[meteorite-list] Another in the curious tektite series

[jason utas]

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 at 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: THSHarris1 at icloud.com
> Engineering Scientist
>
> Brooklyn NY USA
> 718 344 6016
>
> Web:
> Google Scholar T. H. S. Harris
> <https://scholar.google.com/citations?user=OZ6JzVIAAAAJ&hl=en>
> Research Gate <https://www.researchgate.net/profile/Thomas_Harris8>
>
>
> Cintos.org <http://cintos.org/> Survey: US LiDAR
> by M. E. Davias
> https://cbaysurvey.cintos.org
>
>
>
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