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Crumbling marble

Stone Conversations : Archive 1 : Message 00221

From: daniel andrade <danielvarela@xxxxxxxxxxx>
Date: Tue, 24 Aug 1999 07:33:13 PDT
Subject: Crumbling marble

Hello Andrei

I was thinking on marble and anisotropic behavoir.
Marble itself is not a sedimentary rock. It is a
metamorphic rock resulted from the transformation of
limestones at high levels of pressure and/or
temperature.

In this way, sometimes the transformation is not
complete and the resultant rock may have rests of the
original limestone. This may be the sugar-like spot of
your marble: rests of the original limestone that did
not metamorphize at all. The one-way behavoir may be
related to deposition and metamorphic conditions of the
rock.

Allthough, let me ask another geologysts to have a
better idea.

Hope I have helped you
Daniel

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