[meteorite-list] Origin of Tektites

[Ed Majden]

	Are there any tektite experts on this list?  The formation of  
tektites has been a mystery to science.  Volcanic origin, Lunar  
ejecta, meteorite impact origin, explosive electrical discharge,  
etc.  The latter proposed by NASA experiments at an arc-jet  
facility.  What are the current theories on the formation of  
tektites.  Are there any papers on this that I could get my hands on?
Thanks:
Ed Majden
Courtenay, B.C.
Canada