[meteorite-list] Martian Sedimentary Rocks: Where are they?

From: Thunder Stone <stanleygregr_at_meteoritecentral.com>
Date: Mon, 21 Mar 2011 09:34:00 -0700
Message-ID: <SNT117-W93C3A1B24AB9D2C81B0C4D2B50_at_phx.gbl>

List:
One would think that perhaps (one) would have some evidence of fusion crust on it out of the 30,000 plus meteorites found. ?Could?sedimentary?rocks on Mars be more rare the igneous? ?So rare that the chances of a piece being ejected off be very very slim.
I alway wonder to myself while hunting in the desert, "am I throwing down an old weathered achondrite of something else?"
Greg S.?

----------------------------------------
> Date: Mon, 21 Mar 2011 11:58:31 -0400
> From: cdtucson at cox.net
> To: meteorite-list at meteoritecentral.com; rob_mccafferty at yahoo.com; waltbranch at bellsouth.net
> Subject: Re: [meteorite-list] Martian Sedimentary Rocks: Where are they?
>
> Walter,
> This has been brought up before and is why I hate to hear the words, "it looks terrestrial".
>
> This link pretty much sums up your question;
>
> http://www.bccmeteorites.com/pigeonholing.htm
>
> Tony Irving's Martian web site says a lot about these as well.
>
> In addition; Blaine Reed's new XRF gun if used properly might be able to put us one step closer to discovering these missing finds.
> I know I have three self find prospects that without Blain's gun would still be sitting in a drawer. More on these later.
> Carl
>
> Carl or Debbie Esparza
> Meteoritemax
>
>
> ---- Rob McCafferty wrote:
> > Walter,
> >
> > There is also the intriguing possibility that they may be rather hard to spot after they land. Once the crust has weathered, they may look almost identical to terrestrial sedimentary rocks. It's a strange idea but there must also be earth meteorites lying around but none in our collections.
> > What is odd to me is that so far, none have turned up, to the best of my knowledge, from the ANSMET programme.
> >
> > Rob
> >
> > --- On Sun, 20/3/11, Walter Branch wrote:
> >
> > > From: Walter Branch
> > > Subject: Re: [meteorite-list] Martian Sedimentay Rocks: Where are they?
> > > To: "Walter Branch" , "meteorite-list"
> > > Date: Sunday, 20 March, 2011, 4:11
> > > Sorry.
> > >
> > > Meant to type "sedimentary"
> > >
> > > -Walter
> > >
> > > ----- Original Message ----- From: "Walter Branch"
> > > To: "meteorite-list"
> > > Sent: Sunday, March 20, 2011 12:09 AM
> > > Subject: [meteorite-list] Martian Sedimentay Rocks: Where
> > > are they?
> > >
> > >
> > > > Hello Everyone,
> > > >
> > > > We all know that a long time ago, Mars had a lot of
> > > water. Rivers, streams lakes, ponds, oceans,
> > > etc. Every bit of evidence we have leads to this
> > > conclusion.
> > > >
> > > > Why are there no sedimenrary martian meteorites?
> > > They are all igneous.
> > > >
> > > > Did sedimentation occur in a period after large
> > > meteorites blasted rocks off the Martian surface
> > > (doubtful)? Are they extremly fragile and would not
> > > survive atmospheric entry (Doubtful)? Have they
> > > weathered away (don't know)?
> > > >
> > > > Any opinions?
> > > >
> > > > -Walter Branch
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Received on Mon 21 Mar 2011 12:34:00 PM PDT