[meteorite-list] Chondrule Formation

[STARSANDSCOPES at aol.com]

Hi List,  A very interesting post.  It  seems electrical discharge is being 
seen as not likely for chondrule  formation.

I have seen chondrules with many types of structures that seem  to defy the 
conventional view of shock wave formation.  Some have  intertwined tubular 
features that resemble a barred chondrule in 3D.  SaU  001 exhibits these type 
quite well but they are sparse.   Any thoughts  on the subject of chemical 
reactions , migrations of minerals etc. causing some  of these unique forms and 
perhaps the chondrules themselves?  

We  see Widmanstatten Patterns form out of this process.  Could this "TYPE" 
of  process be at work with dust clumps under much lighter pressure than the  
irons?   

Go to my Micrograph Gallery  
http://www.meteorite.com/meteorite-gallery/meteorite-images/SaU-001-Zoom-3.jpg     This link should take you right to the 
image that provides a great example of  what I am talking about.  It is taken in 
reflected light which preserves  visual details that transmitted cross 
polarized light obscures.  

I  would humbly argue this formation does not "LOOK" to be formed by a shock  
wave.  I think many of the chondrule structures took a very long time to  
develop and many were as a result of rapid cooling.

Tom Phillips  




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