[meteorite-list] impact melts

[j.divelbiss at att.net]

Stan,

Well heck then...I don't know THAT much about these things. :)

Good luck,

JD





-------------- Original message from "stan ." <laser_maniac at hotmail.com>: -------------- 


> what about the F chonderite inclusions in aubrites, specifically cumberland 
> falls - is that a xenolith of unrelated material, or is it unmelted 
> precursor material? 
> 
> and dont forget chondrules in polymict ureilites! :) 
> 
> 
> >From: j.divelbiss at att.net 
> >To: "stan ." , 
> >info at meteorites.com.au,fprochaska at verizon.net, 
> >meteorite-list at meteoritecentral.com 
> >Subject: Re: [meteorite-list] impact melts 
> >Date: Wed, 06 Apr 2005 20:21:57 +0000 
> > 
> >Stan and others, 
> > 
> >Acapulcoites, Brachinites, Lodranites, and Winonaites have been thought of 
> >as being "primitive" achondrites that may have chondrules, especially 
> >acapulcoites. I've always thought of these as being "tweeners" in between 
> >chondrites and achondrites....differentiated a lot, but not quite absent of 
> >chondritic characteristics like remnant chondrules. Their age signature is 
> >still from longggg ago. 
> > 
> >I agree (IMHO) with others to say that impact melting alone does not make 
> >an achondrite. It is primarily a function of differentiation. 
> > 
> >John 
> > 
> > 
> >-------------- Original message from "stan ." : 
> >-------------- 
> > 
> > 
> > > 
> > > 
> > > > 
> > > >Achondrites - (a-kon-drites) meteorites whose composition has been 
> > > >significantly altered from the early/primative chondritic material. 
> > > >Chondrules are not present. 
> > > 
> > > you cant say that because some achonderites contain chondrules - i have 
> >an 
> > > end cut of dhofar 125, an acapulcoite that has a chondrule or two 
> >visable 
> > > 
> > > 
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> 
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