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<p>[QUOTE=&quot;silverthwait, post: 12112, member: 103&quot;]Have never heard about any of that -- except I do know what kaolin is.&nbsp; Will try to find that book!</p><p><br /></p><p>(Just so that my ego doesn&#039;t melt into my shoes, I&#039;ll bet that most people don&#039;t know what marl is, where to find it, and what it is used for.)[/QUOTE]</p><p><br /></p>

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