[meteorite-list] A question????? another answer

[cdtucson at cox.net]

Elton, 
There you go again providing the perfect answers. Thank you. 
I have a few follow-up questions for you;
If an Earth meteorite (terrene) were to return back to Earth, would we be able to identify it correctly? That is to say would we not simply ASSume it came from the moon? As a moon meteorite would also have Earth air or isotopes? We make new supposed Lunar meteorite discoveries with new materials all the time. So again I ask is there a way to be certain where it came from? I ask because if is not mostly plagioclase, it seems to me most investigators would simply toss it aside and say; it is not a meteorite, that is a rind or weathered Earth rock not fusion crust. So, another question would be this; if it clearly has a fusion crust complete with the gas bubbles would there be a way to prove it is in fact a genuine fusion crust??? Thanks 
Carl Esparza
IMCA 5829


---- Mr EMan <mstreman53 at yahoo.com> wrote: 
> 
> Pete sometime let me tell you about the First Church of the Navelites.. but to your question
> 
> They would be called meteorites until identified as originating from the Earth--then the debate is opened up again.
> 
> Recently someone at NASA or in the IAU stated the new definition of meteorite includes any rocky object falling onto the surface of any planet should be regarded as a meteorite (my translation)
> 
> I recently read a calculation of the number of Earth originating rocks gone to meteorites on the moon and on Mars and it was a fairly high number within the realistic realm of being identified as such.
> 
> A further subset of missing nomenclature is what to call returning non tektite ejecta that may have orbited a while and get returned much later.  The Reis impactor is a candidate for having been able to eject rocks into orbit.  As I've mentioned it before, it hurled some multi-ton limestone boulders over 60 miles up a mountain side in Austria.
> 
> A meteorite could not eject material into space from earth but an asteroid sized impactor most certainly has in the past.  That is the physics don't prohibit it.
> 
> Elton
> --- On Fri, 6/5/09, Pete Shugar at clearwire.net <pshugar at clearwire.net> wrote:
> 
> > From: Pete Shugar at clearwire.net <pshugar at clearwire.net>
> > Subject: [meteorite-list] A question?????
> > To: meteorite-list at meteoritecentral.com
> > Date: Friday, June 5, 2009, 12:02 AM
> > We have the Martian type meteorite,
> > and we have the
> > Lunar meteorite and last, the asteroid 4Vesta meteorite.
> > These we know where they come from.
> > 
> > Now the question---given enough energy, can a meteorite
> > hit earth and eject debris which (maybe) land on the moon
> > or Mars? What would we call such a meteorite---Earthoid,
> > or maybe Earthite?
> > Just contemplating my navel here.
> > Pete
> > 
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