[meteorite-list] What is or is not a chondrule?

[MEM]

Hello Tom,  excellent photo!
I believe this is one of those "heated-cooled-heated-quenched" cycled chondrules and the "crosses" are the seed/loci of crystallization: the "de-vitrification" of the glass matrix into ordered alignment of the molecules( aka crystallized solid).  In other words, this is a frozen example one phase of the chondrule forming process.  It is a body that lies between glass/dust and crystallized.

Were we able to watch this process in time lapse we would see the crosses grow in length and width until all the matrix was converted.

Elton


> Tom Philips wrote:
> 
> >... I wonder if this weird crystal structure
> found  in a slice of JaH 055 would 
> > qualify for being called a chondrule or a small 
> inclusion...

> > http://www.meteorite.com/meteorite-gallery/meteorite-pages/JaH-055-Crystal.htm
> 
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