rich Wrote:
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_snip>

>However, not having
>looked at asbestos-based cements, I personally
>have this this nagging reservation not to cross
>those off the list of possibilities.

What asbestos mineral is showing up in the XRD results? There is not a lot of Mg and/or Al in the Lauer sample either. There is little to no MgO and Al2O3 based cement in the Lauer sample.

Archae Solenhofen (solenhofen@hotmail.com)