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

[Rob McCafferty]

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 <waltbranch at bellsouth.net> wrote:

> From: Walter Branch <waltbranch at bellsouth.net>
> Subject: Re: [meteorite-list] Martian Sedimentay Rocks: Where are they?
> To: "Walter Branch" <waltbranch at bellsouth.net>, "meteorite-list" <meteorite-list at meteoritecentral.com>
> Date: Sunday, 20 March, 2011, 4:11
> Sorry.
> 
> Meant to type "sedimentary"
> 
> -Walter
> 
> ----- Original Message ----- From: "Walter Branch" <waltbranch at bellsouth.net>
> To: "meteorite-list" <meteorite-list at meteoritecentral.com>
> 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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