[meteorite-list] Steves unproven tektite theory by Steve lol!

From: Aubrey Whymark <tinbider_at_meteoritecentral.com>
Date: Tue, 28 Feb 2012 04:30:40 +0000 (GMT)
Message-ID: <1330403440.5743.YahooMailNeo_at_web132502.mail.ird.yahoo.com>

Are you sure these are flow lines? U-grooves are most definitely etched. These might be internal flow, varying slightly in chemistry, that have been etched. I have never seen flow lines on any tektite other than australites and javaites i.e. ablated forms.
?
Aubrey
?
----- Original Message -----
From: Steve Dunklee <steve.dunklee at yahoo.com>
To: Aubrey Whymark <tinbider at yahoo.co.uk>
Cc:
Sent: Tuesday, 28 February 2012, 4:33
Subject: Re: [meteorite-list] Steves unproven tektite theory by Steve lol!

Flow lines on a teardrop covering u grooves made during flight
cheers
Steve


o.co.uk> wrote:

> From: Aubrey Whymark <tinbider at yahoo.co.uk>
> Subject: Re: [meteorite-list] Steves unproven tektite theory by Steve lol!
> To: "Meteorite list" <meteorite-list at meteoritecentral.com>
> Date: Monday, February 27, 2012, 4:35 AM
> Hi John and list
> ?
> I only check this list every week or so! I'm real busy with
> work and also writing my tektite book. It is very well
> progressed now - so hopefully soon, but the longer it takes
> the better it gets (I hope)! I said 2011, now 2012 (end of)!
> I have some very interesting new interpretations coming
> forward regarding the role of plastic deformation in almost
> ALL tektites. Check out my abstract for the LPI conference.
> http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1045.pdf
> ?
> Regards, Aubrey
> ?
> ?
> ?
> ?
> ----- Original Message -----
> From: John.L.Cabassi <John at Cabassi.net>
> To: 'Aubrey Whymark' <tinbider at yahoo.co.uk>
> Cc:
> Sent: Monday, 27 February 2012, 5:25
> Subject: RE: [meteorite-list] Steves unproven tektite theory
> by Steve lol!
>
> G'Day Aubrey
> Thank you. I've been watching this thread develop. I wanted
> to jump in
> but I wanted to see what further information people were
> willing to
> offer up. And I said to Kat, it's amazing that Aubrey hasn't
> jumped in
> and I just got home and logged in and sure enough, you're up
> close and
> personal.
>
>
> Cheers,
> John
>
> John Cabassi - Johnno
> IMCA #2125
> www.MeteoriteJunction.com
> MeteoriteHQ.Com? (still under construction)
> Twitter: _at_meteoritejohnno
> http://facebook.com/MeteoriteJohnno
>
>
>
>
>
> -----Original Message-----
> From: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com]
> On Behalf Of Aubrey
> Whymark
> Sent: Sunday, February 26, 2012 6:21 PM
> To: Meteorite list
> Subject: Re: [meteorite-list] Steves unproven tektite theory
> by Steve
> lol!
>
>
> Hi
> ?
> The etching is genuine. The statement that 'if etching was
> terrestrial
> then the whole surface would be etched' is incorrect.You
> have to
> remember that different surfaces have been exposed to
> different
> conditions. Some surfaces simply have no stresses and lines
> of weakness
> for chemical attack to occur and if it does occur then it is
> more even
> on these surfaces. The posterior smooth surface, which was
> not exposed
> to re-entry heating, generally survives very well. The
> spalled areas or
> bald areas again have no lines of weakness and often avoid
> etching. The
> anterior surface which suffered re-entry heating and then
> rapid cooling
> has many lines of weakness and is readily attacked. If you
> take the
> stretch tektites then the exterior surface was cooled,
> re-heated and
> then rapidily cooled. The interior stretch part was exposed
> late on -
> either due to impact breakage or more likely thermal
> breakage when the
> tektite had lost its inherited cosmic velocity and shock?
> wave and then
> rapidly cooled. This exposed stretch surface simply cooled.
> The two
> surfaces are very different in terms of thermal history and
> weaknesses,
> hence one is heavily etched and the other lightly or not
> etched.
> ?
> If you don't believe that pitting can form by natural
> etching then study
> ancient soda glass. Islamic glass jeton is great as it can
> be accurately
> dated. This material, sometimes over 1000 years old will
> sometimes show
> pitting. Soda glass is a lot lower in quality compared with
> tektite
> glass and so the process of etching is quicker.
> ?
> Etching is genuine, but is not random - this is the key
> point. It
> attacks cracks and weaknesses caused as the tektite cooled
> then
> re-entered the atmosphere.
> ?
> If you want to study etching then start with moldavites and
> then work
> towards the more recent Australasian tektites. Etching is a
> tricky
> subject btw. Etching is, strictly speaking, alkaline attack
> that targets
> the silica network. This usually creates v-grooves. Leaching
> is the acid
> attack which is more common as tektites usually occur
> reworked in porous
> and permeable gravels exposed to meteoric waters. Acid
> attack targets
> the alkaline component in the glass. The acid attack usually
> results in
> rounded pitting and u-grooves. The two processes can also
> act in
> parallel if conditions are right. The geological and
> reworking history
> of an individual specimen is often complex and, combined
> with abrasion
> from transportation, can result in a diversity of sculpture
> and
> morphologies. I know that etching is genuine, but I still
> wondered if
> some of the anterior sculpture on indochinites was original.
> I don't
> think it is. Another way to study etching is to collect half
> a ton of
> different tektites with various stages of sculpture. Your
> wife will be
> happy with that suggestion.
> ?
> Also, tektites are glass, quenched very quickly - no
> crystals or
> crystallites here!
> ?
> Regards, Aubrey Whymark
>
> From: Daniel <rainteach at aol.com>
> To: meteorite-list at meteoritecentral.com
>
> Sent: Saturday, 25 February 2012, 19:26
> Subject: Re: [meteorite-list] Steves unproven tektite theory
> by Steve
> lol!
>
> Hi Carl,
>
> I don't agree with everything about this theory, I just
> thought it was
> interesting. There all still a lot of unknowns when it comes
> to
> tektites.
>
> Are you a tektite collector?
>
> Best Regards,
> Daniel Sutherland
>
>
>
> On Feb 25, 2012, at 9:45 AM, <cdtucson at cox.net>
> wrote:
>
> > Daniel, Steve,
> > All due respect to this theory.
> > I'd like to hear more? about this theory because he
> says;
> > "Theories about chemical etching and spalling as the
> major creators of
> surface sculpturing have been proven unlikely."
> > He does not explain this statement. How has this been
> proven unlikely?
>
> > If his theory is true. How do you explain all of the
> glass rocks found
> that have the same surface features as tektites but, have
> been ruled out
> as tektites based largely on the amount of H2O within them?
> > Arizonaites( Saffordites) ?, Columbianites?, etc.
> >
> > Carl
> > meteoritemax
> >
> > --
> > Cheers
> >
> > ---- Daniel <rainteach at aol.com>
> wrote:
> >> Hi all,
> >>
> >> Take a look at this website.
> >>
> >> http://www.edamgaard.dk/Copy%20of%20VietnamTektites%20edj.htm
> >>
> >>
> >> Cheers,
> >> Daniel Sutherland
> >>
> >> Sent from my iPhone
> >>
> >> On Feb 24, 2012, at 11:19 PM, "Dan Wray" <daniel_wray at comcast.net>
>
> >> wrote:
> >>
> >>> Steve,
> >>>
> >>> I am a tektite collector and I agree with you
> about the so called
> >>> etching. If you look at broken fragments of
> hollow tektites the
> >>> inside surface is smooth and the outside
> textured.? You can also see
>
> >>> this on stretched specimens, the stretched area
> is smooth.? This so
> >>> called etching is bogus.
> >>>
> >>> Dan Wray
> >>> ----- Original Message ----- From: "Steve
> Dunklee"
> >>> <steve.dunklee at yahoo.com>
> >>> To: <Meteorite-list at meteoritecentral.com>
> >>> Sent: Friday, February 24, 2012 1:41 PM
> >>> Subject: [meteorite-list] Steves unproven
> tektite theory by Steve
> lol!
> >>>
> >>>
> >>>>
> >>>> I believe the features on most tektites are
> produced during
> >>>> formation and not by etching. As the molten
> material reaches the
> >>>> upper atmosphere they reach a verry cold
> environment with low
> >>>> atmospheric pressure. The skin of the
> material is outgassing? while
>
> >>>> being exposed to sub zero temps. this
> outgassing while freezing
> >>>> causes the skin to crystalize in strange
> shapes. then they are
> >>>> smoothed off during re entry which reaches
> speeds over the speed of
>
> >>>> sound. when wet limestone mud freezes in
> winter it causes similar
> >>>> crystal formations. when you mash them down
> they look like the
> >>>> surface of tektites. the molten material
> travels up to 4 or 5 miles
>
> >>>> in a molten state where it is quenched by
> sub zero tempratures
> >>>> causing crystalization. then re heated
> during its fall back to
> >>>> earth. the deep sharp grooves made during
> cooling are rounded off
> >>>> during re melting. I have a teardrop with
> smooth glassy surface on
> >>>> one end with no etching. if the etching was
> terestrial
> the
> >>>> whole tektite would be etched.
> >>>> Cheers
> >>>> Steve Dunklee
> ______________________________________________
> >>>>
> >>>> Visit the Archives at
> >>>> http://www.meteoritecentral.com/mailing-list-archives.html
> >>>> Meteorite-list mailing list
> >>>> Meteorite-list at meteoritecentral.com
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> >>>
> >>>
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Received on Mon 27 Feb 2012 11:30:40 PM PST