[meteorite-list] Caliche

[MarkF]

Hi Walter

I'm surprised this question hasn't come up more often. Its a common problem 
in paleo and archaeo dig sites and of course, they will most often have some 
undergrad attack it with dental picks and such so as to not loose any of the 
specimen, but other methods are usable for calcium carbonates, depending on 
your desire to attack it. Acetic acid would be one option, and although 
water is the solvent which put it there in the first place, its often slow.
There are better acids for such, and I  believe I heard someone say they 
used one of those products you mentioned like lime away or clr. But on any 
of these chemical removals, it sure wouldn't want to be done on something to 
be studied as there surely will be some interaction with the specimen.
Mark
----- Original Message ----- 
From: "Walter Branch" <branchw at bellsouth.net>
To: <meteorite-list at meteoritecentral.com>
Sent: Thursday, December 02, 2004 11:11 AM
Subject: [meteorite-list] Caliche


> Hello Everyone,
>
> Speaking of Caliche...
>
> Does the Caliche (form of calcium carbonate) that we sometimes see on 
> desert
> meteorites replace the fusion crust that is present or does it form a 
> layer
> over the crust?
>
> -Walter
>
>
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