[BR-Crater] Shocked Quartz

Mon Sep 7 15:54:17 PDT 2009

I have been to the Sudbury Canada crater, Kentland Indiana crater and Meteor Carter AZ. I have collected shatter cones at the first two, one in quartzite and the other in limestone. I gave Ian a piece of the shock metamorphosed quartz which also makes great sharpening stones. In both places the shatter cones were obvious. I would reccomend looking in areas in which you find fractured quartz and collecting for x-ray diffraction analysis for coesite and stishovite. It is very difficult to see laminar shock effects in quartz grains unless you do think sections and use a good microscope. Most universities can help with mineral id work. I will be at the Arliss launch on the 13th in the afternoon.

Charlie Wittman, RG, CEG, REA, Director, Advocates for Children and Families
KI6PQQ
LUNAR #1405, http://www.lunar.org 
Aero-Pac # 699 http://www.aeropac.org 
NAR [L3] #85655, http://www.nar.org 
Tripoli [L3} #11202 www.tripoli.org

> From: br-crater-request at thunder.net
> Subject: BR-Crater Digest, Vol 21, Issue 1
> To: br-crater at thunder.net
> Date: Mon, 7 Sep 2009 12:00:02 -0700
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> Today's Topics:
> 
> 1. Black Rock trip next weekend? (Ian Kluft)
> 2. Check out my photos on Facebook (Moni Waiblinger)
> 3. Re: Check out my photos on Facebook (Moni Waiblinger)
> 4. Re: Black Rock trip next weekend? (Scot Wilcoxon)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sun, 6 Sep 2009 21:43:44 -0700
> From: Ian Kluft <ikluft at thunder.sbay.org>
> Subject: [BR-Crater] Black Rock trip next weekend?
> To: Black Rock crater discussion <br-crater at thunder.net>
> Message-ID: <20090907044344.GA14507 at thunder.sbay.org>
> Content-Type: text/plain; charset=us-ascii
> 
> The Burning Man crowds should be leaving the playa now that it's over.
> How does next weekend (Sept 12-13) sound for a trip to Black Rock
> for some crater research?
> 
> By what Rich told me earlier, if we can't arrange something by the middle
> of this month then his schedule will open up again in early October.
> 
> I got a call from Andrew Klofas KI6LZP (a new Stratofox member who is now
> also on the br-crater mail list) asking when the next trip to Black Rock will
> be. So his question reminded me we had this possibility coming up.
> 
> Some advice that I received from David Rajmon (maintainer of the Impact
> Database) is to "direct your attention to finding shock indicators." We've
> pretty much taken the map studying and internet searches as far as we can -
> any more of that becomes pointless without finding the proof in the rocks.
> (Of course we know how this happened - Internet searches don't require
> out-of-pocket expenses. Trips do.)
> 
> After the trip to Pahsupp Mountain in April, I'm not encouraged about finding
> in-situ shatter cones. The rocks in the area are mostly coarse-grained which
> won't make the textbook-style shatter cone patterns, which blows away my
> strategy of using that as the "easy" way to find proof. Though Rich tried
> to encourage me saying that in his geology field research, his experience is
> that even if you know what you're looking for, you may be lucky if you find
> it in 20 trips.
> 
> So my suggestion is we won't give up on looking for shatter cones. But now
> we'll also add focus on collecting specific rocks for study in an electron
> microscope. There should be plenty of evidence of shock in rocks there given
> everything else we've learned about the area.
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Sun, 6 Sep 2009 23:52:53 -0700
> From: Moni Waiblinger <invite+zrdocidplz1e at facebookmail.com>
> Subject: [BR-Crater] Check out my photos on Facebook
> To: "Br-crater at thunder.net" <br-crater at thunder.net>
> Message-ID: <ee08dfb691bafbf816c011c98c7fbe14 at localhost.localdomain>
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> Hi br-crater at thunder.net,
> 
> I set up a Facebook profile where I can post my pictures, videos and events and I want to add you as a friend so you can see it. First, you need to join Facebook! Once you join, you can also create your own profile.
> 
> Thanks,
> Moni
> 
> To sign up for Facebook, follow the link below:
> http://www.facebook.com/p.php?i=1641049679&k=ZYA4YZ54RWTF6BD1QCVZUWYP2P&r
> 
> 
> br-crater at thunder.net was invited to join Facebook by Moni Waiblinger. If you do not wish to receive this type of email from Facebook in the future, please click on the link below to unsubscribe.
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> Message: 3
> Date: Mon, 7 Sep 2009 00:01:42 -0700
> From: Moni Waiblinger <moni2555 at hotmail.com>
> Subject: Re: [BR-Crater] Check out my photos on Facebook
> To: ian's kluft <br-crater at thunder.net>
> Message-ID: <COL106-W18A3F661B6B0817FC10B80CDEB0 at phx.gbl>
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> 
> Hi - I am sorry for this post!
> 
> One click and it wnet everywhere!
> 
> 
> 
> Sorry, Moni
> 
> 
> 
> Date: Sun, 6 Sep 2009 23:52:53 -0700
> To: br-crater at thunder.net
> From: invite+zrdocidplz1e at facebookmail.com
> Subject: [BR-Crater] Check out my photos on Facebook
> 
> 
> 
> 
> 
> 
> 
> 
> 
> facebook
> 
> 
> 
> 
> Check out my photos on Facebook
> Hi br-crater at thunder.net,
> 
> I set up a Facebook profile where I can post my pictures, videos and events and I want to add you as a friend so you can see it. First, you need to join Facebook! Once you join, you can also create your own profile.
> 
> Thanks,
> Moni
> 
> 
> 
> 
> 
> 
> To sign up for Facebook, follow the link below:http://www.facebook.com/p.php?i=1641049679&k=ZYA4YZ54RWTF6BD1QCVZUWYP2P&r
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> 
> 
> br-crater at thunder.net was invited to join Facebook by Moni Waiblinger. If you do not wish to receive this type of email from Facebook in the future, please click here to unsubscribe.
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> Message: 4
> Date: Mon, 7 Sep 2009 13:19:25 -0500 (CDT)
> From: "Scot Wilcoxon" <scot at wilcoxon.org>
> Subject: Re: [BR-Crater] Black Rock trip next weekend?
> To: br-crater at thunder.net
> Message-ID: <45123.97.116.86.87.1252347565.squirrel at mail.pcann.com>
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> 
> If we're looking for shock effects, those seem most likely in the inner
> part of the ring. Inside half of the ring's radius, shock effects are
> expected in underlying rock.
> 
> An obvious target for study are the columnar jointed bluff formation. 
> However, if these are crater-bottom melt, the place to look for shock
> effect should be under this formation. Is there a different layer
> accessible under the columnar formation?
> 
> If not sampling directly under the columnar formation, an alternative is
> any rock formation at a lower altitude than the columnar formation.
> 
> Something with quartz can be examined for shocked quartz. I don't know
> how one tests for coesite or stishovite.
> 
> Another area to consider is Wallace's Sulphur formations. The three
> formations (red conglomerate, Camel Conglomerate, white breccia layer)
> have different characteristics which could be formed by different steps of
> the impact process. Shock effects are possible in each for different
> reasons -- native rock could have been shocked in place during fracture
> into conglomerate, while some shocked rock may be in splash in higher
> levels.
> 
> Do we already have suitable samples from the Sulphur formations?
> 
> Another possibility is the several layers of Soldier Meadows Tuff.
> 
> Access is an issue. Is there a suitable stream or road cut through either
> Sulphur or Soldier Meadows formations? Or maybe horizontal travel among
> the scattered formations along the east edge of the playa would be better
> for this first trip with a different focus.
> 
> ...
> > So my suggestion is we won't give up on looking for shatter cones. But
> > now
> > we'll also add focus on collecting specific rocks for study in an electron
> > microscope. There should be plenty of evidence of shock in rocks there
> > given
> > everything else we've learned about the area.
> 
> 
> 
> 
> 
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