GIS software in February to process
LandSat multispectral infrared imagery.  He determined that there is a
higher concentration of iron in the rocks of the southern Black Rock
Range than in the surrounding region of northwestern Nevada.

------------------------------

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End of BR-Crater Digest, Vol 6, Issue 4
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