Re: [meteorite-list] Another in the curious tektite series

[jason utas via Meteorite-list]

Those are skin splits, not contacts.  Its surface had cooled to form a
skin, interior was still molten / plastic.  See Nininger & Huss (1967):

https://www.science.org/doi/abs/10.1126/science.157.3784.61

http://www.tektites.co.uk/stretch.html



On Mon, Mar 13, 2023 at 9:19 AM Thomas Harris iMac via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:

> I always enjoy the irregular shapes in tektites because the standard
> dumbbells, teardrops and spheroids are exactly that, standard.
>
> This is a 5 cm irregular or fragment-form Australasian tektite from Viet
> Nam with what appears to have smeared indentations from low speed
> contact(s), presumedly with other equally soft-skinned tektites.  This is
> problematic because the through-body re-heating above glass temperature and
> plastic deformation don’t happen with aerodynamic heating and ablation.  At
> the very least the skin of this tektite seems to have been reheated after
> solidification, retaining fine surface texture outside of the smear
> channels.  If this is ascent-phase after solidification, that is a large
> displacement from the source location for collision with multiple other
> tektites.  If this is descent-phase, why are tektites on converging
> trajectories after the better part of an hour or more to solidify before
> reentry?
>
> The highly ‘platy' coarse morphology relative to any spheroidal protomorph
> makes the formative process quite puzzling.
>
> When the Indochina region is considered as probable source for this distal
> impact ejecta glass, it directly disagrees with a first principles
> suborbital analysis of ablated tektites, which shows the source region must
> like across eastern North America per Harris (2022) and Davias, Harris
> (2022).
>
> https://www.youtube.com/shorts/FqenhEGuGrY
>
>
> Thomas “Tim” Harris
> Email: thsharr...@icloud.com
> Engineering Scientist
>
> Brooklyn NY USA
> 718 344 6016
>
> Web:
> Google Scholar T. H. S. Harris
> 
> Research Gate 
>
>
> Cintos.org  Survey: US LiDAR
> by M. E. Davias
> https://cbaysurvey.cintos.org
>
>
>
> __
> Meteorite-list mailing list
> Meteorite-list@meteoritecentral.com
> https://pairlist2.pair.net/mailman/listinfo/meteorite-list
__
Meteorite-list mailing list
Meteorite-list@meteoritecentral.com
https://pairlist2.pair.net/mailman/listinfo/meteorite-list

[meteorite-list] Another in the curious tektite series

[Thomas Harris iMac via Meteorite-list]

I always enjoy the irregular shapes in tektites because the standard dumbbells, 
teardrops and spheroids are exactly that, standard. 

This is a 5 cm irregular or fragment-form Australasian tektite from Viet Nam 
with what appears to have smeared indentations from low speed contact(s), 
presumedly with other equally soft-skinned tektites.  This is problematic 
because the through-body re-heating above glass temperature and plastic 
deformation don’t happen with aerodynamic heating and ablation.  At the very 
least the skin of this tektite seems to have been reheated after 
solidification, retaining fine surface texture outside of the smear channels.  
If this is ascent-phase after solidification, that is a large displacement from 
the source location for collision with multiple other tektites.  If this is 
descent-phase, why are tektites on converging trajectories after the better 
part of an hour or more to solidify before reentry?

The highly ‘platy' coarse morphology relative to any spheroidal protomorph 
makes the formative process quite puzzling. 

When the Indochina region is considered as probable source for this distal 
impact ejecta glass, it directly disagrees with a first principles suborbital 
analysis of ablated tektites, which shows the source region must like across 
eastern North America per Harris (2022) and Davias, Harris (2022).  

https://www.youtube.com/shorts/FqenhEGuGrY 



Thomas “Tim” Harris
Email: thsharr...@icloud.com 
Engineering Scientist

Brooklyn NY USA
718 344 6016

Web:
Google Scholar T. H. S. Harris 
  
Research Gate 


Cintos.org Survey: US LiDAR
by M. E. Davias
https://cbaysurvey.cintos.org 



__
Meteorite-list mailing list
Meteorite-list@meteoritecentral.com
https://pairlist2.pair.net/mailman/listinfo/meteorite-list